Bluetooth: btusb: add shutdown function for wcn6855

we should send hci reset command before bt turn off, which can reset bt
firmware status.

Signed-off-by: Tim Jiang <tjiang@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 1b69016..4670a37 100644 (file)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4260,6 +4260,20 @@ static bool btusb_prevent_wake(struct hci_dev *hdev)
        return !device_may_wakeup(&data->udev->dev);
 }
 
+static int btusb_shutdown_qca(struct hci_dev *hdev)
+{
+       struct sk_buff *skb;
+
+       skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
+       if (IS_ERR(skb)) {
+               bt_dev_err(hdev, "HCI reset during shutdown failed");
+               return PTR_ERR(skb);
+       }
+       kfree_skb(skb);
+
+       return 0;
+}
+
 static int btusb_probe(struct usb_interface *intf,
                       const struct usb_device_id *id)
 {
@@ -4519,6 +4533,7 @@ static int btusb_probe(struct usb_interface *intf,
 
        if (id->driver_info & BTUSB_QCA_WCN6855) {
                data->setup_on_usb = btusb_setup_qca;
+               hdev->shutdown = btusb_shutdown_qca;
                hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
                hdev->cmd_timeout = btusb_qca_cmd_timeout;
                set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);