OSCL-LXR linux-6.0.1/​net/​bluetooth/​hci_sync.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0
 /*
  * BlueZ - Bluetooth protocol stack for Linux
  *
  * Copyright (C) 2021 Intel Corporation
  */
 
 #include <linux/property.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 #include <net/bluetooth/mgmt.h>
 
 #include "hci_request.h"
 #include "hci_debugfs.h"
 #include "smp.h"
 #include "eir.h"
 #include "msft.h"
 #include "aosp.h"
 #include "leds.h"
 
 static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
                   struct sk_buff *skb)
 {
     bt_dev_dbg(hdev, "result 0x%2.2x", result);
 
     if (hdev->req_status != HCI_REQ_PEND)
         return;
 
     hdev->req_result = result;
     hdev->req_status = HCI_REQ_DONE;
 
     if (skb) {
         struct sock *sk = hci_skb_sk(skb);
 
         /* Drop sk reference if set */
         if (sk)
             sock_put(sk);
 
         hdev->req_skb = skb_get(skb);
     }
 
     wake_up_interruptible(&hdev->req_wait_q);
 }
 
 static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
                       u32 plen, const void *param,
                       struct sock *sk)
 {
     int len = HCI_COMMAND_HDR_SIZE + plen;
     struct hci_command_hdr *hdr;
     struct sk_buff *skb;
 
     skb = bt_skb_alloc(len, GFP_ATOMIC);
     if (!skb)
         return NULL;
 
     hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
     hdr->opcode = cpu_to_le16(opcode);
     hdr->plen   = plen;
 
     if (plen)
         skb_put_data(skb, param, plen);
 
     bt_dev_dbg(hdev, "skb len %d", skb->len);
 
     hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
     hci_skb_opcode(skb) = opcode;
 
     /* Grab a reference if command needs to be associated with a sock (e.g.
      * likely mgmt socket that initiated the command).
      */
     if (sk) {
         hci_skb_sk(skb) = sk;
         sock_hold(sk);
     }
 
     return skb;
 }
 
 static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
                  const void *param, u8 event, struct sock *sk)
 {
     struct hci_dev *hdev = req->hdev;
     struct sk_buff *skb;
 
     bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
 
     /* If an error occurred during request building, there is no point in
      * queueing the HCI command. We can simply return.
      */
     if (req->err)
         return;
 
     skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
     if (!skb) {
         bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
                opcode);
         req->err = -ENOMEM;
         return;
     }
 
     if (skb_queue_empty(&req->cmd_q))
         bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
 
     hci_skb_event(skb) = event;
 
     skb_queue_tail(&req->cmd_q, skb);
 }
 
 static int hci_cmd_sync_run(struct hci_request *req)
 {
     struct hci_dev *hdev = req->hdev;
     struct sk_buff *skb;
     unsigned long flags;
 
     bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
 
     /* If an error occurred during request building, remove all HCI
      * commands queued on the HCI request queue.
      */
     if (req->err) {
         skb_queue_purge(&req->cmd_q);
         return req->err;
     }
 
     /* Do not allow empty requests */
     if (skb_queue_empty(&req->cmd_q))
         return -ENODATA;
 
     skb = skb_peek_tail(&req->cmd_q);
     bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
     bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
 
     spin_lock_irqsave(&hdev->cmd_q.lock, flags);
     skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
     spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
 
     queue_work(hdev->workqueue, &hdev->cmd_work);
 
     return 0;
 }
 
 /* This function requires the caller holds hdev->req_lock. */
 struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
                   const void *param, u8 event, u32 timeout,
                   struct sock *sk)
 {
     struct hci_request req;
     struct sk_buff *skb;
     int err = 0;
 
     bt_dev_dbg(hdev, "Opcode 0x%4x", opcode);
 
     hci_req_init(&req, hdev);
 
     hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
 
     hdev->req_status = HCI_REQ_PEND;
 
     err = hci_cmd_sync_run(&req);
     if (err < 0)
         return ERR_PTR(err);
 
     err = wait_event_interruptible_timeout(hdev->req_wait_q,
                            hdev->req_status != HCI_REQ_PEND,
                            timeout);
 
     if (err == -ERESTARTSYS)
         return ERR_PTR(-EINTR);
 
     switch (hdev->req_status) {
     case HCI_REQ_DONE:
         err = -bt_to_errno(hdev->req_result);
         break;
 
     case HCI_REQ_CANCELED:
         err = -hdev->req_result;
         break;
 
     default:
         err = -ETIMEDOUT;
         break;
     }
 
     hdev->req_status = 0;
     hdev->req_result = 0;
     skb = hdev->req_skb;
     hdev->req_skb = NULL;
 
     bt_dev_dbg(hdev, "end: err %d", err);
 
     if (err < 0) {
         kfree_skb(skb);
         return ERR_PTR(err);
     }
 
     return skb;
 }
 EXPORT_SYMBOL(__hci_cmd_sync_sk);
 
 /* This function requires the caller holds hdev->req_lock. */
 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
                    const void *param, u32 timeout)
 {
     return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
 }
 EXPORT_SYMBOL(__hci_cmd_sync);
 
 /* Send HCI command and wait for command complete event */
 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
                  const void *param, u32 timeout)
 {
     struct sk_buff *skb;
 
     if (!test_bit(HCI_UP, &hdev->flags))
         return ERR_PTR(-ENETDOWN);
 
     bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
 
     hci_req_sync_lock(hdev);
     skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
     hci_req_sync_unlock(hdev);
 
     return skb;
 }
 EXPORT_SYMBOL(hci_cmd_sync);
 
 /* This function requires the caller holds hdev->req_lock. */
 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
                   const void *param, u8 event, u32 timeout)
 {
     return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
                  NULL);
 }
 EXPORT_SYMBOL(__hci_cmd_sync_ev);
 
 /* This function requires the caller holds hdev->req_lock. */
 int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
                  const void *param, u8 event, u32 timeout,
                  struct sock *sk)
 {
     struct sk_buff *skb;
     u8 status;
 
     skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
     if (IS_ERR(skb)) {
         bt_dev_err(hdev, "Opcode 0x%4x failed: %ld", opcode,
                PTR_ERR(skb));
         return PTR_ERR(skb);
     }
 
     /* If command return a status event skb will be set to NULL as there are
      * no parameters, in case of failure IS_ERR(skb) would have be set to
      * the actual error would be found with PTR_ERR(skb).
      */
     if (!skb)
         return 0;
 
     status = skb->data[0];
 
     kfree_skb(skb);
 
     return status;
 }
 EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
 
 int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
               const void *param, u32 timeout)
 {
     return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
                     NULL);
 }
 EXPORT_SYMBOL(__hci_cmd_sync_status);
 
 static void hci_cmd_sync_work(struct work_struct *work)
 {
     struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
 
     bt_dev_dbg(hdev, "");
 
     /* Dequeue all entries and run them */
     while (1) {
         struct hci_cmd_sync_work_entry *entry;
 
         mutex_lock(&hdev->cmd_sync_work_lock);
         entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
                          struct hci_cmd_sync_work_entry,
                          list);
         if (entry)
             list_del(&entry->list);
         mutex_unlock(&hdev->cmd_sync_work_lock);
 
         if (!entry)
             break;
 
         bt_dev_dbg(hdev, "entry %p", entry);
 
         if (entry->func) {
             int err;
 
             hci_req_sync_lock(hdev);
             err = entry->func(hdev, entry->data);
             if (entry->destroy)
                 entry->destroy(hdev, entry->data, err);
             hci_req_sync_unlock(hdev);
         }
 
         kfree(entry);
     }
 }
 
 static void hci_cmd_sync_cancel_work(struct work_struct *work)
 {
     struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
 
     cancel_delayed_work_sync(&hdev->cmd_timer);
     cancel_delayed_work_sync(&hdev->ncmd_timer);
     atomic_set(&hdev->cmd_cnt, 1);
 
     wake_up_interruptible(&hdev->req_wait_q);
 }
 
 void hci_cmd_sync_init(struct hci_dev *hdev)
 {
     INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
     INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
     mutex_init(&hdev->cmd_sync_work_lock);
 
     INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
 }
 
 void hci_cmd_sync_clear(struct hci_dev *hdev)
 {
     struct hci_cmd_sync_work_entry *entry, *tmp;
 
     cancel_work_sync(&hdev->cmd_sync_work);
 
     list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
         if (entry->destroy)
             entry->destroy(hdev, entry->data, -ECANCELED);
 
         list_del(&entry->list);
         kfree(entry);
     }
 }
 
 void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
 {
     bt_dev_dbg(hdev, "err 0x%2.2x", err);
 
     if (hdev->req_status == HCI_REQ_PEND) {
         hdev->req_result = err;
         hdev->req_status = HCI_REQ_CANCELED;
 
         cancel_delayed_work_sync(&hdev->cmd_timer);
         cancel_delayed_work_sync(&hdev->ncmd_timer);
         atomic_set(&hdev->cmd_cnt, 1);
 
         wake_up_interruptible(&hdev->req_wait_q);
     }
 }
 
 void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
 {
     bt_dev_dbg(hdev, "err 0x%2.2x", err);
 
     if (hdev->req_status == HCI_REQ_PEND) {
         hdev->req_result = err;
         hdev->req_status = HCI_REQ_CANCELED;
 
         queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
     }
 }
 EXPORT_SYMBOL(hci_cmd_sync_cancel);
 
 int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
                void *data, hci_cmd_sync_work_destroy_t destroy)
 {
     struct hci_cmd_sync_work_entry *entry;
 
     if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
         return -ENODEV;
 
     entry = kmalloc(sizeof(*entry), GFP_KERNEL);
     if (!entry)
         return -ENOMEM;
 
     entry->func = func;
     entry->data = data;
     entry->destroy = destroy;
 
     mutex_lock(&hdev->cmd_sync_work_lock);
     list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
     mutex_unlock(&hdev->cmd_sync_work_lock);
 
     queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
 
     return 0;
 }
 EXPORT_SYMBOL(hci_cmd_sync_queue);
 
 int hci_update_eir_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_eir cp;
 
     bt_dev_dbg(hdev, "");
 
     if (!hdev_is_powered(hdev))
         return 0;
 
     if (!lmp_ext_inq_capable(hdev))
         return 0;
 
     if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
         return 0;
 
     if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     eir_create(hdev, cp.data);
 
     if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
         return 0;
 
     memcpy(hdev->eir, cp.data, sizeof(cp.data));
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
                      HCI_CMD_TIMEOUT);
 }
 
 static u8 get_service_classes(struct hci_dev *hdev)
 {
     struct bt_uuid *uuid;
     u8 val = 0;
 
     list_for_each_entry(uuid, &hdev->uuids, list)
         val |= uuid->svc_hint;
 
     return val;
 }
 
 int hci_update_class_sync(struct hci_dev *hdev)
 {
     u8 cod[3];
 
     bt_dev_dbg(hdev, "");
 
     if (!hdev_is_powered(hdev))
         return 0;
 
     if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
         return 0;
 
     if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
         return 0;
 
     cod[0] = hdev->minor_class;
     cod[1] = hdev->major_class;
     cod[2] = get_service_classes(hdev);
 
     if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
         cod[1] |= 0x20;
 
     if (memcmp(cod, hdev->dev_class, 3) == 0)
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
                      sizeof(cod), cod, HCI_CMD_TIMEOUT);
 }
 
 static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
 {
     /* If there is no connection we are OK to advertise. */
     if (hci_conn_num(hdev, LE_LINK) == 0)
         return true;
 
     /* Check le_states if there is any connection in peripheral role. */
     if (hdev->conn_hash.le_num_peripheral > 0) {
         /* Peripheral connection state and non connectable mode
          * bit 20.
          */
         if (!connectable && !(hdev->le_states[2] & 0x10))
             return false;
 
         /* Peripheral connection state and connectable mode bit 38
          * and scannable bit 21.
          */
         if (connectable && (!(hdev->le_states[4] & 0x40) ||
                     !(hdev->le_states[2] & 0x20)))
             return false;
     }
 
     /* Check le_states if there is any connection in central role. */
     if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
         /* Central connection state and non connectable mode bit 18. */
         if (!connectable && !(hdev->le_states[2] & 0x02))
             return false;
 
         /* Central connection state and connectable mode bit 35 and
          * scannable 19.
          */
         if (connectable && (!(hdev->le_states[4] & 0x08) ||
                     !(hdev->le_states[2] & 0x08)))
             return false;
     }
 
     return true;
 }
 
 static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
 {
     /* If privacy is not enabled don't use RPA */
     if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
         return false;
 
     /* If basic privacy mode is enabled use RPA */
     if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
         return true;
 
     /* If limited privacy mode is enabled don't use RPA if we're
      * both discoverable and bondable.
      */
     if ((flags & MGMT_ADV_FLAG_DISCOV) &&
         hci_dev_test_flag(hdev, HCI_BONDABLE))
         return false;
 
     /* We're neither bondable nor discoverable in the limited
      * privacy mode, therefore use RPA.
      */
     return true;
 }
 
 static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
 {
     /* If we're advertising or initiating an LE connection we can't
      * go ahead and change the random address at this time. This is
      * because the eventual initiator address used for the
      * subsequently created connection will be undefined (some
      * controllers use the new address and others the one we had
      * when the operation started).
      *
      * In this kind of scenario skip the update and let the random
      * address be updated at the next cycle.
      */
     if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
         hci_lookup_le_connect(hdev)) {
         bt_dev_dbg(hdev, "Deferring random address update");
         hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
         return 0;
     }
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
                      6, rpa, HCI_CMD_TIMEOUT);
 }
 
 int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
                    bool rpa, u8 *own_addr_type)
 {
     int err;
 
     /* If privacy is enabled use a resolvable private address. If
      * current RPA has expired or there is something else than
      * the current RPA in use, then generate a new one.
      */
     if (rpa) {
         /* If Controller supports LL Privacy use own address type is
          * 0x03
          */
         if (use_ll_privacy(hdev))
             *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
         else
             *own_addr_type = ADDR_LE_DEV_RANDOM;
 
         /* Check if RPA is valid */
         if (rpa_valid(hdev))
             return 0;
 
         err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
         if (err < 0) {
             bt_dev_err(hdev, "failed to generate new RPA");
             return err;
         }
 
         err = hci_set_random_addr_sync(hdev, &hdev->rpa);
         if (err)
             return err;
 
         return 0;
     }
 
     /* In case of required privacy without resolvable private address,
      * use an non-resolvable private address. This is useful for active
      * scanning and non-connectable advertising.
      */
     if (require_privacy) {
         bdaddr_t nrpa;
 
         while (true) {
             /* The non-resolvable private address is generated
              * from random six bytes with the two most significant
              * bits cleared.
              */
             get_random_bytes(&nrpa, 6);
             nrpa.b[5] &= 0x3f;
 
             /* The non-resolvable private address shall not be
              * equal to the public address.
              */
             if (bacmp(&hdev->bdaddr, &nrpa))
                 break;
         }
 
         *own_addr_type = ADDR_LE_DEV_RANDOM;
 
         return hci_set_random_addr_sync(hdev, &nrpa);
     }
 
     /* If forcing static address is in use or there is no public
      * address use the static address as random address (but skip
      * the HCI command if the current random address is already the
      * static one.
      *
      * In case BR/EDR has been disabled on a dual-mode controller
      * and a static address has been configured, then use that
      * address instead of the public BR/EDR address.
      */
     if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
         !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
         (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
          bacmp(&hdev->static_addr, BDADDR_ANY))) {
         *own_addr_type = ADDR_LE_DEV_RANDOM;
         if (bacmp(&hdev->static_addr, &hdev->random_addr))
             return hci_set_random_addr_sync(hdev,
                             &hdev->static_addr);
         return 0;
     }
 
     /* Neither privacy nor static address is being used so use a
      * public address.
      */
     *own_addr_type = ADDR_LE_DEV_PUBLIC;
 
     return 0;
 }
 
 static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_ext_adv_enable *cp;
     struct hci_cp_ext_adv_set *set;
     u8 data[sizeof(*cp) + sizeof(*set) * 1];
     u8 size;
 
     /* If request specifies an instance that doesn't exist, fail */
     if (instance > 0) {
         struct adv_info *adv;
 
         adv = hci_find_adv_instance(hdev, instance);
         if (!adv)
             return -EINVAL;
 
         /* If not enabled there is nothing to do */
         if (!adv->enabled)
             return 0;
     }
 
     memset(data, 0, sizeof(data));
 
     cp = (void *)data;
     set = (void *)cp->data;
 
     /* Instance 0x00 indicates all advertising instances will be disabled */
     cp->num_of_sets = !!instance;
     cp->enable = 0x00;
 
     set->handle = instance;
 
     size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
                      size, data, HCI_CMD_TIMEOUT);
 }
 
 static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
                         bdaddr_t *random_addr)
 {
     struct hci_cp_le_set_adv_set_rand_addr cp;
     int err;
 
     if (!instance) {
         /* Instance 0x00 doesn't have an adv_info, instead it uses
          * hdev->random_addr to track its address so whenever it needs
          * to be updated this also set the random address since
          * hdev->random_addr is shared with scan state machine.
          */
         err = hci_set_random_addr_sync(hdev, random_addr);
         if (err)
             return err;
     }
 
     memset(&cp, 0, sizeof(cp));
 
     cp.handle = instance;
     bacpy(&cp.bdaddr, random_addr);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_ext_adv_params cp;
     bool connectable;
     u32 flags;
     bdaddr_t random_addr;
     u8 own_addr_type;
     int err;
     struct adv_info *adv;
     bool secondary_adv;
 
     if (instance > 0) {
         adv = hci_find_adv_instance(hdev, instance);
         if (!adv)
             return -EINVAL;
     } else {
         adv = NULL;
     }
 
     /* Updating parameters of an active instance will return a
      * Command Disallowed error, so we must first disable the
      * instance if it is active.
      */
     if (adv && !adv->pending) {
         err = hci_disable_ext_adv_instance_sync(hdev, instance);
         if (err)
             return err;
     }
 
     flags = hci_adv_instance_flags(hdev, instance);
 
     /* If the "connectable" instance flag was not set, then choose between
      * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
      */
     connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
               mgmt_get_connectable(hdev);
 
     if (!is_advertising_allowed(hdev, connectable))
         return -EPERM;
 
     /* Set require_privacy to true only when non-connectable
      * advertising is used. In that case it is fine to use a
      * non-resolvable private address.
      */
     err = hci_get_random_address(hdev, !connectable,
                      adv_use_rpa(hdev, flags), adv,
                      &own_addr_type, &random_addr);
     if (err < 0)
         return err;
 
     memset(&cp, 0, sizeof(cp));
 
     if (adv) {
         hci_cpu_to_le24(adv->min_interval, cp.min_interval);
         hci_cpu_to_le24(adv->max_interval, cp.max_interval);
         cp.tx_power = adv->tx_power;
     } else {
         hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
         hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
         cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
     }
 
     secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
 
     if (connectable) {
         if (secondary_adv)
             cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
         else
             cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
     } else if (hci_adv_instance_is_scannable(hdev, instance) ||
            (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
         if (secondary_adv)
             cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
         else
             cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
     } else {
         if (secondary_adv)
             cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
         else
             cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
     }
 
     /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
      * contains the peer’s Identity Address and the Peer_Address_Type
      * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
      * These parameters are used to locate the corresponding local IRK in
      * the resolving list; this IRK is used to generate their own address
      * used in the advertisement.
      */
     if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
         hci_copy_identity_address(hdev, &cp.peer_addr,
                       &cp.peer_addr_type);
 
     cp.own_addr_type = own_addr_type;
     cp.channel_map = hdev->le_adv_channel_map;
     cp.handle = instance;
 
     if (flags & MGMT_ADV_FLAG_SEC_2M) {
         cp.primary_phy = HCI_ADV_PHY_1M;
         cp.secondary_phy = HCI_ADV_PHY_2M;
     } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
         cp.primary_phy = HCI_ADV_PHY_CODED;
         cp.secondary_phy = HCI_ADV_PHY_CODED;
     } else {
         /* In all other cases use 1M */
         cp.primary_phy = HCI_ADV_PHY_1M;
         cp.secondary_phy = HCI_ADV_PHY_1M;
     }
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
     if (err)
         return err;
 
     if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
          own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
         bacmp(&random_addr, BDADDR_ANY)) {
         /* Check if random address need to be updated */
         if (adv) {
             if (!bacmp(&random_addr, &adv->random_addr))
                 return 0;
         } else {
             if (!bacmp(&random_addr, &hdev->random_addr))
                 return 0;
         }
 
         return hci_set_adv_set_random_addr_sync(hdev, instance,
                             &random_addr);
     }
 
     return 0;
 }
 
 static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
 {
     struct {
         struct hci_cp_le_set_ext_scan_rsp_data cp;
         u8 data[HCI_MAX_EXT_AD_LENGTH];
     } pdu;
     u8 len;
     struct adv_info *adv = NULL;
     int err;
 
     memset(&pdu, 0, sizeof(pdu));
 
     if (instance) {
         adv = hci_find_adv_instance(hdev, instance);
         if (!adv || !adv->scan_rsp_changed)
             return 0;
     }
 
     len = eir_create_scan_rsp(hdev, instance, pdu.data);
 
     pdu.cp.handle = instance;
     pdu.cp.length = len;
     pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
     pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
                     sizeof(pdu.cp) + len, &pdu.cp,
                     HCI_CMD_TIMEOUT);
     if (err)
         return err;
 
     if (adv) {
         adv->scan_rsp_changed = false;
     } else {
         memcpy(hdev->scan_rsp_data, pdu.data, len);
         hdev->scan_rsp_data_len = len;
     }
 
     return 0;
 }
 
 static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_scan_rsp_data cp;
     u8 len;
 
     memset(&cp, 0, sizeof(cp));
 
     len = eir_create_scan_rsp(hdev, instance, cp.data);
 
     if (hdev->scan_rsp_data_len == len &&
         !memcmp(cp.data, hdev->scan_rsp_data, len))
         return 0;
 
     memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
     hdev->scan_rsp_data_len = len;
 
     cp.length = len;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
 {
     if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
         return 0;
 
     if (ext_adv_capable(hdev))
         return hci_set_ext_scan_rsp_data_sync(hdev, instance);
 
     return __hci_set_scan_rsp_data_sync(hdev, instance);
 }
 
 int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_ext_adv_enable *cp;
     struct hci_cp_ext_adv_set *set;
     u8 data[sizeof(*cp) + sizeof(*set) * 1];
     struct adv_info *adv;
 
     if (instance > 0) {
         adv = hci_find_adv_instance(hdev, instance);
         if (!adv)
             return -EINVAL;
         /* If already enabled there is nothing to do */
         if (adv->enabled)
             return 0;
     } else {
         adv = NULL;
     }
 
     cp = (void *)data;
     set = (void *)cp->data;
 
     memset(cp, 0, sizeof(*cp));
 
     cp->enable = 0x01;
     cp->num_of_sets = 0x01;
 
     memset(set, 0, sizeof(*set));
 
     set->handle = instance;
 
     /* Set duration per instance since controller is responsible for
      * scheduling it.
      */
     if (adv && adv->timeout) {
         u16 duration = adv->timeout * MSEC_PER_SEC;
 
         /* Time = N * 10 ms */
         set->duration = cpu_to_le16(duration / 10);
     }
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
                      sizeof(*cp) +
                      sizeof(*set) * cp->num_of_sets,
                      data, HCI_CMD_TIMEOUT);
 }
 
 int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
 {
     int err;
 
     err = hci_setup_ext_adv_instance_sync(hdev, instance);
     if (err)
         return err;
 
     err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
     if (err)
         return err;
 
     return hci_enable_ext_advertising_sync(hdev, instance);
 }
 
 static int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_per_adv_enable cp;
 
     /* If periodic advertising already disabled there is nothing to do. */
     if (!hci_dev_test_flag(hdev, HCI_LE_PER_ADV))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     cp.enable = 0x00;
     cp.handle = instance;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
                        u16 min_interval, u16 max_interval)
 {
     struct hci_cp_le_set_per_adv_params cp;
 
     memset(&cp, 0, sizeof(cp));
 
     if (!min_interval)
         min_interval = DISCOV_LE_PER_ADV_INT_MIN;
 
     if (!max_interval)
         max_interval = DISCOV_LE_PER_ADV_INT_MAX;
 
     cp.handle = instance;
     cp.min_interval = cpu_to_le16(min_interval);
     cp.max_interval = cpu_to_le16(max_interval);
     cp.periodic_properties = 0x0000;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
 {
     struct {
         struct hci_cp_le_set_per_adv_data cp;
         u8 data[HCI_MAX_PER_AD_LENGTH];
     } pdu;
     u8 len;
 
     memset(&pdu, 0, sizeof(pdu));
 
     if (instance) {
         struct adv_info *adv = hci_find_adv_instance(hdev, instance);
 
         if (!adv || !adv->periodic)
             return 0;
     }
 
     len = eir_create_per_adv_data(hdev, instance, pdu.data);
 
     pdu.cp.length = len;
     pdu.cp.handle = instance;
     pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
                      sizeof(pdu.cp) + len, &pdu,
                      HCI_CMD_TIMEOUT);
 }
 
 static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_per_adv_enable cp;
 
     /* If periodic advertising already enabled there is nothing to do. */
     if (hci_dev_test_flag(hdev, HCI_LE_PER_ADV))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     cp.enable = 0x01;
     cp.handle = instance;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 /* Checks if periodic advertising data contains a Basic Announcement and if it
  * does generates a Broadcast ID and add Broadcast Announcement.
  */
 static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
 {
     u8 bid[3];
     u8 ad[4 + 3];
 
     /* Skip if NULL adv as instance 0x00 is used for general purpose
      * advertising so it cannot used for the likes of Broadcast Announcement
      * as it can be overwritten at any point.
      */
     if (!adv)
         return 0;
 
     /* Check if PA data doesn't contains a Basic Audio Announcement then
      * there is nothing to do.
      */
     if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
                   0x1851, NULL))
         return 0;
 
     /* Check if advertising data already has a Broadcast Announcement since
      * the process may want to control the Broadcast ID directly and in that
      * case the kernel shall no interfere.
      */
     if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
                  NULL))
         return 0;
 
     /* Generate Broadcast ID */
     get_random_bytes(bid, sizeof(bid));
     eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
     hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL);
 
     return hci_update_adv_data_sync(hdev, adv->instance);
 }
 
 int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
                u8 *data, u32 flags, u16 min_interval,
                u16 max_interval, u16 sync_interval)
 {
     struct adv_info *adv = NULL;
     int err;
     bool added = false;
 
     hci_disable_per_advertising_sync(hdev, instance);
 
     if (instance) {
         adv = hci_find_adv_instance(hdev, instance);
         /* Create an instance if that could not be found */
         if (!adv) {
             adv = hci_add_per_instance(hdev, instance, flags,
                            data_len, data,
                            sync_interval,
                            sync_interval);
             if (IS_ERR(adv))
                 return PTR_ERR(adv);
             added = true;
         }
     }
 
     /* Only start advertising if instance 0 or if a dedicated instance has
      * been added.
      */
     if (!adv || added) {
         err = hci_start_ext_adv_sync(hdev, instance);
         if (err < 0)
             goto fail;
 
         err = hci_adv_bcast_annoucement(hdev, adv);
         if (err < 0)
             goto fail;
     }
 
     err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
                       max_interval);
     if (err < 0)
         goto fail;
 
     err = hci_set_per_adv_data_sync(hdev, instance);
     if (err < 0)
         goto fail;
 
     err = hci_enable_per_advertising_sync(hdev, instance);
     if (err < 0)
         goto fail;
 
     return 0;
 
 fail:
     if (added)
         hci_remove_adv_instance(hdev, instance);
 
     return err;
 }
 
 static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
 {
     int err;
 
     if (ext_adv_capable(hdev))
         return hci_start_ext_adv_sync(hdev, instance);
 
     err = hci_update_adv_data_sync(hdev, instance);
     if (err)
         return err;
 
     err = hci_update_scan_rsp_data_sync(hdev, instance);
     if (err)
         return err;
 
     return hci_enable_advertising_sync(hdev);
 }
 
 int hci_enable_advertising_sync(struct hci_dev *hdev)
 {
     struct adv_info *adv_instance;
     struct hci_cp_le_set_adv_param cp;
     u8 own_addr_type, enable = 0x01;
     bool connectable;
     u16 adv_min_interval, adv_max_interval;
     u32 flags;
     u8 status;
 
     if (ext_adv_capable(hdev))
         return hci_enable_ext_advertising_sync(hdev,
                                hdev->cur_adv_instance);
 
     flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
     adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
 
     /* If the "connectable" instance flag was not set, then choose between
      * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
      */
     connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
               mgmt_get_connectable(hdev);
 
     if (!is_advertising_allowed(hdev, connectable))
         return -EINVAL;
 
     status = hci_disable_advertising_sync(hdev);
     if (status)
         return status;
 
     /* Clear the HCI_LE_ADV bit temporarily so that the
      * hci_update_random_address knows that it's safe to go ahead
      * and write a new random address. The flag will be set back on
      * as soon as the SET_ADV_ENABLE HCI command completes.
      */
     hci_dev_clear_flag(hdev, HCI_LE_ADV);
 
     /* Set require_privacy to true only when non-connectable
      * advertising is used. In that case it is fine to use a
      * non-resolvable private address.
      */
     status = hci_update_random_address_sync(hdev, !connectable,
                         adv_use_rpa(hdev, flags),
                         &own_addr_type);
     if (status)
         return status;
 
     memset(&cp, 0, sizeof(cp));
 
     if (adv_instance) {
         adv_min_interval = adv_instance->min_interval;
         adv_max_interval = adv_instance->max_interval;
     } else {
         adv_min_interval = hdev->le_adv_min_interval;
         adv_max_interval = hdev->le_adv_max_interval;
     }
 
     if (connectable) {
         cp.type = LE_ADV_IND;
     } else {
         if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
             cp.type = LE_ADV_SCAN_IND;
         else
             cp.type = LE_ADV_NONCONN_IND;
 
         if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
             hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
             adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
             adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
         }
     }
 
     cp.min_interval = cpu_to_le16(adv_min_interval);
     cp.max_interval = cpu_to_le16(adv_max_interval);
     cp.own_address_type = own_addr_type;
     cp.channel_map = hdev->le_adv_channel_map;
 
     status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
                        sizeof(cp), &cp, HCI_CMD_TIMEOUT);
     if (status)
         return status;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
                      sizeof(enable), &enable, HCI_CMD_TIMEOUT);
 }
 
 static int enable_advertising_sync(struct hci_dev *hdev, void *data)
 {
     return hci_enable_advertising_sync(hdev);
 }
 
 int hci_enable_advertising(struct hci_dev *hdev)
 {
     if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
         list_empty(&hdev->adv_instances))
         return 0;
 
     return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
 }
 
 int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
                      struct sock *sk)
 {
     int err;
 
     if (!ext_adv_capable(hdev))
         return 0;
 
     err = hci_disable_ext_adv_instance_sync(hdev, instance);
     if (err)
         return err;
 
     /* If request specifies an instance that doesn't exist, fail */
     if (instance > 0 && !hci_find_adv_instance(hdev, instance))
         return -EINVAL;
 
     return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
                     sizeof(instance), &instance, 0,
                     HCI_CMD_TIMEOUT, sk);
 }
 
 static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
 {
     struct adv_info *adv = data;
     u8 instance = 0;
 
     if (adv)
         instance = adv->instance;
 
     return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
 }
 
 int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
 {
     struct adv_info *adv = NULL;
 
     if (instance) {
         adv = hci_find_adv_instance(hdev, instance);
         if (!adv)
             return -EINVAL;
     }
 
     return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
 }
 
 int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
 {
     struct hci_cp_le_term_big cp;
 
     memset(&cp, 0, sizeof(cp));
     cp.handle = handle;
     cp.reason = reason;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static void cancel_adv_timeout(struct hci_dev *hdev)
 {
     if (hdev->adv_instance_timeout) {
         hdev->adv_instance_timeout = 0;
         cancel_delayed_work(&hdev->adv_instance_expire);
     }
 }
 
 static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
 {
     struct {
         struct hci_cp_le_set_ext_adv_data cp;
         u8 data[HCI_MAX_EXT_AD_LENGTH];
     } pdu;
     u8 len;
     struct adv_info *adv = NULL;
     int err;
 
     memset(&pdu, 0, sizeof(pdu));
 
     if (instance) {
         adv = hci_find_adv_instance(hdev, instance);
         if (!adv || !adv->adv_data_changed)
             return 0;
     }
 
     len = eir_create_adv_data(hdev, instance, pdu.data);
 
     pdu.cp.length = len;
     pdu.cp.handle = instance;
     pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
     pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
                     sizeof(pdu.cp) + len, &pdu.cp,
                     HCI_CMD_TIMEOUT);
     if (err)
         return err;
 
     /* Update data if the command succeed */
     if (adv) {
         adv->adv_data_changed = false;
     } else {
         memcpy(hdev->adv_data, pdu.data, len);
         hdev->adv_data_len = len;
     }
 
     return 0;
 }
 
 static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
 {
     struct hci_cp_le_set_adv_data cp;
     u8 len;
 
     memset(&cp, 0, sizeof(cp));
 
     len = eir_create_adv_data(hdev, instance, cp.data);
 
     /* There's nothing to do if the data hasn't changed */
     if (hdev->adv_data_len == len &&
         memcmp(cp.data, hdev->adv_data, len) == 0)
         return 0;
 
     memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
     hdev->adv_data_len = len;
 
     cp.length = len;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
 {
     if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
         return 0;
 
     if (ext_adv_capable(hdev))
         return hci_set_ext_adv_data_sync(hdev, instance);
 
     return hci_set_adv_data_sync(hdev, instance);
 }
 
 int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
                    bool force)
 {
     struct adv_info *adv = NULL;
     u16 timeout;
 
     if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
         return -EPERM;
 
     if (hdev->adv_instance_timeout)
         return -EBUSY;
 
     adv = hci_find_adv_instance(hdev, instance);
     if (!adv)
         return -ENOENT;
 
     /* A zero timeout means unlimited advertising. As long as there is
      * only one instance, duration should be ignored. We still set a timeout
      * in case further instances are being added later on.
      *
      * If the remaining lifetime of the instance is more than the duration
      * then the timeout corresponds to the duration, otherwise it will be
      * reduced to the remaining instance lifetime.
      */
     if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
         timeout = adv->duration;
     else
         timeout = adv->remaining_time;
 
     /* The remaining time is being reduced unless the instance is being
      * advertised without time limit.
      */
     if (adv->timeout)
         adv->remaining_time = adv->remaining_time - timeout;
 
     /* Only use work for scheduling instances with legacy advertising */
     if (!ext_adv_capable(hdev)) {
         hdev->adv_instance_timeout = timeout;
         queue_delayed_work(hdev->req_workqueue,
                    &hdev->adv_instance_expire,
                    msecs_to_jiffies(timeout * 1000));
     }
 
     /* If we're just re-scheduling the same instance again then do not
      * execute any HCI commands. This happens when a single instance is
      * being advertised.
      */
     if (!force && hdev->cur_adv_instance == instance &&
         hci_dev_test_flag(hdev, HCI_LE_ADV))
         return 0;
 
     hdev->cur_adv_instance = instance;
 
     return hci_start_adv_sync(hdev, instance);
 }
 
 static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
 {
     int err;
 
     if (!ext_adv_capable(hdev))
         return 0;
 
     /* Disable instance 0x00 to disable all instances */
     err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
     if (err)
         return err;
 
     return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
                     0, NULL, 0, HCI_CMD_TIMEOUT, sk);
 }
 
 static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
 {
     struct adv_info *adv, *n;
 
     if (ext_adv_capable(hdev))
         /* Remove all existing sets */
         return hci_clear_adv_sets_sync(hdev, sk);
 
     /* This is safe as long as there is no command send while the lock is
      * held.
      */
     hci_dev_lock(hdev);
 
     /* Cleanup non-ext instances */
     list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
         u8 instance = adv->instance;
         int err;
 
         if (!(force || adv->timeout))
             continue;
 
         err = hci_remove_adv_instance(hdev, instance);
         if (!err)
             mgmt_advertising_removed(sk, hdev, instance);
     }
 
     hci_dev_unlock(hdev);
 
     return 0;
 }
 
 static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
                    struct sock *sk)
 {
     int err;
 
     /* If we use extended advertising, instance has to be removed first. */
     if (ext_adv_capable(hdev))
         return hci_remove_ext_adv_instance_sync(hdev, instance, sk);
 
     /* This is safe as long as there is no command send while the lock is
      * held.
      */
     hci_dev_lock(hdev);
 
     err = hci_remove_adv_instance(hdev, instance);
     if (!err)
         mgmt_advertising_removed(sk, hdev, instance);
 
     hci_dev_unlock(hdev);
 
     return err;
 }
 
 /* For a single instance:
  * - force == true: The instance will be removed even when its remaining
  *   lifetime is not zero.
  * - force == false: the instance will be deactivated but kept stored unless
  *   the remaining lifetime is zero.
  *
  * For instance == 0x00:
  * - force == true: All instances will be removed regardless of their timeout
  *   setting.
  * - force == false: Only instances that have a timeout will be removed.
  */
 int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
                 u8 instance, bool force)
 {
     struct adv_info *next = NULL;
     int err;
 
     /* Cancel any timeout concerning the removed instance(s). */
     if (!instance || hdev->cur_adv_instance == instance)
         cancel_adv_timeout(hdev);
 
     /* Get the next instance to advertise BEFORE we remove
      * the current one. This can be the same instance again
      * if there is only one instance.
      */
     if (hdev->cur_adv_instance == instance)
         next = hci_get_next_instance(hdev, instance);
 
     if (!instance) {
         err = hci_clear_adv_sync(hdev, sk, force);
         if (err)
             return err;
     } else {
         struct adv_info *adv = hci_find_adv_instance(hdev, instance);
 
         if (force || (adv && adv->timeout && !adv->remaining_time)) {
             /* Don't advertise a removed instance. */
             if (next && next->instance == instance)
                 next = NULL;
 
             err = hci_remove_adv_sync(hdev, instance, sk);
             if (err)
                 return err;
         }
     }
 
     if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
         return 0;
 
     if (next && !ext_adv_capable(hdev))
         hci_schedule_adv_instance_sync(hdev, next->instance, false);
 
     return 0;
 }
 
 int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
 {
     struct hci_cp_read_rssi cp;
 
     cp.handle = handle;
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
                     sizeof(*cp), cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
 {
     struct hci_cp_read_tx_power cp;
 
     cp.handle = handle;
     cp.type = type;
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_disable_advertising_sync(struct hci_dev *hdev)
 {
     u8 enable = 0x00;
 
     /* If controller is not advertising we are done. */
     if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
         return 0;
 
     if (ext_adv_capable(hdev))
         return hci_disable_ext_adv_instance_sync(hdev, 0x00);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
                      sizeof(enable), &enable, HCI_CMD_TIMEOUT);
 }
 
 static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
                        u8 filter_dup)
 {
     struct hci_cp_le_set_ext_scan_enable cp;
 
     memset(&cp, 0, sizeof(cp));
     cp.enable = val;
     cp.filter_dup = filter_dup;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
                        u8 filter_dup)
 {
     struct hci_cp_le_set_scan_enable cp;
 
     if (use_ext_scan(hdev))
         return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
 
     memset(&cp, 0, sizeof(cp));
     cp.enable = val;
     cp.filter_dup = filter_dup;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
 {
     if (!use_ll_privacy(hdev))
         return 0;
 
     /* If controller is not/already resolving we are done. */
     if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
                      sizeof(val), &val, HCI_CMD_TIMEOUT);
 }
 
 static int hci_scan_disable_sync(struct hci_dev *hdev)
 {
     int err;
 
     /* If controller is not scanning we are done. */
     if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
         return 0;
 
     if (hdev->scanning_paused) {
         bt_dev_dbg(hdev, "Scanning is paused for suspend");
         return 0;
     }
 
     err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
     if (err) {
         bt_dev_err(hdev, "Unable to disable scanning: %d", err);
         return err;
     }
 
     return err;
 }
 
 static bool scan_use_rpa(struct hci_dev *hdev)
 {
     return hci_dev_test_flag(hdev, HCI_PRIVACY);
 }
 
 static void hci_start_interleave_scan(struct hci_dev *hdev)
 {
     hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
     queue_delayed_work(hdev->req_workqueue,
                &hdev->interleave_scan, 0);
 }
 
 static bool is_interleave_scanning(struct hci_dev *hdev)
 {
     return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
 }
 
 static void cancel_interleave_scan(struct hci_dev *hdev)
 {
     bt_dev_dbg(hdev, "cancelling interleave scan");
 
     cancel_delayed_work_sync(&hdev->interleave_scan);
 
     hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
 }
 
 /* Return true if interleave_scan wasn't started until exiting this function,
  * otherwise, return false
  */
 static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
 {
     /* Do interleaved scan only if all of the following are true:
      * - There is at least one ADV monitor
      * - At least one pending LE connection or one device to be scanned for
      * - Monitor offloading is not supported
      * If so, we should alternate between allowlist scan and one without
      * any filters to save power.
      */
     bool use_interleaving = hci_is_adv_monitoring(hdev) &&
                 !(list_empty(&hdev->pend_le_conns) &&
                   list_empty(&hdev->pend_le_reports)) &&
                 hci_get_adv_monitor_offload_ext(hdev) ==
                     HCI_ADV_MONITOR_EXT_NONE;
     bool is_interleaving = is_interleave_scanning(hdev);
 
     if (use_interleaving && !is_interleaving) {
         hci_start_interleave_scan(hdev);
         bt_dev_dbg(hdev, "starting interleave scan");
         return true;
     }
 
     if (!use_interleaving && is_interleaving)
         cancel_interleave_scan(hdev);
 
     return false;
 }
 
 /* Removes connection to resolve list if needed.*/
 static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
                     bdaddr_t *bdaddr, u8 bdaddr_type)
 {
     struct hci_cp_le_del_from_resolv_list cp;
     struct bdaddr_list_with_irk *entry;
 
     if (!use_ll_privacy(hdev))
         return 0;
 
     /* Check if the IRK has been programmed */
     entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
                         bdaddr_type);
     if (!entry)
         return 0;
 
     cp.bdaddr_type = bdaddr_type;
     bacpy(&cp.bdaddr, bdaddr);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
                        bdaddr_t *bdaddr, u8 bdaddr_type)
 {
     struct hci_cp_le_del_from_accept_list cp;
     int err;
 
     /* Check if device is on accept list before removing it */
     if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
         return 0;
 
     cp.bdaddr_type = bdaddr_type;
     bacpy(&cp.bdaddr, bdaddr);
 
     /* Ignore errors when removing from resolving list as that is likely
      * that the device was never added.
      */
     hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
     if (err) {
         bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
         return err;
     }
 
     bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
            cp.bdaddr_type);
 
     return 0;
 }
 
 /* Adds connection to resolve list if needed.
  * Setting params to NULL programs local hdev->irk
  */
 static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
                     struct hci_conn_params *params)
 {
     struct hci_cp_le_add_to_resolv_list cp;
     struct smp_irk *irk;
     struct bdaddr_list_with_irk *entry;
 
     if (!use_ll_privacy(hdev))
         return 0;
 
     /* Attempt to program local identity address, type and irk if params is
      * NULL.
      */
     if (!params) {
         if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
             return 0;
 
         hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
         memcpy(cp.peer_irk, hdev->irk, 16);
         goto done;
     }
 
     irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
     if (!irk)
         return 0;
 
     /* Check if the IK has _not_ been programmed yet. */
     entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
                         &params->addr,
                         params->addr_type);
     if (entry)
         return 0;
 
     cp.bdaddr_type = params->addr_type;
     bacpy(&cp.bdaddr, &params->addr);
     memcpy(cp.peer_irk, irk->val, 16);
 
     /* Default privacy mode is always Network */
     params->privacy_mode = HCI_NETWORK_PRIVACY;
 
 done:
     if (hci_dev_test_flag(hdev, HCI_PRIVACY))
         memcpy(cp.local_irk, hdev->irk, 16);
     else
         memset(cp.local_irk, 0, 16);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 /* Set Device Privacy Mode. */
 static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
                     struct hci_conn_params *params)
 {
     struct hci_cp_le_set_privacy_mode cp;
     struct smp_irk *irk;
 
     /* If device privacy mode has already been set there is nothing to do */
     if (params->privacy_mode == HCI_DEVICE_PRIVACY)
         return 0;
 
     /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
      * indicates that LL Privacy has been enabled and
      * HCI_OP_LE_SET_PRIVACY_MODE is supported.
      */
     if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
         return 0;
 
     irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
     if (!irk)
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     cp.bdaddr_type = irk->addr_type;
     bacpy(&cp.bdaddr, &irk->bdaddr);
     cp.mode = HCI_DEVICE_PRIVACY;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 /* Adds connection to allow list if needed, if the device uses RPA (has IRK)
  * this attempts to program the device in the resolving list as well and
  * properly set the privacy mode.
  */
 static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
                        struct hci_conn_params *params,
                        u8 *num_entries)
 {
     struct hci_cp_le_add_to_accept_list cp;
     int err;
 
     /* During suspend, only wakeable devices can be in acceptlist */
     if (hdev->suspended &&
         !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
         return 0;
 
     /* Select filter policy to accept all advertising */
     if (*num_entries >= hdev->le_accept_list_size)
         return -ENOSPC;
 
     /* Accept list can not be used with RPAs */
     if (!use_ll_privacy(hdev) &&
         hci_find_irk_by_addr(hdev, &params->addr, params->addr_type))
         return -EINVAL;
 
     /* Attempt to program the device in the resolving list first to avoid
      * having to rollback in case it fails since the resolving list is
      * dynamic it can probably be smaller than the accept list.
      */
     err = hci_le_add_resolve_list_sync(hdev, params);
     if (err) {
         bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
         return err;
     }
 
     /* Set Privacy Mode */
     err = hci_le_set_privacy_mode_sync(hdev, params);
     if (err) {
         bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
         return err;
     }
 
     /* Check if already in accept list */
     if (hci_bdaddr_list_lookup(&hdev->le_accept_list, &params->addr,
                    params->addr_type))
         return 0;
 
     *num_entries += 1;
     cp.bdaddr_type = params->addr_type;
     bacpy(&cp.bdaddr, &params->addr);
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
     if (err) {
         bt_dev_err(hdev, "Unable to add to allow list: %d", err);
         /* Rollback the device from the resolving list */
         hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
         return err;
     }
 
     bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
            cp.bdaddr_type);
 
     return 0;
 }
 
 /* This function disables/pause all advertising instances */
 static int hci_pause_advertising_sync(struct hci_dev *hdev)
 {
     int err;
     int old_state;
 
     /* If already been paused there is nothing to do. */
     if (hdev->advertising_paused)
         return 0;
 
     bt_dev_dbg(hdev, "Pausing directed advertising");
 
     /* Stop directed advertising */
     old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
     if (old_state) {
         /* When discoverable timeout triggers, then just make sure
          * the limited discoverable flag is cleared. Even in the case
          * of a timeout triggered from general discoverable, it is
          * safe to unconditionally clear the flag.
          */
         hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
         hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
         hdev->discov_timeout = 0;
     }
 
     bt_dev_dbg(hdev, "Pausing advertising instances");
 
     /* Call to disable any advertisements active on the controller.
      * This will succeed even if no advertisements are configured.
      */
     err = hci_disable_advertising_sync(hdev);
     if (err)
         return err;
 
     /* If we are using software rotation, pause the loop */
     if (!ext_adv_capable(hdev))
         cancel_adv_timeout(hdev);
 
     hdev->advertising_paused = true;
     hdev->advertising_old_state = old_state;
 
     return 0;
 }
 
 /* This function enables all user advertising instances */
 static int hci_resume_advertising_sync(struct hci_dev *hdev)
 {
     struct adv_info *adv, *tmp;
     int err;
 
     /* If advertising has not been paused there is nothing  to do. */
     if (!hdev->advertising_paused)
         return 0;
 
     /* Resume directed advertising */
     hdev->advertising_paused = false;
     if (hdev->advertising_old_state) {
         hci_dev_set_flag(hdev, HCI_ADVERTISING);
         hdev->advertising_old_state = 0;
     }
 
     bt_dev_dbg(hdev, "Resuming advertising instances");
 
     if (ext_adv_capable(hdev)) {
         /* Call for each tracked instance to be re-enabled */
         list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
             err = hci_enable_ext_advertising_sync(hdev,
                                   adv->instance);
             if (!err)
                 continue;
 
             /* If the instance cannot be resumed remove it */
             hci_remove_ext_adv_instance_sync(hdev, adv->instance,
                              NULL);
         }
     } else {
         /* Schedule for most recent instance to be restarted and begin
          * the software rotation loop
          */
         err = hci_schedule_adv_instance_sync(hdev,
                              hdev->cur_adv_instance,
                              true);
     }
 
     hdev->advertising_paused = false;
 
     return err;
 }
 
 struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
                          bool extended, struct sock *sk)
 {
     u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
                     HCI_OP_READ_LOCAL_OOB_DATA;
 
     return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
 }
 
 /* Device must not be scanning when updating the accept list.
  *
  * Update is done using the following sequence:
  *
  * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
  * Remove Devices From Accept List ->
  * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
  * Add Devices to Accept List ->
  * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
  * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
  * Enable Scanning
  *
  * In case of failure advertising shall be restored to its original state and
  * return would disable accept list since either accept or resolving list could
  * not be programmed.
  *
  */
 static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
 {
     struct hci_conn_params *params;
     struct bdaddr_list *b, *t;
     u8 num_entries = 0;
     bool pend_conn, pend_report;
     u8 filter_policy;
     int err;
 
     /* Pause advertising if resolving list can be used as controllers are
      * cannot accept resolving list modifications while advertising.
      */
     if (use_ll_privacy(hdev)) {
         err = hci_pause_advertising_sync(hdev);
         if (err) {
             bt_dev_err(hdev, "pause advertising failed: %d", err);
             return 0x00;
         }
     }
 
     /* Disable address resolution while reprogramming accept list since
      * devices that do have an IRK will be programmed in the resolving list
      * when LL Privacy is enabled.
      */
     err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
     if (err) {
         bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
         goto done;
     }
 
     /* Go through the current accept list programmed into the
      * controller one by one and check if that address is connected or is
      * still in the list of pending connections or list of devices to
      * report. If not present in either list, then remove it from
      * the controller.
      */
     list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
         if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type))
             continue;
 
         pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
                               &b->bdaddr,
                               b->bdaddr_type);
         pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
                             &b->bdaddr,
                             b->bdaddr_type);
 
         /* If the device is not likely to connect or report,
          * remove it from the acceptlist.
          */
         if (!pend_conn && !pend_report) {
             hci_le_del_accept_list_sync(hdev, &b->bdaddr,
                             b->bdaddr_type);
             continue;
         }
 
         num_entries++;
     }
 
     /* Since all no longer valid accept list entries have been
      * removed, walk through the list of pending connections
      * and ensure that any new device gets programmed into
      * the controller.
      *
      * If the list of the devices is larger than the list of
      * available accept list entries in the controller, then
      * just abort and return filer policy value to not use the
      * accept list.
      */
     list_for_each_entry(params, &hdev->pend_le_conns, action) {
         err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
         if (err)
             goto done;
     }
 
     /* After adding all new pending connections, walk through
      * the list of pending reports and also add these to the
      * accept list if there is still space. Abort if space runs out.
      */
     list_for_each_entry(params, &hdev->pend_le_reports, action) {
         err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
         if (err)
             goto done;
     }
 
     /* Use the allowlist unless the following conditions are all true:
      * - We are not currently suspending
      * - There are 1 or more ADV monitors registered and it's not offloaded
      * - Interleaved scanning is not currently using the allowlist
      */
     if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
         hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
         hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
         err = -EINVAL;
 
 done:
     filter_policy = err ? 0x00 : 0x01;
 
     /* Enable address resolution when LL Privacy is enabled. */
     err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
     if (err)
         bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
 
     /* Resume advertising if it was paused */
     if (use_ll_privacy(hdev))
         hci_resume_advertising_sync(hdev);
 
     /* Select filter policy to use accept list */
     return filter_policy;
 }
 
 /* Returns true if an le connection is in the scanning state */
 static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
 {
     struct hci_conn_hash *h = &hdev->conn_hash;
     struct hci_conn  *c;
 
     rcu_read_lock();
 
     list_for_each_entry_rcu(c, &h->list, list) {
         if (c->type == LE_LINK && c->state == BT_CONNECT &&
             test_bit(HCI_CONN_SCANNING, &c->flags)) {
             rcu_read_unlock();
             return true;
         }
     }
 
     rcu_read_unlock();
 
     return false;
 }
 
 static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
                       u16 interval, u16 window,
                       u8 own_addr_type, u8 filter_policy)
 {
     struct hci_cp_le_set_ext_scan_params *cp;
     struct hci_cp_le_scan_phy_params *phy;
     u8 data[sizeof(*cp) + sizeof(*phy) * 2];
     u8 num_phy = 0;
 
     cp = (void *)data;
     phy = (void *)cp->data;
 
     memset(data, 0, sizeof(data));
 
     cp->own_addr_type = own_addr_type;
     cp->filter_policy = filter_policy;
 
     if (scan_1m(hdev) || scan_2m(hdev)) {
         cp->scanning_phys |= LE_SCAN_PHY_1M;
 
         phy->type = type;
         phy->interval = cpu_to_le16(interval);
         phy->window = cpu_to_le16(window);
 
         num_phy++;
         phy++;
     }
 
     if (scan_coded(hdev)) {
         cp->scanning_phys |= LE_SCAN_PHY_CODED;
 
         phy->type = type;
         phy->interval = cpu_to_le16(interval);
         phy->window = cpu_to_le16(window);
 
         num_phy++;
         phy++;
     }
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
                      sizeof(*cp) + sizeof(*phy) * num_phy,
                      data, HCI_CMD_TIMEOUT);
 }
 
 static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
                       u16 interval, u16 window,
                       u8 own_addr_type, u8 filter_policy)
 {
     struct hci_cp_le_set_scan_param cp;
 
     if (use_ext_scan(hdev))
         return hci_le_set_ext_scan_param_sync(hdev, type, interval,
                               window, own_addr_type,
                               filter_policy);
 
     memset(&cp, 0, sizeof(cp));
     cp.type = type;
     cp.interval = cpu_to_le16(interval);
     cp.window = cpu_to_le16(window);
     cp.own_address_type = own_addr_type;
     cp.filter_policy = filter_policy;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
                    u16 window, u8 own_addr_type, u8 filter_policy,
                    u8 filter_dup)
 {
     int err;
 
     if (hdev->scanning_paused) {
         bt_dev_dbg(hdev, "Scanning is paused for suspend");
         return 0;
     }
 
     err = hci_le_set_scan_param_sync(hdev, type, interval, window,
                      own_addr_type, filter_policy);
     if (err)
         return err;
 
     return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
 }
 
 static int hci_passive_scan_sync(struct hci_dev *hdev)
 {
     u8 own_addr_type;
     u8 filter_policy;
     u16 window, interval;
     int err;
 
     if (hdev->scanning_paused) {
         bt_dev_dbg(hdev, "Scanning is paused for suspend");
         return 0;
     }
 
     err = hci_scan_disable_sync(hdev);
     if (err) {
         bt_dev_err(hdev, "disable scanning failed: %d", err);
         return err;
     }
 
     /* Set require_privacy to false since no SCAN_REQ are send
      * during passive scanning. Not using an non-resolvable address
      * here is important so that peer devices using direct
      * advertising with our address will be correctly reported
      * by the controller.
      */
     if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
                        &own_addr_type))
         return 0;
 
     if (hdev->enable_advmon_interleave_scan &&
         hci_update_interleaved_scan_sync(hdev))
         return 0;
 
     bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
 
     /* Adding or removing entries from the accept list must
      * happen before enabling scanning. The controller does
      * not allow accept list modification while scanning.
      */
     filter_policy = hci_update_accept_list_sync(hdev);
 
     /* When the controller is using random resolvable addresses and
      * with that having LE privacy enabled, then controllers with
      * Extended Scanner Filter Policies support can now enable support
      * for handling directed advertising.
      *
      * So instead of using filter polices 0x00 (no acceptlist)
      * and 0x01 (acceptlist enabled) use the new filter policies
      * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
      */
     if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
         (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
         filter_policy |= 0x02;
 
     if (hdev->suspended) {
         window = hdev->le_scan_window_suspend;
         interval = hdev->le_scan_int_suspend;
     } else if (hci_is_le_conn_scanning(hdev)) {
         window = hdev->le_scan_window_connect;
         interval = hdev->le_scan_int_connect;
     } else if (hci_is_adv_monitoring(hdev)) {
         window = hdev->le_scan_window_adv_monitor;
         interval = hdev->le_scan_int_adv_monitor;
     } else {
         window = hdev->le_scan_window;
         interval = hdev->le_scan_interval;
     }
 
     bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
 
     return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
                    own_addr_type, filter_policy,
                    LE_SCAN_FILTER_DUP_ENABLE);
 }
 
 /* This function controls the passive scanning based on hdev->pend_le_conns
  * list. If there are pending LE connection we start the background scanning,
  * otherwise we stop it in the following sequence:
  *
  * If there are devices to scan:
  *
  * Disable Scanning -> Update Accept List ->
  * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
  * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
  * Enable Scanning
  *
  * Otherwise:
  *
  * Disable Scanning
  */
 int hci_update_passive_scan_sync(struct hci_dev *hdev)
 {
     int err;
 
     if (!test_bit(HCI_UP, &hdev->flags) ||
         test_bit(HCI_INIT, &hdev->flags) ||
         hci_dev_test_flag(hdev, HCI_SETUP) ||
         hci_dev_test_flag(hdev, HCI_CONFIG) ||
         hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
         hci_dev_test_flag(hdev, HCI_UNREGISTER))
         return 0;
 
     /* No point in doing scanning if LE support hasn't been enabled */
     if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
         return 0;
 
     /* If discovery is active don't interfere with it */
     if (hdev->discovery.state != DISCOVERY_STOPPED)
         return 0;
 
     /* Reset RSSI and UUID filters when starting background scanning
      * since these filters are meant for service discovery only.
      *
      * The Start Discovery and Start Service Discovery operations
      * ensure to set proper values for RSSI threshold and UUID
      * filter list. So it is safe to just reset them here.
      */
     hci_discovery_filter_clear(hdev);
 
     bt_dev_dbg(hdev, "ADV monitoring is %s",
            hci_is_adv_monitoring(hdev) ? "on" : "off");
 
     if (list_empty(&hdev->pend_le_conns) &&
         list_empty(&hdev->pend_le_reports) &&
         !hci_is_adv_monitoring(hdev) &&
         !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
         /* If there is no pending LE connections or devices
          * to be scanned for or no ADV monitors, we should stop the
          * background scanning.
          */
 
         bt_dev_dbg(hdev, "stopping background scanning");
 
         err = hci_scan_disable_sync(hdev);
         if (err)
             bt_dev_err(hdev, "stop background scanning failed: %d",
                    err);
     } else {
         /* If there is at least one pending LE connection, we should
          * keep the background scan running.
          */
 
         /* If controller is connecting, we should not start scanning
          * since some controllers are not able to scan and connect at
          * the same time.
          */
         if (hci_lookup_le_connect(hdev))
             return 0;
 
         bt_dev_dbg(hdev, "start background scanning");
 
         err = hci_passive_scan_sync(hdev);
         if (err)
             bt_dev_err(hdev, "start background scanning failed: %d",
                    err);
     }
 
     return err;
 }
 
 static int update_scan_sync(struct hci_dev *hdev, void *data)
 {
     return hci_update_scan_sync(hdev);
 }
 
 int hci_update_scan(struct hci_dev *hdev)
 {
     return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
 }
 
 static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
 {
     return hci_update_passive_scan_sync(hdev);
 }
 
 int hci_update_passive_scan(struct hci_dev *hdev)
 {
     /* Only queue if it would have any effect */
     if (!test_bit(HCI_UP, &hdev->flags) ||
         test_bit(HCI_INIT, &hdev->flags) ||
         hci_dev_test_flag(hdev, HCI_SETUP) ||
         hci_dev_test_flag(hdev, HCI_CONFIG) ||
         hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
         hci_dev_test_flag(hdev, HCI_UNREGISTER))
         return 0;
 
     return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL);
 }
 
 int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
 {
     int err;
 
     if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
         return 0;
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
                     sizeof(val), &val, HCI_CMD_TIMEOUT);
 
     if (!err) {
         if (val) {
             hdev->features[1][0] |= LMP_HOST_SC;
             hci_dev_set_flag(hdev, HCI_SC_ENABLED);
         } else {
             hdev->features[1][0] &= ~LMP_HOST_SC;
             hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
         }
     }
 
     return err;
 }
 
 int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
 {
     int err;
 
     if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
         lmp_host_ssp_capable(hdev))
         return 0;
 
     if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
         __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
                       sizeof(mode), &mode, HCI_CMD_TIMEOUT);
     }
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
                     sizeof(mode), &mode, HCI_CMD_TIMEOUT);
     if (err)
         return err;
 
     return hci_write_sc_support_sync(hdev, 0x01);
 }
 
 int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
 {
     struct hci_cp_write_le_host_supported cp;
 
     if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
         !lmp_bredr_capable(hdev))
         return 0;
 
     /* Check first if we already have the right host state
      * (host features set)
      */
     if (le == lmp_host_le_capable(hdev) &&
         simul == lmp_host_le_br_capable(hdev))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     cp.le = le;
     cp.simul = simul;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_powered_update_adv_sync(struct hci_dev *hdev)
 {
     struct adv_info *adv, *tmp;
     int err;
 
     if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
         return 0;
 
     /* If RPA Resolution has not been enable yet it means the
      * resolving list is empty and we should attempt to program the
      * local IRK in order to support using own_addr_type
      * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
      */
     if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
         hci_le_add_resolve_list_sync(hdev, NULL);
         hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
     }
 
     /* Make sure the controller has a good default for
      * advertising data. This also applies to the case
      * where BR/EDR was toggled during the AUTO_OFF phase.
      */
     if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
         list_empty(&hdev->adv_instances)) {
         if (ext_adv_capable(hdev)) {
             err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
             if (!err)
                 hci_update_scan_rsp_data_sync(hdev, 0x00);
         } else {
             err = hci_update_adv_data_sync(hdev, 0x00);
             if (!err)
                 hci_update_scan_rsp_data_sync(hdev, 0x00);
         }
 
         if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
             hci_enable_advertising_sync(hdev);
     }
 
     /* Call for each tracked instance to be scheduled */
     list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
         hci_schedule_adv_instance_sync(hdev, adv->instance, true);
 
     return 0;
 }
 
 static int hci_write_auth_enable_sync(struct hci_dev *hdev)
 {
     u8 link_sec;
 
     link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
     if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
                      sizeof(link_sec), &link_sec,
                      HCI_CMD_TIMEOUT);
 }
 
 int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
 {
     struct hci_cp_write_page_scan_activity cp;
     u8 type;
     int err = 0;
 
     if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
         return 0;
 
     if (hdev->hci_ver < BLUETOOTH_VER_1_2)
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     if (enable) {
         type = PAGE_SCAN_TYPE_INTERLACED;
 
         /* 160 msec page scan interval */
         cp.interval = cpu_to_le16(0x0100);
     } else {
         type = hdev->def_page_scan_type;
         cp.interval = cpu_to_le16(hdev->def_page_scan_int);
     }
 
     cp.window = cpu_to_le16(hdev->def_page_scan_window);
 
     if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
         __cpu_to_le16(hdev->page_scan_window) != cp.window) {
         err = __hci_cmd_sync_status(hdev,
                         HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
                         sizeof(cp), &cp, HCI_CMD_TIMEOUT);
         if (err)
             return err;
     }
 
     if (hdev->page_scan_type != type)
         err = __hci_cmd_sync_status(hdev,
                         HCI_OP_WRITE_PAGE_SCAN_TYPE,
                         sizeof(type), &type,
                         HCI_CMD_TIMEOUT);
 
     return err;
 }
 
 static bool disconnected_accept_list_entries(struct hci_dev *hdev)
 {
     struct bdaddr_list *b;
 
     list_for_each_entry(b, &hdev->accept_list, list) {
         struct hci_conn *conn;
 
         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
         if (!conn)
             return true;
 
         if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
             return true;
     }
 
     return false;
 }
 
 static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
                         sizeof(val), &val,
                         HCI_CMD_TIMEOUT);
 }
 
 int hci_update_scan_sync(struct hci_dev *hdev)
 {
     u8 scan;
 
     if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
         return 0;
 
     if (!hdev_is_powered(hdev))
         return 0;
 
     if (mgmt_powering_down(hdev))
         return 0;
 
     if (hdev->scanning_paused)
         return 0;
 
     if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
         disconnected_accept_list_entries(hdev))
         scan = SCAN_PAGE;
     else
         scan = SCAN_DISABLED;
 
     if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
         scan |= SCAN_INQUIRY;
 
     if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
         test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
         return 0;
 
     return hci_write_scan_enable_sync(hdev, scan);
 }
 
 int hci_update_name_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_local_name cp;
 
     memset(&cp, 0, sizeof(cp));
 
     memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
                         sizeof(cp), &cp,
                         HCI_CMD_TIMEOUT);
 }
 
 /* This function perform powered update HCI command sequence after the HCI init
  * sequence which end up resetting all states, the sequence is as follows:
  *
  * HCI_SSP_ENABLED(Enable SSP)
  * HCI_LE_ENABLED(Enable LE)
  * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
  * Update adv data)
  * Enable Authentication
  * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
  * Set Name -> Set EIR)
  */
 int hci_powered_update_sync(struct hci_dev *hdev)
 {
     int err;
 
     /* Register the available SMP channels (BR/EDR and LE) only when
      * successfully powering on the controller. This late
      * registration is required so that LE SMP can clearly decide if
      * the public address or static address is used.
      */
     smp_register(hdev);
 
     err = hci_write_ssp_mode_sync(hdev, 0x01);
     if (err)
         return err;
 
     err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
     if (err)
         return err;
 
     err = hci_powered_update_adv_sync(hdev);
     if (err)
         return err;
 
     err = hci_write_auth_enable_sync(hdev);
     if (err)
         return err;
 
     if (lmp_bredr_capable(hdev)) {
         if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
             hci_write_fast_connectable_sync(hdev, true);
         else
             hci_write_fast_connectable_sync(hdev, false);
         hci_update_scan_sync(hdev);
         hci_update_class_sync(hdev);
         hci_update_name_sync(hdev);
         hci_update_eir_sync(hdev);
     }
 
     return 0;
 }
 
 /**
  * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
  *                     (BD_ADDR) for a HCI device from
  *                     a firmware node property.
  * @hdev:   The HCI device
  *
  * Search the firmware node for 'local-bd-address'.
  *
  * All-zero BD addresses are rejected, because those could be properties
  * that exist in the firmware tables, but were not updated by the firmware. For
  * example, the DTS could define 'local-bd-address', with zero BD addresses.
  */
 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
 {
     struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
     bdaddr_t ba;
     int ret;
 
     ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
                         (u8 *)&ba, sizeof(ba));
     if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
         return;
 
     bacpy(&hdev->public_addr, &ba);
 }
 
 struct hci_init_stage {
     int (*func)(struct hci_dev *hdev);
 };
 
 /* Run init stage NULL terminated function table */
 static int hci_init_stage_sync(struct hci_dev *hdev,
                    const struct hci_init_stage *stage)
 {
     size_t i;
 
     for (i = 0; stage[i].func; i++) {
         int err;
 
         err = stage[i].func(hdev);
         if (err)
             return err;
     }
 
     return 0;
 }
 
 /* Read Local Version */
 static int hci_read_local_version_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read BD Address */
 static int hci_read_bd_addr_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 #define HCI_INIT(_func) \
 { \
     .func = _func, \
 }
 
 static const struct hci_init_stage hci_init0[] = {
     /* HCI_OP_READ_LOCAL_VERSION */
     HCI_INIT(hci_read_local_version_sync),
     /* HCI_OP_READ_BD_ADDR */
     HCI_INIT(hci_read_bd_addr_sync),
     {}
 };
 
 int hci_reset_sync(struct hci_dev *hdev)
 {
     int err;
 
     set_bit(HCI_RESET, &hdev->flags);
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
                     HCI_CMD_TIMEOUT);
     if (err)
         return err;
 
     return 0;
 }
 
 static int hci_init0_sync(struct hci_dev *hdev)
 {
     int err;
 
     bt_dev_dbg(hdev, "");
 
     /* Reset */
     if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
         err = hci_reset_sync(hdev);
         if (err)
             return err;
     }
 
     return hci_init_stage_sync(hdev, hci_init0);
 }
 
 static int hci_unconf_init_sync(struct hci_dev *hdev)
 {
     int err;
 
     if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
         return 0;
 
     err = hci_init0_sync(hdev);
     if (err < 0)
         return err;
 
     if (hci_dev_test_flag(hdev, HCI_SETUP))
         hci_debugfs_create_basic(hdev);
 
     return 0;
 }
 
 /* Read Local Supported Features. */
 static int hci_read_local_features_sync(struct hci_dev *hdev)
 {
      /* Not all AMP controllers support this command */
     if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* BR Controller init stage 1 command sequence */
 static const struct hci_init_stage br_init1[] = {
     /* HCI_OP_READ_LOCAL_FEATURES */
     HCI_INIT(hci_read_local_features_sync),
     /* HCI_OP_READ_LOCAL_VERSION */
     HCI_INIT(hci_read_local_version_sync),
     /* HCI_OP_READ_BD_ADDR */
     HCI_INIT(hci_read_bd_addr_sync),
     {}
 };
 
 /* Read Local Commands */
 static int hci_read_local_cmds_sync(struct hci_dev *hdev)
 {
     /* All Bluetooth 1.2 and later controllers should support the
      * HCI command for reading the local supported commands.
      *
      * Unfortunately some controllers indicate Bluetooth 1.2 support,
      * but do not have support for this command. If that is the case,
      * the driver can quirk the behavior and skip reading the local
      * supported commands.
      */
     if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
         !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
         return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
                          0, NULL, HCI_CMD_TIMEOUT);
 
     return 0;
 }
 
 /* Read Local AMP Info */
 static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Data Blk size */
 static int hci_read_data_block_size_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Flow Control Mode */
 static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Location Data */
 static int hci_read_location_data_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* AMP Controller init stage 1 command sequence */
 static const struct hci_init_stage amp_init1[] = {
     /* HCI_OP_READ_LOCAL_VERSION */
     HCI_INIT(hci_read_local_version_sync),
     /* HCI_OP_READ_LOCAL_COMMANDS */
     HCI_INIT(hci_read_local_cmds_sync),
     /* HCI_OP_READ_LOCAL_AMP_INFO */
     HCI_INIT(hci_read_local_amp_info_sync),
     /* HCI_OP_READ_DATA_BLOCK_SIZE */
     HCI_INIT(hci_read_data_block_size_sync),
     /* HCI_OP_READ_FLOW_CONTROL_MODE */
     HCI_INIT(hci_read_flow_control_mode_sync),
     /* HCI_OP_READ_LOCATION_DATA */
     HCI_INIT(hci_read_location_data_sync),
 };
 
 static int hci_init1_sync(struct hci_dev *hdev)
 {
     int err;
 
     bt_dev_dbg(hdev, "");
 
     /* Reset */
     if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
         err = hci_reset_sync(hdev);
         if (err)
             return err;
     }
 
     switch (hdev->dev_type) {
     case HCI_PRIMARY:
         hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
         return hci_init_stage_sync(hdev, br_init1);
     case HCI_AMP:
         hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
         return hci_init_stage_sync(hdev, amp_init1);
     default:
         bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
         break;
     }
 
     return 0;
 }
 
 /* AMP Controller init stage 2 command sequence */
 static const struct hci_init_stage amp_init2[] = {
     /* HCI_OP_READ_LOCAL_FEATURES */
     HCI_INIT(hci_read_local_features_sync),
 };
 
 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
 static int hci_read_buffer_size_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Class of Device */
 static int hci_read_dev_class_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Local Name */
 static int hci_read_local_name_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Voice Setting */
 static int hci_read_voice_setting_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Number of Supported IAC */
 static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read Current IAC LAP */
 static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
                      u8 cond_type, bdaddr_t *bdaddr,
                      u8 auto_accept)
 {
     struct hci_cp_set_event_filter cp;
 
     if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
         return 0;
 
     if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     cp.flt_type = flt_type;
 
     if (flt_type != HCI_FLT_CLEAR_ALL) {
         cp.cond_type = cond_type;
         bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
         cp.addr_conn_flt.auto_accept = auto_accept;
     }
 
     return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
                      flt_type == HCI_FLT_CLEAR_ALL ?
                      sizeof(cp.flt_type) : sizeof(cp), &cp,
                      HCI_CMD_TIMEOUT);
 }
 
 static int hci_clear_event_filter_sync(struct hci_dev *hdev)
 {
     if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
         return 0;
 
     /* In theory the state machine should not reach here unless
      * a hci_set_event_filter_sync() call succeeds, but we do
      * the check both for parity and as a future reminder.
      */
     if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
         return 0;
 
     return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
                      BDADDR_ANY, 0x00);
 }
 
 /* Connection accept timeout ~20 secs */
 static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
 {
     __le16 param = cpu_to_le16(0x7d00);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
                      sizeof(param), &param, HCI_CMD_TIMEOUT);
 }
 
 /* BR Controller init stage 2 command sequence */
 static const struct hci_init_stage br_init2[] = {
     /* HCI_OP_READ_BUFFER_SIZE */
     HCI_INIT(hci_read_buffer_size_sync),
     /* HCI_OP_READ_CLASS_OF_DEV */
     HCI_INIT(hci_read_dev_class_sync),
     /* HCI_OP_READ_LOCAL_NAME */
     HCI_INIT(hci_read_local_name_sync),
     /* HCI_OP_READ_VOICE_SETTING */
     HCI_INIT(hci_read_voice_setting_sync),
     /* HCI_OP_READ_NUM_SUPPORTED_IAC */
     HCI_INIT(hci_read_num_supported_iac_sync),
     /* HCI_OP_READ_CURRENT_IAC_LAP */
     HCI_INIT(hci_read_current_iac_lap_sync),
     /* HCI_OP_SET_EVENT_FLT */
     HCI_INIT(hci_clear_event_filter_sync),
     /* HCI_OP_WRITE_CA_TIMEOUT */
     HCI_INIT(hci_write_ca_timeout_sync),
     {}
 };
 
 static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
 {
     u8 mode = 0x01;
 
     if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
         return 0;
 
     /* When SSP is available, then the host features page
      * should also be available as well. However some
      * controllers list the max_page as 0 as long as SSP
      * has not been enabled. To achieve proper debugging
      * output, force the minimum max_page to 1 at least.
      */
     hdev->max_page = 0x01;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
                      sizeof(mode), &mode, HCI_CMD_TIMEOUT);
 }
 
 static int hci_write_eir_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_eir cp;
 
     if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
         return 0;
 
     memset(hdev->eir, 0, sizeof(hdev->eir));
     memset(&cp, 0, sizeof(cp));
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
                      HCI_CMD_TIMEOUT);
 }
 
 static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
 {
     u8 mode;
 
     if (!lmp_inq_rssi_capable(hdev) &&
         !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
         return 0;
 
     /* If Extended Inquiry Result events are supported, then
      * they are clearly preferred over Inquiry Result with RSSI
      * events.
      */
     mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
                      sizeof(mode), &mode, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
 {
     if (!lmp_inq_tx_pwr_capable(hdev))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
 {
     struct hci_cp_read_local_ext_features cp;
 
     if (!lmp_ext_feat_capable(hdev))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     cp.page = page;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
 {
     return hci_read_local_ext_features_sync(hdev, 0x01);
 }
 
 /* HCI Controller init stage 2 command sequence */
 static const struct hci_init_stage hci_init2[] = {
     /* HCI_OP_READ_LOCAL_COMMANDS */
     HCI_INIT(hci_read_local_cmds_sync),
     /* HCI_OP_WRITE_SSP_MODE */
     HCI_INIT(hci_write_ssp_mode_1_sync),
     /* HCI_OP_WRITE_EIR */
     HCI_INIT(hci_write_eir_sync),
     /* HCI_OP_WRITE_INQUIRY_MODE */
     HCI_INIT(hci_write_inquiry_mode_sync),
     /* HCI_OP_READ_INQ_RSP_TX_POWER */
     HCI_INIT(hci_read_inq_rsp_tx_power_sync),
     /* HCI_OP_READ_LOCAL_EXT_FEATURES */
     HCI_INIT(hci_read_local_ext_features_1_sync),
     /* HCI_OP_WRITE_AUTH_ENABLE */
     HCI_INIT(hci_write_auth_enable_sync),
     {}
 };
 
 /* Read LE Buffer Size */
 static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
 {
     /* Use Read LE Buffer Size V2 if supported */
     if (hdev->commands[41] & 0x20)
         return __hci_cmd_sync_status(hdev,
                          HCI_OP_LE_READ_BUFFER_SIZE_V2,
                          0, NULL, HCI_CMD_TIMEOUT);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Local Supported Features */
 static int hci_le_read_local_features_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Supported States */
 static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
 {
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* LE Controller init stage 2 command sequence */
 static const struct hci_init_stage le_init2[] = {
     /* HCI_OP_LE_READ_BUFFER_SIZE */
     HCI_INIT(hci_le_read_buffer_size_sync),
     /* HCI_OP_LE_READ_LOCAL_FEATURES */
     HCI_INIT(hci_le_read_local_features_sync),
     /* HCI_OP_LE_READ_SUPPORTED_STATES */
     HCI_INIT(hci_le_read_supported_states_sync),
     {}
 };
 
 static int hci_init2_sync(struct hci_dev *hdev)
 {
     int err;
 
     bt_dev_dbg(hdev, "");
 
     if (hdev->dev_type == HCI_AMP)
         return hci_init_stage_sync(hdev, amp_init2);
 
     err = hci_init_stage_sync(hdev, hci_init2);
     if (err)
         return err;
 
     if (lmp_bredr_capable(hdev)) {
         err = hci_init_stage_sync(hdev, br_init2);
         if (err)
             return err;
     } else {
         hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
     }
 
     if (lmp_le_capable(hdev)) {
         err = hci_init_stage_sync(hdev, le_init2);
         if (err)
             return err;
         /* LE-only controllers have LE implicitly enabled */
         if (!lmp_bredr_capable(hdev))
             hci_dev_set_flag(hdev, HCI_LE_ENABLED);
     }
 
     return 0;
 }
 
 static int hci_set_event_mask_sync(struct hci_dev *hdev)
 {
     /* The second byte is 0xff instead of 0x9f (two reserved bits
      * disabled) since a Broadcom 1.2 dongle doesn't respond to the
      * command otherwise.
      */
     u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
 
     /* CSR 1.1 dongles does not accept any bitfield so don't try to set
      * any event mask for pre 1.2 devices.
      */
     if (hdev->hci_ver < BLUETOOTH_VER_1_2)
         return 0;
 
     if (lmp_bredr_capable(hdev)) {
         events[4] |= 0x01; /* Flow Specification Complete */
 
         /* Don't set Disconnect Complete when suspended as that
          * would wakeup the host when disconnecting due to
          * suspend.
          */
         if (hdev->suspended)
             events[0] &= 0xef;
     } else {
         /* Use a different default for LE-only devices */
         memset(events, 0, sizeof(events));
         events[1] |= 0x20; /* Command Complete */
         events[1] |= 0x40; /* Command Status */
         events[1] |= 0x80; /* Hardware Error */
 
         /* If the controller supports the Disconnect command, enable
          * the corresponding event. In addition enable packet flow
          * control related events.
          */
         if (hdev->commands[0] & 0x20) {
             /* Don't set Disconnect Complete when suspended as that
              * would wakeup the host when disconnecting due to
              * suspend.
              */
             if (!hdev->suspended)
                 events[0] |= 0x10; /* Disconnection Complete */
             events[2] |= 0x04; /* Number of Completed Packets */
             events[3] |= 0x02; /* Data Buffer Overflow */
         }
 
         /* If the controller supports the Read Remote Version
          * Information command, enable the corresponding event.
          */
         if (hdev->commands[2] & 0x80)
             events[1] |= 0x08; /* Read Remote Version Information
                         * Complete
                         */
 
         if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
             events[0] |= 0x80; /* Encryption Change */
             events[5] |= 0x80; /* Encryption Key Refresh Complete */
         }
     }
 
     if (lmp_inq_rssi_capable(hdev) ||
         test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
         events[4] |= 0x02; /* Inquiry Result with RSSI */
 
     if (lmp_ext_feat_capable(hdev))
         events[4] |= 0x04; /* Read Remote Extended Features Complete */
 
     if (lmp_esco_capable(hdev)) {
         events[5] |= 0x08; /* Synchronous Connection Complete */
         events[5] |= 0x10; /* Synchronous Connection Changed */
     }
 
     if (lmp_sniffsubr_capable(hdev))
         events[5] |= 0x20; /* Sniff Subrating */
 
     if (lmp_pause_enc_capable(hdev))
         events[5] |= 0x80; /* Encryption Key Refresh Complete */
 
     if (lmp_ext_inq_capable(hdev))
         events[5] |= 0x40; /* Extended Inquiry Result */
 
     if (lmp_no_flush_capable(hdev))
         events[7] |= 0x01; /* Enhanced Flush Complete */
 
     if (lmp_lsto_capable(hdev))
         events[6] |= 0x80; /* Link Supervision Timeout Changed */
 
     if (lmp_ssp_capable(hdev)) {
         events[6] |= 0x01;  /* IO Capability Request */
         events[6] |= 0x02;  /* IO Capability Response */
         events[6] |= 0x04;  /* User Confirmation Request */
         events[6] |= 0x08;  /* User Passkey Request */
         events[6] |= 0x10;  /* Remote OOB Data Request */
         events[6] |= 0x20;  /* Simple Pairing Complete */
         events[7] |= 0x04;  /* User Passkey Notification */
         events[7] |= 0x08;  /* Keypress Notification */
         events[7] |= 0x10;  /* Remote Host Supported
                      * Features Notification
                      */
     }
 
     if (lmp_le_capable(hdev))
         events[7] |= 0x20;  /* LE Meta-Event */
 
     return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
                      sizeof(events), events, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
 {
     struct hci_cp_read_stored_link_key cp;
 
     if (!(hdev->commands[6] & 0x20) ||
         test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     bacpy(&cp.bdaddr, BDADDR_ANY);
     cp.read_all = 0x01;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_setup_link_policy_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_def_link_policy cp;
     u16 link_policy = 0;
 
     if (!(hdev->commands[5] & 0x10))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     if (lmp_rswitch_capable(hdev))
         link_policy |= HCI_LP_RSWITCH;
     if (lmp_hold_capable(hdev))
         link_policy |= HCI_LP_HOLD;
     if (lmp_sniff_capable(hdev))
         link_policy |= HCI_LP_SNIFF;
     if (lmp_park_capable(hdev))
         link_policy |= HCI_LP_PARK;
 
     cp.policy = cpu_to_le16(link_policy);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[8] & 0x01))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[18] & 0x04) ||
         !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
 {
     /* Some older Broadcom based Bluetooth 1.2 controllers do not
      * support the Read Page Scan Type command. Check support for
      * this command in the bit mask of supported commands.
      */
     if (!(hdev->commands[13] & 0x01))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read features beyond page 1 if available */
 static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
 {
     u8 page;
     int err;
 
     if (!lmp_ext_feat_capable(hdev))
         return 0;
 
     for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
          page++) {
         err = hci_read_local_ext_features_sync(hdev, page);
         if (err)
             return err;
     }
 
     return 0;
 }
 
 /* HCI Controller init stage 3 command sequence */
 static const struct hci_init_stage hci_init3[] = {
     /* HCI_OP_SET_EVENT_MASK */
     HCI_INIT(hci_set_event_mask_sync),
     /* HCI_OP_READ_STORED_LINK_KEY */
     HCI_INIT(hci_read_stored_link_key_sync),
     /* HCI_OP_WRITE_DEF_LINK_POLICY */
     HCI_INIT(hci_setup_link_policy_sync),
     /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
     HCI_INIT(hci_read_page_scan_activity_sync),
     /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
     HCI_INIT(hci_read_def_err_data_reporting_sync),
     /* HCI_OP_READ_PAGE_SCAN_TYPE */
     HCI_INIT(hci_read_page_scan_type_sync),
     /* HCI_OP_READ_LOCAL_EXT_FEATURES */
     HCI_INIT(hci_read_local_ext_features_all_sync),
     {}
 };
 
 static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
 {
     u8 events[8];
 
     if (!lmp_le_capable(hdev))
         return 0;
 
     memset(events, 0, sizeof(events));
 
     if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
         events[0] |= 0x10;  /* LE Long Term Key Request */
 
     /* If controller supports the Connection Parameters Request
      * Link Layer Procedure, enable the corresponding event.
      */
     if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
         /* LE Remote Connection Parameter Request */
         events[0] |= 0x20;
 
     /* If the controller supports the Data Length Extension
      * feature, enable the corresponding event.
      */
     if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
         events[0] |= 0x40;  /* LE Data Length Change */
 
     /* If the controller supports LL Privacy feature or LE Extended Adv,
      * enable the corresponding event.
      */
     if (use_enhanced_conn_complete(hdev))
         events[1] |= 0x02;  /* LE Enhanced Connection Complete */
 
     /* If the controller supports Extended Scanner Filter
      * Policies, enable the corresponding event.
      */
     if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
         events[1] |= 0x04;  /* LE Direct Advertising Report */
 
     /* If the controller supports Channel Selection Algorithm #2
      * feature, enable the corresponding event.
      */
     if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
         events[2] |= 0x08;  /* LE Channel Selection Algorithm */
 
     /* If the controller supports the LE Set Scan Enable command,
      * enable the corresponding advertising report event.
      */
     if (hdev->commands[26] & 0x08)
         events[0] |= 0x02;  /* LE Advertising Report */
 
     /* If the controller supports the LE Create Connection
      * command, enable the corresponding event.
      */
     if (hdev->commands[26] & 0x10)
         events[0] |= 0x01;  /* LE Connection Complete */
 
     /* If the controller supports the LE Connection Update
      * command, enable the corresponding event.
      */
     if (hdev->commands[27] & 0x04)
         events[0] |= 0x04;  /* LE Connection Update Complete */
 
     /* If the controller supports the LE Read Remote Used Features
      * command, enable the corresponding event.
      */
     if (hdev->commands[27] & 0x20)
         /* LE Read Remote Used Features Complete */
         events[0] |= 0x08;
 
     /* If the controller supports the LE Read Local P-256
      * Public Key command, enable the corresponding event.
      */
     if (hdev->commands[34] & 0x02)
         /* LE Read Local P-256 Public Key Complete */
         events[0] |= 0x80;
 
     /* If the controller supports the LE Generate DHKey
      * command, enable the corresponding event.
      */
     if (hdev->commands[34] & 0x04)
         events[1] |= 0x01;  /* LE Generate DHKey Complete */
 
     /* If the controller supports the LE Set Default PHY or
      * LE Set PHY commands, enable the corresponding event.
      */
     if (hdev->commands[35] & (0x20 | 0x40))
         events[1] |= 0x08;        /* LE PHY Update Complete */
 
     /* If the controller supports LE Set Extended Scan Parameters
      * and LE Set Extended Scan Enable commands, enable the
      * corresponding event.
      */
     if (use_ext_scan(hdev))
         events[1] |= 0x10;  /* LE Extended Advertising Report */
 
     /* If the controller supports the LE Extended Advertising
      * command, enable the corresponding event.
      */
     if (ext_adv_capable(hdev))
         events[2] |= 0x02;  /* LE Advertising Set Terminated */
 
     if (cis_capable(hdev)) {
         events[3] |= 0x01;  /* LE CIS Established */
         if (cis_peripheral_capable(hdev))
             events[3] |= 0x02; /* LE CIS Request */
     }
 
     if (bis_capable(hdev)) {
         events[3] |= 0x04;  /* LE Create BIG Complete */
         events[3] |= 0x08;  /* LE Terminate BIG Complete */
         events[3] |= 0x10;  /* LE BIG Sync Established */
         events[3] |= 0x20;  /* LE BIG Sync Loss */
     }
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
                      sizeof(events), events, HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Advertising Channel TX Power */
 static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
 {
     if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
         /* HCI TS spec forbids mixing of legacy and extended
          * advertising commands wherein READ_ADV_TX_POWER is
          * also included. So do not call it if extended adv
          * is supported otherwise controller will return
          * COMMAND_DISALLOWED for extended commands.
          */
         return __hci_cmd_sync_status(hdev,
                            HCI_OP_LE_READ_ADV_TX_POWER,
                            0, NULL, HCI_CMD_TIMEOUT);
     }
 
     return 0;
 }
 
 /* Read LE Min/Max Tx Power*/
 static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[38] & 0x80) ||
         test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Accept List Size */
 static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[26] & 0x40))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Clear LE Accept List */
 static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[26] & 0x80))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Resolving List Size */
 static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[34] & 0x40))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Clear LE Resolving List */
 static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[34] & 0x20))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Set RPA timeout */
 static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
 {
     __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
 
     if (!(hdev->commands[35] & 0x04))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
                      sizeof(timeout), &timeout,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Maximum Data Length */
 static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
 {
     if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Suggested Default Data Length */
 static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
 {
     if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Read LE Number of Supported Advertising Sets */
 static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
 {
     if (!ext_adv_capable(hdev))
         return 0;
 
     return __hci_cmd_sync_status(hdev,
                      HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Write LE Host Supported */
 static int hci_set_le_support_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_le_host_supported cp;
 
     /* LE-only devices do not support explicit enablement */
     if (!lmp_bredr_capable(hdev))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
         cp.le = 0x01;
         cp.simul = 0x00;
     }
 
     if (cp.le == lmp_host_le_capable(hdev))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 /* LE Set Host Feature */
 static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
 {
     struct hci_cp_le_set_host_feature cp;
 
     if (!iso_capable(hdev))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     /* Isochronous Channels (Host Support) */
     cp.bit_number = 32;
     cp.bit_value = 1;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 /* LE Controller init stage 3 command sequence */
 static const struct hci_init_stage le_init3[] = {
     /* HCI_OP_LE_SET_EVENT_MASK */
     HCI_INIT(hci_le_set_event_mask_sync),
     /* HCI_OP_LE_READ_ADV_TX_POWER */
     HCI_INIT(hci_le_read_adv_tx_power_sync),
     /* HCI_OP_LE_READ_TRANSMIT_POWER */
     HCI_INIT(hci_le_read_tx_power_sync),
     /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
     HCI_INIT(hci_le_read_accept_list_size_sync),
     /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
     HCI_INIT(hci_le_clear_accept_list_sync),
     /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
     HCI_INIT(hci_le_read_resolv_list_size_sync),
     /* HCI_OP_LE_CLEAR_RESOLV_LIST */
     HCI_INIT(hci_le_clear_resolv_list_sync),
     /* HCI_OP_LE_SET_RPA_TIMEOUT */
     HCI_INIT(hci_le_set_rpa_timeout_sync),
     /* HCI_OP_LE_READ_MAX_DATA_LEN */
     HCI_INIT(hci_le_read_max_data_len_sync),
     /* HCI_OP_LE_READ_DEF_DATA_LEN */
     HCI_INIT(hci_le_read_def_data_len_sync),
     /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
     HCI_INIT(hci_le_read_num_support_adv_sets_sync),
     /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
     HCI_INIT(hci_set_le_support_sync),
     /* HCI_OP_LE_SET_HOST_FEATURE */
     HCI_INIT(hci_le_set_host_feature_sync),
     {}
 };
 
 static int hci_init3_sync(struct hci_dev *hdev)
 {
     int err;
 
     bt_dev_dbg(hdev, "");
 
     err = hci_init_stage_sync(hdev, hci_init3);
     if (err)
         return err;
 
     if (lmp_le_capable(hdev))
         return hci_init_stage_sync(hdev, le_init3);
 
     return 0;
 }
 
 static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
 {
     struct hci_cp_delete_stored_link_key cp;
 
     /* Some Broadcom based Bluetooth controllers do not support the
      * Delete Stored Link Key command. They are clearly indicating its
      * absence in the bit mask of supported commands.
      *
      * Check the supported commands and only if the command is marked
      * as supported send it. If not supported assume that the controller
      * does not have actual support for stored link keys which makes this
      * command redundant anyway.
      *
      * Some controllers indicate that they support handling deleting
      * stored link keys, but they don't. The quirk lets a driver
      * just disable this command.
      */
     if (!(hdev->commands[6] & 0x80) ||
         test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     bacpy(&cp.bdaddr, BDADDR_ANY);
     cp.delete_all = 0x01;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
 {
     u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
     bool changed = false;
 
     /* Set event mask page 2 if the HCI command for it is supported */
     if (!(hdev->commands[22] & 0x04))
         return 0;
 
     /* If Connectionless Peripheral Broadcast central role is supported
      * enable all necessary events for it.
      */
     if (lmp_cpb_central_capable(hdev)) {
         events[1] |= 0x40;  /* Triggered Clock Capture */
         events[1] |= 0x80;  /* Synchronization Train Complete */
         events[2] |= 0x08;  /* Truncated Page Complete */
         events[2] |= 0x20;  /* CPB Channel Map Change */
         changed = true;
     }
 
     /* If Connectionless Peripheral Broadcast peripheral role is supported
      * enable all necessary events for it.
      */
     if (lmp_cpb_peripheral_capable(hdev)) {
         events[2] |= 0x01;  /* Synchronization Train Received */
         events[2] |= 0x02;  /* CPB Receive */
         events[2] |= 0x04;  /* CPB Timeout */
         events[2] |= 0x10;  /* Peripheral Page Response Timeout */
         changed = true;
     }
 
     /* Enable Authenticated Payload Timeout Expired event if supported */
     if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
         events[2] |= 0x80;
         changed = true;
     }
 
     /* Some Broadcom based controllers indicate support for Set Event
      * Mask Page 2 command, but then actually do not support it. Since
      * the default value is all bits set to zero, the command is only
      * required if the event mask has to be changed. In case no change
      * to the event mask is needed, skip this command.
      */
     if (!changed)
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
                      sizeof(events), events, HCI_CMD_TIMEOUT);
 }
 
 /* Read local codec list if the HCI command is supported */
 static int hci_read_local_codecs_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[29] & 0x20))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Read local pairing options if the HCI command is supported */
 static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[41] & 0x08))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Get MWS transport configuration if the HCI command is supported */
 static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
 {
     if (!(hdev->commands[30] & 0x08))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Check for Synchronization Train support */
 static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
 {
     if (!lmp_sync_train_capable(hdev))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
                      0, NULL, HCI_CMD_TIMEOUT);
 }
 
 /* Enable Secure Connections if supported and configured */
 static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
 {
     u8 support = 0x01;
 
     if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
         !bredr_sc_enabled(hdev))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
                      sizeof(support), &support,
                      HCI_CMD_TIMEOUT);
 }
 
 /* Set erroneous data reporting if supported to the wideband speech
  * setting value
  */
 static int hci_set_err_data_report_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_def_err_data_reporting cp;
     bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
 
     if (!(hdev->commands[18] & 0x08) ||
         !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING))
         return 0;
 
     if (enabled == hdev->err_data_reporting)
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
                 ERR_DATA_REPORTING_DISABLED;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static const struct hci_init_stage hci_init4[] = {
      /* HCI_OP_DELETE_STORED_LINK_KEY */
     HCI_INIT(hci_delete_stored_link_key_sync),
     /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
     HCI_INIT(hci_set_event_mask_page_2_sync),
     /* HCI_OP_READ_LOCAL_CODECS */
     HCI_INIT(hci_read_local_codecs_sync),
      /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
     HCI_INIT(hci_read_local_pairing_opts_sync),
      /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
     HCI_INIT(hci_get_mws_transport_config_sync),
      /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
     HCI_INIT(hci_read_sync_train_params_sync),
     /* HCI_OP_WRITE_SC_SUPPORT */
     HCI_INIT(hci_write_sc_support_1_sync),
     /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
     HCI_INIT(hci_set_err_data_report_sync),
     {}
 };
 
 /* Set Suggested Default Data Length to maximum if supported */
 static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
 {
     struct hci_cp_le_write_def_data_len cp;
 
     if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
     cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 /* Set Default PHY parameters if command is supported */
 static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
 {
     struct hci_cp_le_set_default_phy cp;
 
     if (!(hdev->commands[35] & 0x20))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
     cp.all_phys = 0x00;
     cp.tx_phys = hdev->le_tx_def_phys;
     cp.rx_phys = hdev->le_rx_def_phys;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static const struct hci_init_stage le_init4[] = {
     /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
     HCI_INIT(hci_le_set_write_def_data_len_sync),
     /* HCI_OP_LE_SET_DEFAULT_PHY */
     HCI_INIT(hci_le_set_default_phy_sync),
     {}
 };
 
 static int hci_init4_sync(struct hci_dev *hdev)
 {
     int err;
 
     bt_dev_dbg(hdev, "");
 
     err = hci_init_stage_sync(hdev, hci_init4);
     if (err)
         return err;
 
     if (lmp_le_capable(hdev))
         return hci_init_stage_sync(hdev, le_init4);
 
     return 0;
 }
 
 static int hci_init_sync(struct hci_dev *hdev)
 {
     int err;
 
     err = hci_init1_sync(hdev);
     if (err < 0)
         return err;
 
     if (hci_dev_test_flag(hdev, HCI_SETUP))
         hci_debugfs_create_basic(hdev);
 
     err = hci_init2_sync(hdev);
     if (err < 0)
         return err;
 
     /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
      * BR/EDR/LE type controllers. AMP controllers only need the
      * first two stages of init.
      */
     if (hdev->dev_type != HCI_PRIMARY)
         return 0;
 
     err = hci_init3_sync(hdev);
     if (err < 0)
         return err;
 
     err = hci_init4_sync(hdev);
     if (err < 0)
         return err;
 
     /* This function is only called when the controller is actually in
      * configured state. When the controller is marked as unconfigured,
      * this initialization procedure is not run.
      *
      * It means that it is possible that a controller runs through its
      * setup phase and then discovers missing settings. If that is the
      * case, then this function will not be called. It then will only
      * be called during the config phase.
      *
      * So only when in setup phase or config phase, create the debugfs
      * entries and register the SMP channels.
      */
     if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
         !hci_dev_test_flag(hdev, HCI_CONFIG))
         return 0;
 
     hci_debugfs_create_common(hdev);
 
     if (lmp_bredr_capable(hdev))
         hci_debugfs_create_bredr(hdev);
 
     if (lmp_le_capable(hdev))
         hci_debugfs_create_le(hdev);
 
     return 0;
 }
 
 #define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
 
 static const struct {
     unsigned long quirk;
     const char *desc;
 } hci_broken_table[] = {
     HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
              "HCI Read Local Supported Commands not supported"),
     HCI_QUIRK_BROKEN(STORED_LINK_KEY,
              "HCI Delete Stored Link Key command is advertised, "
              "but not supported."),
     HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
              "HCI Read Transmit Power Level command is advertised, "
              "but not supported."),
     HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
              "HCI Set Event Filter command not supported."),
     HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
              "HCI Enhanced Setup Synchronous Connection command is "
              "advertised, but not supported.")
 };
 
 /* This function handles hdev setup stage:
  *
  * Calls hdev->setup
  * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
  */
 static int hci_dev_setup_sync(struct hci_dev *hdev)
 {
     int ret = 0;
     bool invalid_bdaddr;
     size_t i;
 
     if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
         !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
         return 0;
 
     bt_dev_dbg(hdev, "");
 
     hci_sock_dev_event(hdev, HCI_DEV_SETUP);
 
     if (hdev->setup)
         ret = hdev->setup(hdev);
 
     for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
         if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
             bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
     }
 
     /* The transport driver can set the quirk to mark the
      * BD_ADDR invalid before creating the HCI device or in
      * its setup callback.
      */
     invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
 
     if (!ret) {
         if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
             if (!bacmp(&hdev->public_addr, BDADDR_ANY))
                 hci_dev_get_bd_addr_from_property(hdev);
 
             if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
                 hdev->set_bdaddr) {
                 ret = hdev->set_bdaddr(hdev,
                                &hdev->public_addr);
 
                 /* If setting of the BD_ADDR from the device
                  * property succeeds, then treat the address
                  * as valid even if the invalid BD_ADDR
                  * quirk indicates otherwise.
                  */
                 if (!ret)
                     invalid_bdaddr = false;
             }
         }
     }
 
     /* The transport driver can set these quirks before
      * creating the HCI device or in its setup callback.
      *
      * For the invalid BD_ADDR quirk it is possible that
      * it becomes a valid address if the bootloader does
      * provide it (see above).
      *
      * In case any of them is set, the controller has to
      * start up as unconfigured.
      */
     if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
         invalid_bdaddr)
         hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
 
     /* For an unconfigured controller it is required to
      * read at least the version information provided by
      * the Read Local Version Information command.
      *
      * If the set_bdaddr driver callback is provided, then
      * also the original Bluetooth public device address
      * will be read using the Read BD Address command.
      */
     if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
         return hci_unconf_init_sync(hdev);
 
     return ret;
 }
 
 /* This function handles hdev init stage:
  *
  * Calls hci_dev_setup_sync to perform setup stage
  * Calls hci_init_sync to perform HCI command init sequence
  */
 static int hci_dev_init_sync(struct hci_dev *hdev)
 {
     int ret;
 
     bt_dev_dbg(hdev, "");
 
     atomic_set(&hdev->cmd_cnt, 1);
     set_bit(HCI_INIT, &hdev->flags);
 
     ret = hci_dev_setup_sync(hdev);
 
     if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
         /* If public address change is configured, ensure that
          * the address gets programmed. If the driver does not
          * support changing the public address, fail the power
          * on procedure.
          */
         if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
             hdev->set_bdaddr)
             ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
         else
             ret = -EADDRNOTAVAIL;
     }
 
     if (!ret) {
         if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
             !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
             ret = hci_init_sync(hdev);
             if (!ret && hdev->post_init)
                 ret = hdev->post_init(hdev);
         }
     }
 
     /* If the HCI Reset command is clearing all diagnostic settings,
      * then they need to be reprogrammed after the init procedure
      * completed.
      */
     if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
         !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
         hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
         ret = hdev->set_diag(hdev, true);
 
     if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
         msft_do_open(hdev);
         aosp_do_open(hdev);
     }
 
     clear_bit(HCI_INIT, &hdev->flags);
 
     return ret;
 }
 
 int hci_dev_open_sync(struct hci_dev *hdev)
 {
     int ret;
 
     bt_dev_dbg(hdev, "");
 
     if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
         ret = -ENODEV;
         goto done;
     }
 
     if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
         !hci_dev_test_flag(hdev, HCI_CONFIG)) {
         /* Check for rfkill but allow the HCI setup stage to
          * proceed (which in itself doesn't cause any RF activity).
          */
         if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
             ret = -ERFKILL;
             goto done;
         }
 
         /* Check for valid public address or a configured static
          * random address, but let the HCI setup proceed to
          * be able to determine if there is a public address
          * or not.
          *
          * In case of user channel usage, it is not important
          * if a public address or static random address is
          * available.
          *
          * This check is only valid for BR/EDR controllers
          * since AMP controllers do not have an address.
          */
         if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
             hdev->dev_type == HCI_PRIMARY &&
             !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
             !bacmp(&hdev->static_addr, BDADDR_ANY)) {
             ret = -EADDRNOTAVAIL;
             goto done;
         }
     }
 
     if (test_bit(HCI_UP, &hdev->flags)) {
         ret = -EALREADY;
         goto done;
     }
 
     if (hdev->open(hdev)) {
         ret = -EIO;
         goto done;
     }
 
     set_bit(HCI_RUNNING, &hdev->flags);
     hci_sock_dev_event(hdev, HCI_DEV_OPEN);
 
     ret = hci_dev_init_sync(hdev);
     if (!ret) {
         hci_dev_hold(hdev);
         hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
         hci_adv_instances_set_rpa_expired(hdev, true);
         set_bit(HCI_UP, &hdev->flags);
         hci_sock_dev_event(hdev, HCI_DEV_UP);
         hci_leds_update_powered(hdev, true);
         if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
             !hci_dev_test_flag(hdev, HCI_CONFIG) &&
             !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
             !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
             hci_dev_test_flag(hdev, HCI_MGMT) &&
             hdev->dev_type == HCI_PRIMARY) {
             ret = hci_powered_update_sync(hdev);
         }
     } else {
         /* Init failed, cleanup */
         flush_work(&hdev->tx_work);
 
         /* Since hci_rx_work() is possible to awake new cmd_work
          * it should be flushed first to avoid unexpected call of
          * hci_cmd_work()
          */
         flush_work(&hdev->rx_work);
         flush_work(&hdev->cmd_work);
 
         skb_queue_purge(&hdev->cmd_q);
         skb_queue_purge(&hdev->rx_q);
 
         if (hdev->flush)
             hdev->flush(hdev);
 
         if (hdev->sent_cmd) {
             kfree_skb(hdev->sent_cmd);
             hdev->sent_cmd = NULL;
         }
 
         clear_bit(HCI_RUNNING, &hdev->flags);
         hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
 
         hdev->close(hdev);
         hdev->flags &= BIT(HCI_RAW);
     }
 
 done:
     return ret;
 }
 
 /* This function requires the caller holds hdev->lock */
 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
 {
     struct hci_conn_params *p;
 
     list_for_each_entry(p, &hdev->le_conn_params, list) {
         if (p->conn) {
             hci_conn_drop(p->conn);
             hci_conn_put(p->conn);
             p->conn = NULL;
         }
         list_del_init(&p->action);
     }
 
     BT_DBG("All LE pending actions cleared");
 }
 
 int hci_dev_close_sync(struct hci_dev *hdev)
 {
     bool auto_off;
     int err = 0;
 
     bt_dev_dbg(hdev, "");
 
     cancel_delayed_work(&hdev->power_off);
     cancel_delayed_work(&hdev->ncmd_timer);
 
     hci_request_cancel_all(hdev);
 
     if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
         !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
         test_bit(HCI_UP, &hdev->flags)) {
         /* Execute vendor specific shutdown routine */
         if (hdev->shutdown)
             err = hdev->shutdown(hdev);
     }
 
     if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
         cancel_delayed_work_sync(&hdev->cmd_timer);
         return err;
     }
 
     hci_leds_update_powered(hdev, false);
 
     /* Flush RX and TX works */
     flush_work(&hdev->tx_work);
     flush_work(&hdev->rx_work);
 
     if (hdev->discov_timeout > 0) {
         hdev->discov_timeout = 0;
         hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
         hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
     }
 
     if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
         cancel_delayed_work(&hdev->service_cache);
 
     if (hci_dev_test_flag(hdev, HCI_MGMT)) {
         struct adv_info *adv_instance;
 
         cancel_delayed_work_sync(&hdev->rpa_expired);
 
         list_for_each_entry(adv_instance, &hdev->adv_instances, list)
             cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
     }
 
     /* Avoid potential lockdep warnings from the *_flush() calls by
      * ensuring the workqueue is empty up front.
      */
     drain_workqueue(hdev->workqueue);
 
     hci_dev_lock(hdev);
 
     hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
 
     auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
 
     if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
         !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
         hci_dev_test_flag(hdev, HCI_MGMT))
         __mgmt_power_off(hdev);
 
     hci_inquiry_cache_flush(hdev);
     hci_pend_le_actions_clear(hdev);
     hci_conn_hash_flush(hdev);
     /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
     smp_unregister(hdev);
     hci_dev_unlock(hdev);
 
     hci_sock_dev_event(hdev, HCI_DEV_DOWN);
 
     if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
         aosp_do_close(hdev);
         msft_do_close(hdev);
     }
 
     if (hdev->flush)
         hdev->flush(hdev);
 
     /* Reset device */
     skb_queue_purge(&hdev->cmd_q);
     atomic_set(&hdev->cmd_cnt, 1);
     if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
         !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
         set_bit(HCI_INIT, &hdev->flags);
         hci_reset_sync(hdev);
         clear_bit(HCI_INIT, &hdev->flags);
     }
 
     /* flush cmd  work */
     flush_work(&hdev->cmd_work);
 
     /* Drop queues */
     skb_queue_purge(&hdev->rx_q);
     skb_queue_purge(&hdev->cmd_q);
     skb_queue_purge(&hdev->raw_q);
 
     /* Drop last sent command */
     if (hdev->sent_cmd) {
         cancel_delayed_work_sync(&hdev->cmd_timer);
         kfree_skb(hdev->sent_cmd);
         hdev->sent_cmd = NULL;
     }
 
     clear_bit(HCI_RUNNING, &hdev->flags);
     hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
 
     /* After this point our queues are empty and no tasks are scheduled. */
     hdev->close(hdev);
 
     /* Clear flags */
     hdev->flags &= BIT(HCI_RAW);
     hci_dev_clear_volatile_flags(hdev);
 
     /* Controller radio is available but is currently powered down */
     hdev->amp_status = AMP_STATUS_POWERED_DOWN;
 
     memset(hdev->eir, 0, sizeof(hdev->eir));
     memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
     bacpy(&hdev->random_addr, BDADDR_ANY);
 
     hci_dev_put(hdev);
     return err;
 }
 
 /* This function perform power on HCI command sequence as follows:
  *
  * If controller is already up (HCI_UP) performs hci_powered_update_sync
  * sequence otherwise run hci_dev_open_sync which will follow with
  * hci_powered_update_sync after the init sequence is completed.
  */
 static int hci_power_on_sync(struct hci_dev *hdev)
 {
     int err;
 
     if (test_bit(HCI_UP, &hdev->flags) &&
         hci_dev_test_flag(hdev, HCI_MGMT) &&
         hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
         cancel_delayed_work(&hdev->power_off);
         return hci_powered_update_sync(hdev);
     }
 
     err = hci_dev_open_sync(hdev);
     if (err < 0)
         return err;
 
     /* During the HCI setup phase, a few error conditions are
      * ignored and they need to be checked now. If they are still
      * valid, it is important to return the device back off.
      */
     if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
         hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
         (hdev->dev_type == HCI_PRIMARY &&
          !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
          !bacmp(&hdev->static_addr, BDADDR_ANY))) {
         hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
         hci_dev_close_sync(hdev);
     } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
         queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
                    HCI_AUTO_OFF_TIMEOUT);
     }
 
     if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
         /* For unconfigured devices, set the HCI_RAW flag
          * so that userspace can easily identify them.
          */
         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
             set_bit(HCI_RAW, &hdev->flags);
 
         /* For fully configured devices, this will send
          * the Index Added event. For unconfigured devices,
          * it will send Unconfigued Index Added event.
          *
          * Devices with HCI_QUIRK_RAW_DEVICE are ignored
          * and no event will be send.
          */
         mgmt_index_added(hdev);
     } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
         /* When the controller is now configured, then it
          * is important to clear the HCI_RAW flag.
          */
         if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
             clear_bit(HCI_RAW, &hdev->flags);
 
         /* Powering on the controller with HCI_CONFIG set only
          * happens with the transition from unconfigured to
          * configured. This will send the Index Added event.
          */
         mgmt_index_added(hdev);
     }
 
     return 0;
 }
 
 static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
 {
     struct hci_cp_remote_name_req_cancel cp;
 
     memset(&cp, 0, sizeof(cp));
     bacpy(&cp.bdaddr, addr);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_stop_discovery_sync(struct hci_dev *hdev)
 {
     struct discovery_state *d = &hdev->discovery;
     struct inquiry_entry *e;
     int err;
 
     bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
 
     if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
         if (test_bit(HCI_INQUIRY, &hdev->flags)) {
             err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
                             0, NULL, HCI_CMD_TIMEOUT);
             if (err)
                 return err;
         }
 
         if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
             cancel_delayed_work(&hdev->le_scan_disable);
             cancel_delayed_work(&hdev->le_scan_restart);
 
             err = hci_scan_disable_sync(hdev);
             if (err)
                 return err;
         }
 
     } else {
         err = hci_scan_disable_sync(hdev);
         if (err)
             return err;
     }
 
     /* Resume advertising if it was paused */
     if (use_ll_privacy(hdev))
         hci_resume_advertising_sync(hdev);
 
     /* No further actions needed for LE-only discovery */
     if (d->type == DISCOV_TYPE_LE)
         return 0;
 
     if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
         e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
                              NAME_PENDING);
         if (!e)
             return 0;
 
         return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
     }
 
     return 0;
 }
 
 static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
                     u8 reason)
 {
     struct hci_cp_disconn_phy_link cp;
 
     memset(&cp, 0, sizeof(cp));
     cp.phy_handle = HCI_PHY_HANDLE(handle);
     cp.reason = reason;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
                    u8 reason)
 {
     struct hci_cp_disconnect cp;
 
     if (conn->type == AMP_LINK)
         return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
 
     memset(&cp, 0, sizeof(cp));
     cp.handle = cpu_to_le16(conn->handle);
     cp.reason = reason;
 
     /* Wait for HCI_EV_DISCONN_COMPLETE not HCI_EV_CMD_STATUS when not
      * suspending.
      */
     if (!hdev->suspended)
         return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
                         sizeof(cp), &cp,
                         HCI_EV_DISCONN_COMPLETE,
                         HCI_CMD_TIMEOUT, NULL);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
                      HCI_CMD_TIMEOUT);
 }
 
 static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
                       struct hci_conn *conn)
 {
     if (test_bit(HCI_CONN_SCANNING, &conn->flags))
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
                      6, &conn->dst, HCI_CMD_TIMEOUT);
 }
 
 static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn)
 {
     if (conn->type == LE_LINK)
         return hci_le_connect_cancel_sync(hdev, conn);
 
     if (hdev->hci_ver < BLUETOOTH_VER_1_2)
         return 0;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
                      6, &conn->dst, HCI_CMD_TIMEOUT);
 }
 
 static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
                    u8 reason)
 {
     struct hci_cp_reject_sync_conn_req cp;
 
     memset(&cp, 0, sizeof(cp));
     bacpy(&cp.bdaddr, &conn->dst);
     cp.reason = reason;
 
     /* SCO rejection has its own limited set of
      * allowed error values (0x0D-0x0F).
      */
     if (reason < 0x0d || reason > 0x0f)
         cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
                 u8 reason)
 {
     struct hci_cp_reject_conn_req cp;
 
     if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
         return hci_reject_sco_sync(hdev, conn, reason);
 
     memset(&cp, 0, sizeof(cp));
     bacpy(&cp.bdaddr, &conn->dst);
     cp.reason = reason;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
 {
     int err;
 
     switch (conn->state) {
     case BT_CONNECTED:
     case BT_CONFIG:
         return hci_disconnect_sync(hdev, conn, reason);
     case BT_CONNECT:
         err = hci_connect_cancel_sync(hdev, conn);
         /* Cleanup hci_conn object if it cannot be cancelled as it
          * likelly means the controller and host stack are out of sync.
          */
         if (err) {
             hci_dev_lock(hdev);
             hci_conn_failed(conn, err);
             hci_dev_unlock(hdev);
         }
         return err;
     case BT_CONNECT2:
         return hci_reject_conn_sync(hdev, conn, reason);
     default:
         conn->state = BT_CLOSED;
         break;
     }
 
     return 0;
 }
 
 static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
 {
     struct hci_conn *conn, *tmp;
     int err;
 
     list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
         err = hci_abort_conn_sync(hdev, conn, reason);
         if (err)
             return err;
     }
 
     return 0;
 }
 
 /* This function perform power off HCI command sequence as follows:
  *
  * Clear Advertising
  * Stop Discovery
  * Disconnect all connections
  * hci_dev_close_sync
  */
 static int hci_power_off_sync(struct hci_dev *hdev)
 {
     int err;
 
     /* If controller is already down there is nothing to do */
     if (!test_bit(HCI_UP, &hdev->flags))
         return 0;
 
     if (test_bit(HCI_ISCAN, &hdev->flags) ||
         test_bit(HCI_PSCAN, &hdev->flags)) {
         err = hci_write_scan_enable_sync(hdev, 0x00);
         if (err)
             return err;
     }
 
     err = hci_clear_adv_sync(hdev, NULL, false);
     if (err)
         return err;
 
     err = hci_stop_discovery_sync(hdev);
     if (err)
         return err;
 
     /* Terminated due to Power Off */
     err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
     if (err)
         return err;
 
     return hci_dev_close_sync(hdev);
 }
 
 int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
 {
     if (val)
         return hci_power_on_sync(hdev);
 
     return hci_power_off_sync(hdev);
 }
 
 static int hci_write_iac_sync(struct hci_dev *hdev)
 {
     struct hci_cp_write_current_iac_lap cp;
 
     if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
         return 0;
 
     memset(&cp, 0, sizeof(cp));
 
     if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
         /* Limited discoverable mode */
         cp.num_iac = min_t(u8, hdev->num_iac, 2);
         cp.iac_lap[0] = 0x00;   /* LIAC */
         cp.iac_lap[1] = 0x8b;
         cp.iac_lap[2] = 0x9e;
         cp.iac_lap[3] = 0x33;   /* GIAC */
         cp.iac_lap[4] = 0x8b;
         cp.iac_lap[5] = 0x9e;
     } else {
         /* General discoverable mode */
         cp.num_iac = 1;
         cp.iac_lap[0] = 0x33;   /* GIAC */
         cp.iac_lap[1] = 0x8b;
         cp.iac_lap[2] = 0x9e;
     }
 
     return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
                      (cp.num_iac * 3) + 1, &cp,
                      HCI_CMD_TIMEOUT);
 }
 
 int hci_update_discoverable_sync(struct hci_dev *hdev)
 {
     int err = 0;
 
     if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
         err = hci_write_iac_sync(hdev);
         if (err)
             return err;
 
         err = hci_update_scan_sync(hdev);
         if (err)
             return err;
 
         err = hci_update_class_sync(hdev);
         if (err)
             return err;
     }
 
     /* Advertising instances don't use the global discoverable setting, so
      * only update AD if advertising was enabled using Set Advertising.
      */
     if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
         err = hci_update_adv_data_sync(hdev, 0x00);
         if (err)
             return err;
 
         /* Discoverable mode affects the local advertising
          * address in limited privacy mode.
          */
         if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
             if (ext_adv_capable(hdev))
                 err = hci_start_ext_adv_sync(hdev, 0x00);
             else
                 err = hci_enable_advertising_sync(hdev);
         }
     }
 
     return err;
 }
 
 static int update_discoverable_sync(struct hci_dev *hdev, void *data)
 {
     return hci_update_discoverable_sync(hdev);
 }
 
 int hci_update_discoverable(struct hci_dev *hdev)
 {
     /* Only queue if it would have any effect */
     if (hdev_is_powered(hdev) &&
         hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
         hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
         hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
         return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
                       NULL);
 
     return 0;
 }
 
 int hci_update_connectable_sync(struct hci_dev *hdev)
 {
     int err;
 
     err = hci_update_scan_sync(hdev);
     if (err)
         return err;
 
     /* If BR/EDR is not enabled and we disable advertising as a
      * by-product of disabling connectable, we need to update the
      * advertising flags.
      */
     if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
         err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
 
     /* Update the advertising parameters if necessary */
     if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
         !list_empty(&hdev->adv_instances)) {
         if (ext_adv_capable(hdev))
             err = hci_start_ext_adv_sync(hdev,
                              hdev->cur_adv_instance);
         else
             err = hci_enable_advertising_sync(hdev);
 
         if (err)
             return err;
     }
 
     return hci_update_passive_scan_sync(hdev);
 }
 
 static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
 {
     const u8 giac[3] = { 0x33, 0x8b, 0x9e };
     const u8 liac[3] = { 0x00, 0x8b, 0x9e };
     struct hci_cp_inquiry cp;
 
     bt_dev_dbg(hdev, "");
 
     if (hci_dev_test_flag(hdev, HCI_INQUIRY))
         return 0;
 
     hci_dev_lock(hdev);
     hci_inquiry_cache_flush(hdev);
     hci_dev_unlock(hdev);
 
     memset(&cp, 0, sizeof(cp));
 
     if (hdev->discovery.limited)
         memcpy(&cp.lap, liac, sizeof(cp.lap));
     else
         memcpy(&cp.lap, giac, sizeof(cp.lap));
 
     cp.length = length;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
 {
     u8 own_addr_type;
     /* Accept list is not used for discovery */
     u8 filter_policy = 0x00;
     /* Default is to enable duplicates filter */
     u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
     int err;
 
     bt_dev_dbg(hdev, "");
 
     /* If controller is scanning, it means the passive scanning is
      * running. Thus, we should temporarily stop it in order to set the
      * discovery scanning parameters.
      */
     err = hci_scan_disable_sync(hdev);
     if (err) {
         bt_dev_err(hdev, "Unable to disable scanning: %d", err);
         return err;
     }
 
     cancel_interleave_scan(hdev);
 
     /* Pause advertising since active scanning disables address resolution
      * which advertising depend on in order to generate its RPAs.
      */
     if (use_ll_privacy(hdev)) {
         err = hci_pause_advertising_sync(hdev);
         if (err) {
             bt_dev_err(hdev, "pause advertising failed: %d", err);
             goto failed;
         }
     }
 
     /* Disable address resolution while doing active scanning since the
      * accept list shall not be used and all reports shall reach the host
      * anyway.
      */
     err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
     if (err) {
         bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
                err);
         goto failed;
     }
 
     /* All active scans will be done with either a resolvable private
      * address (when privacy feature has been enabled) or non-resolvable
      * private address.
      */
     err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
                          &own_addr_type);
     if (err < 0)
         own_addr_type = ADDR_LE_DEV_PUBLIC;
 
     if (hci_is_adv_monitoring(hdev)) {
         /* Duplicate filter should be disabled when some advertisement
          * monitor is activated, otherwise AdvMon can only receive one
          * advertisement for one peer(*) during active scanning, and
          * might report loss to these peers.
          *
          * Note that different controllers have different meanings of
          * |duplicate|. Some of them consider packets with the same
          * address as duplicate, and others consider packets with the
          * same address and the same RSSI as duplicate. Although in the
          * latter case we don't need to disable duplicate filter, but
          * it is common to have active scanning for a short period of
          * time, the power impact should be neglectable.
          */
         filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
     }
 
     err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
                   hdev->le_scan_window_discovery,
                   own_addr_type, filter_policy, filter_dup);
     if (!err)
         return err;
 
 failed:
     /* Resume advertising if it was paused */
     if (use_ll_privacy(hdev))
         hci_resume_advertising_sync(hdev);
 
     /* Resume passive scanning */
     hci_update_passive_scan_sync(hdev);
     return err;
 }
 
 static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
 {
     int err;
 
     bt_dev_dbg(hdev, "");
 
     err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
     if (err)
         return err;
 
     return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
 }
 
 int hci_start_discovery_sync(struct hci_dev *hdev)
 {
     unsigned long timeout;
     int err;
 
     bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
 
     switch (hdev->discovery.type) {
     case DISCOV_TYPE_BREDR:
         return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
     case DISCOV_TYPE_INTERLEAVED:
         /* When running simultaneous discovery, the LE scanning time
          * should occupy the whole discovery time sine BR/EDR inquiry
          * and LE scanning are scheduled by the controller.
          *
          * For interleaving discovery in comparison, BR/EDR inquiry
          * and LE scanning are done sequentially with separate
          * timeouts.
          */
         if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
                  &hdev->quirks)) {
             timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
             /* During simultaneous discovery, we double LE scan
              * interval. We must leave some time for the controller
              * to do BR/EDR inquiry.
              */
             err = hci_start_interleaved_discovery_sync(hdev);
             break;
         }
 
         timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
         err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
         break;
     case DISCOV_TYPE_LE:
         timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
         err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
         break;
     default:
         return -EINVAL;
     }
 
     if (err)
         return err;
 
     bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
 
     /* When service discovery is used and the controller has a
      * strict duplicate filter, it is important to remember the
      * start and duration of the scan. This is required for
      * restarting scanning during the discovery phase.
      */
     if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
         hdev->discovery.result_filtering) {
         hdev->discovery.scan_start = jiffies;
         hdev->discovery.scan_duration = timeout;
     }
 
     queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
                timeout);
     return 0;
 }
 
 static void hci_suspend_monitor_sync(struct hci_dev *hdev)
 {
     switch (hci_get_adv_monitor_offload_ext(hdev)) {
     case HCI_ADV_MONITOR_EXT_MSFT:
         msft_suspend_sync(hdev);
         break;
     default:
         return;
     }
 }
 
 /* This function disables discovery and mark it as paused */
 static int hci_pause_discovery_sync(struct hci_dev *hdev)
 {
     int old_state = hdev->discovery.state;
     int err;
 
     /* If discovery already stopped/stopping/paused there nothing to do */
     if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
         hdev->discovery_paused)
         return 0;
 
     hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
     err = hci_stop_discovery_sync(hdev);
     if (err)
         return err;
 
     hdev->discovery_paused = true;
     hdev->discovery_old_state = old_state;
     hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
 
     return 0;
 }
 
 static int hci_update_event_filter_sync(struct hci_dev *hdev)
 {
     struct bdaddr_list_with_flags *b;
     u8 scan = SCAN_DISABLED;
     bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
     int err;
 
     if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
         return 0;
 
     /* Some fake CSR controllers lock up after setting this type of
      * filter, so avoid sending the request altogether.
      */
     if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
         return 0;
 
     /* Always clear event filter when starting */
     hci_clear_event_filter_sync(hdev);
 
     list_for_each_entry(b, &hdev->accept_list, list) {
         if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
             continue;
 
         bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
 
         err =  hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
                          HCI_CONN_SETUP_ALLOW_BDADDR,
                          &b->bdaddr,
                          HCI_CONN_SETUP_AUTO_ON);
         if (err)
             bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
                    &b->bdaddr);
         else
             scan = SCAN_PAGE;
     }
 
     if (scan && !scanning)
         hci_write_scan_enable_sync(hdev, scan);
     else if (!scan && scanning)
         hci_write_scan_enable_sync(hdev, scan);
 
     return 0;
 }
 
 /* This function disables scan (BR and LE) and mark it as paused */
 static int hci_pause_scan_sync(struct hci_dev *hdev)
 {
     if (hdev->scanning_paused)
         return 0;
 
     /* Disable page scan if enabled */
     if (test_bit(HCI_PSCAN, &hdev->flags))
         hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
 
     hci_scan_disable_sync(hdev);
 
     hdev->scanning_paused = true;
 
     return 0;
 }
 
 /* This function performs the HCI suspend procedures in the follow order:
  *
  * Pause discovery (active scanning/inquiry)
  * Pause Directed Advertising/Advertising
  * Pause Scanning (passive scanning in case discovery was not active)
  * Disconnect all connections
  * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
  * otherwise:
  * Update event mask (only set events that are allowed to wake up the host)
  * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
  * Update passive scanning (lower duty cycle)
  * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
  */
 int hci_suspend_sync(struct hci_dev *hdev)
 {
     int err;
 
     /* If marked as suspended there nothing to do */
     if (hdev->suspended)
         return 0;
 
     /* Mark device as suspended */
     hdev->suspended = true;
 
     /* Pause discovery if not already stopped */
     hci_pause_discovery_sync(hdev);
 
     /* Pause other advertisements */
     hci_pause_advertising_sync(hdev);
 
     /* Suspend monitor filters */
     hci_suspend_monitor_sync(hdev);
 
     /* Prevent disconnects from causing scanning to be re-enabled */
     hci_pause_scan_sync(hdev);
 
     if (hci_conn_count(hdev)) {
         /* Soft disconnect everything (power off) */
         err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
         if (err) {
             /* Set state to BT_RUNNING so resume doesn't notify */
             hdev->suspend_state = BT_RUNNING;
             hci_resume_sync(hdev);
             return err;
         }
 
         /* Update event mask so only the allowed event can wakeup the
          * host.
          */
         hci_set_event_mask_sync(hdev);
     }
 
     /* Only configure accept list if disconnect succeeded and wake
      * isn't being prevented.
      */
     if (!hdev->wakeup || !hdev->wakeup(hdev)) {
         hdev->suspend_state = BT_SUSPEND_DISCONNECT;
         return 0;
     }
 
     /* Unpause to take care of updating scanning params */
     hdev->scanning_paused = false;
 
     /* Enable event filter for paired devices */
     hci_update_event_filter_sync(hdev);
 
     /* Update LE passive scan if enabled */
     hci_update_passive_scan_sync(hdev);
 
     /* Pause scan changes again. */
     hdev->scanning_paused = true;
 
     hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
 
     return 0;
 }
 
 /* This function resumes discovery */
 static int hci_resume_discovery_sync(struct hci_dev *hdev)
 {
     int err;
 
     /* If discovery not paused there nothing to do */
     if (!hdev->discovery_paused)
         return 0;
 
     hdev->discovery_paused = false;
 
     hci_discovery_set_state(hdev, DISCOVERY_STARTING);
 
     err = hci_start_discovery_sync(hdev);
 
     hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
                 DISCOVERY_FINDING);
 
     return err;
 }
 
 static void hci_resume_monitor_sync(struct hci_dev *hdev)
 {
     switch (hci_get_adv_monitor_offload_ext(hdev)) {
     case HCI_ADV_MONITOR_EXT_MSFT:
         msft_resume_sync(hdev);
         break;
     default:
         return;
     }
 }
 
 /* This function resume scan and reset paused flag */
 static int hci_resume_scan_sync(struct hci_dev *hdev)
 {
     if (!hdev->scanning_paused)
         return 0;
 
     hdev->scanning_paused = false;
 
     hci_update_scan_sync(hdev);
 
     /* Reset passive scanning to normal */
     hci_update_passive_scan_sync(hdev);
 
     return 0;
 }
 
 /* This function performs the HCI suspend procedures in the follow order:
  *
  * Restore event mask
  * Clear event filter
  * Update passive scanning (normal duty cycle)
  * Resume Directed Advertising/Advertising
  * Resume discovery (active scanning/inquiry)
  */
 int hci_resume_sync(struct hci_dev *hdev)
 {
     /* If not marked as suspended there nothing to do */
     if (!hdev->suspended)
         return 0;
 
     hdev->suspended = false;
 
     /* Restore event mask */
     hci_set_event_mask_sync(hdev);
 
     /* Clear any event filters and restore scan state */
     hci_clear_event_filter_sync(hdev);
 
     /* Resume scanning */
     hci_resume_scan_sync(hdev);
 
     /* Resume monitor filters */
     hci_resume_monitor_sync(hdev);
 
     /* Resume other advertisements */
     hci_resume_advertising_sync(hdev);
 
     /* Resume discovery */
     hci_resume_discovery_sync(hdev);
 
     return 0;
 }
 
 static bool conn_use_rpa(struct hci_conn *conn)
 {
     struct hci_dev *hdev = conn->hdev;
 
     return hci_dev_test_flag(hdev, HCI_PRIVACY);
 }
 
 static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
                         struct hci_conn *conn)
 {
     struct hci_cp_le_set_ext_adv_params cp;
     int err;
     bdaddr_t random_addr;
     u8 own_addr_type;
 
     err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
                          &own_addr_type);
     if (err)
         return err;
 
     /* Set require_privacy to false so that the remote device has a
      * chance of identifying us.
      */
     err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
                      &own_addr_type, &random_addr);
     if (err)
         return err;
 
     memset(&cp, 0, sizeof(cp));
 
     cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
     cp.own_addr_type = own_addr_type;
     cp.channel_map = hdev->le_adv_channel_map;
     cp.tx_power = HCI_TX_POWER_INVALID;
     cp.primary_phy = HCI_ADV_PHY_1M;
     cp.secondary_phy = HCI_ADV_PHY_1M;
     cp.handle = 0x00; /* Use instance 0 for directed adv */
     cp.own_addr_type = own_addr_type;
     cp.peer_addr_type = conn->dst_type;
     bacpy(&cp.peer_addr, &conn->dst);
 
     /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
      * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
      * does not supports advertising data when the advertising set already
      * contains some, the controller shall return erroc code 'Invalid
      * HCI Command Parameters(0x12).
      * So it is required to remove adv set for handle 0x00. since we use
      * instance 0 for directed adv.
      */
     err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
     if (err)
         return err;
 
     err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
                     sizeof(cp), &cp, HCI_CMD_TIMEOUT);
     if (err)
         return err;
 
     /* Check if random address need to be updated */
     if (own_addr_type == ADDR_LE_DEV_RANDOM &&
         bacmp(&random_addr, BDADDR_ANY) &&
         bacmp(&random_addr, &hdev->random_addr)) {
         err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
                                &random_addr);
         if (err)
             return err;
     }
 
     return hci_enable_ext_advertising_sync(hdev, 0x00);
 }
 
 static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
                         struct hci_conn *conn)
 {
     struct hci_cp_le_set_adv_param cp;
     u8 status;
     u8 own_addr_type;
     u8 enable;
 
     if (ext_adv_capable(hdev))
         return hci_le_ext_directed_advertising_sync(hdev, conn);
 
     /* Clear the HCI_LE_ADV bit temporarily so that the
      * hci_update_random_address knows that it's safe to go ahead
      * and write a new random address. The flag will be set back on
      * as soon as the SET_ADV_ENABLE HCI command completes.
      */
     hci_dev_clear_flag(hdev, HCI_LE_ADV);
 
     /* Set require_privacy to false so that the remote device has a
      * chance of identifying us.
      */
     status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
                         &own_addr_type);
     if (status)
         return status;
 
     memset(&cp, 0, sizeof(cp));
 
     /* Some controllers might reject command if intervals are not
      * within range for undirected advertising.
      * BCM20702A0 is known to be affected by this.
      */
     cp.min_interval = cpu_to_le16(0x0020);
     cp.max_interval = cpu_to_le16(0x0020);
 
     cp.type = LE_ADV_DIRECT_IND;
     cp.own_address_type = own_addr_type;
     cp.direct_addr_type = conn->dst_type;
     bacpy(&cp.direct_addr, &conn->dst);
     cp.channel_map = hdev->le_adv_channel_map;
 
     status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
                        sizeof(cp), &cp, HCI_CMD_TIMEOUT);
     if (status)
         return status;
 
     enable = 0x01;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
                      sizeof(enable), &enable, HCI_CMD_TIMEOUT);
 }
 
 static void set_ext_conn_params(struct hci_conn *conn,
                 struct hci_cp_le_ext_conn_param *p)
 {
     struct hci_dev *hdev = conn->hdev;
 
     memset(p, 0, sizeof(*p));
 
     p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
     p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
     p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
     p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
     p->conn_latency = cpu_to_le16(conn->le_conn_latency);
     p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
     p->min_ce_len = cpu_to_le16(0x0000);
     p->max_ce_len = cpu_to_le16(0x0000);
 }
 
 static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
                        struct hci_conn *conn, u8 own_addr_type)
 {
     struct hci_cp_le_ext_create_conn *cp;
     struct hci_cp_le_ext_conn_param *p;
     u8 data[sizeof(*cp) + sizeof(*p) * 3];
     u32 plen;
 
     cp = (void *)data;
     p = (void *)cp->data;
 
     memset(cp, 0, sizeof(*cp));
 
     bacpy(&cp->peer_addr, &conn->dst);
     cp->peer_addr_type = conn->dst_type;
     cp->own_addr_type = own_addr_type;
 
     plen = sizeof(*cp);
 
     if (scan_1m(hdev)) {
         cp->phys |= LE_SCAN_PHY_1M;
         set_ext_conn_params(conn, p);
 
         p++;
         plen += sizeof(*p);
     }
 
     if (scan_2m(hdev)) {
         cp->phys |= LE_SCAN_PHY_2M;
         set_ext_conn_params(conn, p);
 
         p++;
         plen += sizeof(*p);
     }
 
     if (scan_coded(hdev)) {
         cp->phys |= LE_SCAN_PHY_CODED;
         set_ext_conn_params(conn, p);
 
         plen += sizeof(*p);
     }
 
     return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
                     plen, data,
                     HCI_EV_LE_ENHANCED_CONN_COMPLETE,
                     conn->conn_timeout, NULL);
 }
 
 int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
 {
     struct hci_cp_le_create_conn cp;
     struct hci_conn_params *params;
     u8 own_addr_type;
     int err;
 
     /* If requested to connect as peripheral use directed advertising */
     if (conn->role == HCI_ROLE_SLAVE) {
         /* If we're active scanning and simultaneous roles is not
          * enabled simply reject the attempt.
          */
         if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
             hdev->le_scan_type == LE_SCAN_ACTIVE &&
             !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
             hci_conn_del(conn);
             return -EBUSY;
         }
 
         /* Pause advertising while doing directed advertising. */
         hci_pause_advertising_sync(hdev);
 
         err = hci_le_directed_advertising_sync(hdev, conn);
         goto done;
     }
 
     /* Disable advertising if simultaneous roles is not in use. */
     if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
         hci_pause_advertising_sync(hdev);
 
     params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
     if (params) {
         conn->le_conn_min_interval = params->conn_min_interval;
         conn->le_conn_max_interval = params->conn_max_interval;
         conn->le_conn_latency = params->conn_latency;
         conn->le_supv_timeout = params->supervision_timeout;
     } else {
         conn->le_conn_min_interval = hdev->le_conn_min_interval;
         conn->le_conn_max_interval = hdev->le_conn_max_interval;
         conn->le_conn_latency = hdev->le_conn_latency;
         conn->le_supv_timeout = hdev->le_supv_timeout;
     }
 
     /* If controller is scanning, we stop it since some controllers are
      * not able to scan and connect at the same time. Also set the
      * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
      * handler for scan disabling knows to set the correct discovery
      * state.
      */
     if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
         hci_scan_disable_sync(hdev);
         hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
     }
 
     /* Update random address, but set require_privacy to false so
      * that we never connect with an non-resolvable address.
      */
     err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
                          &own_addr_type);
     if (err)
         goto done;
 
     if (use_ext_conn(hdev)) {
         err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
         goto done;
     }
 
     memset(&cp, 0, sizeof(cp));
 
     cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
     cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
 
     bacpy(&cp.peer_addr, &conn->dst);
     cp.peer_addr_type = conn->dst_type;
     cp.own_address_type = own_addr_type;
     cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
     cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
     cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
     cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
     cp.min_ce_len = cpu_to_le16(0x0000);
     cp.max_ce_len = cpu_to_le16(0x0000);
 
     /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
      *
      * If this event is unmasked and the HCI_LE_Connection_Complete event
      * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
      * sent when a new connection has been created.
      */
     err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
                        sizeof(cp), &cp,
                        use_enhanced_conn_complete(hdev) ?
                        HCI_EV_LE_ENHANCED_CONN_COMPLETE :
                        HCI_EV_LE_CONN_COMPLETE,
                        conn->conn_timeout, NULL);
 
 done:
     /* Re-enable advertising after the connection attempt is finished. */
     hci_resume_advertising_sync(hdev);
     return err;
 }
 
 int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
 {
     struct hci_cp_le_remove_cig cp;
 
     memset(&cp, 0, sizeof(cp));
     cp.cig_id = handle;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
                      &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
 {
     struct hci_cp_le_big_term_sync cp;
 
     memset(&cp, 0, sizeof(cp));
     cp.handle = handle;
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }
 
 int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
 {
     struct hci_cp_le_pa_term_sync cp;
 
     memset(&cp, 0, sizeof(cp));
     cp.handle = cpu_to_le16(handle);
 
     return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
                      sizeof(cp), &cp, HCI_CMD_TIMEOUT);
 }