diff options
Diffstat (limited to 'drivers/bluetooth/btusb.c')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 572fd75fbcf6..f99fc6bfd1da 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2369,6 +2369,22 @@ static int btusb_shutdown_intel(struct hci_dev *hdev) struct sk_buff *skb; long ret; + /* In the shutdown sequence where Bluetooth is turned off followed + * by WiFi being turned off, turning WiFi back on causes issue with + * the RF calibration. + * + * To ensure that any RF activity has been stopped, issue HCI Reset + * command to clear all ongoing activity including advertising, + * scanning etc. + */ + skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + ret = PTR_ERR(skb); + bt_dev_err(hdev, "HCI reset during shutdown failed"); + return ret; + } + kfree_skb(skb); + /* Some platforms have an issue with BT LED when the interface is * down or BT radio is turned off, which takes 5 seconds to BT LED * goes off. This command turns off the BT LED immediately. |