diff options
| -rw-r--r-- | drivers/bluetooth/btusb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 9aa018d4f6f5..145b3fbfff55 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2639,8 +2639,15 @@ static void btusb_mtk_claim_iso_intf(struct btusb_data *data) struct btmtk_data *btmtk_data = hci_get_priv(data->hdev); int err; + /* + * The function usb_driver_claim_interface() is documented to need + * locks held if it's not called from a probe routine. The code here + * is called from the hci_power_on workqueue, so grab the lock. + */ + device_lock(&btmtk_data->isopkt_intf->dev); err = usb_driver_claim_interface(&btusb_driver, btmtk_data->isopkt_intf, data); + device_unlock(&btmtk_data->isopkt_intf->dev); if (err < 0) { btmtk_data->isopkt_intf = NULL; bt_dev_err(data->hdev, "Failed to claim iso interface"); |