[PATCH] Bluetooth: Add hci_dev_lock to get/set device flags

[Abhishek Pandit-Subedi]

Adding hci_dev_lock since hci_conn_params_(lookup|add) require this
lock.

Suggested-by: Miao-chen Chou <mcc...@chromium.org>
Signed-off-by: Abhishek Pandit-Subedi <abhishekpan...@chromium.org>
---

 net/bluetooth/mgmt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 2a732cab1dc99d..5e9b9728eeac03 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3895,6 +3895,8 @@ static int get_device_flags(struct sock *sk, struct 
hci_dev *hdev, void *data,
        bt_dev_dbg(hdev, "Get device flags %pMR (type 0x%x)\n",
                   &cp->addr.bdaddr, cp->addr.type);
 
+       hci_dev_lock(hdev);
+
        if (cp->addr.type == BDADDR_BREDR) {
                br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
                                                              &cp->addr.bdaddr,
@@ -3921,6 +3923,8 @@ static int get_device_flags(struct sock *sk, struct 
hci_dev *hdev, void *data,
        status = MGMT_STATUS_SUCCESS;
 
 done:
+       hci_dev_unlock(hdev);
+
        return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_DEVICE_FLAGS, status,
                                &rp, sizeof(rp));
 }
@@ -3959,6 +3963,8 @@ static int set_device_flags(struct sock *sk, struct 
hci_dev *hdev, void *data,
                goto done;
        }
 
+       hci_dev_lock(hdev);
+
        if (cp->addr.type == BDADDR_BREDR) {
                br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
                                                              &cp->addr.bdaddr,
@@ -3985,6 +3991,8 @@ static int set_device_flags(struct sock *sk, struct 
hci_dev *hdev, void *data,
        }
 
 done:
+       hci_dev_unlock(hdev);
+
        if (status == MGMT_STATUS_SUCCESS)
                device_flags_changed(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
                                     supported_flags, current_flags);
-- 
2.27.0.111.gc72c7da667-goog