Bluetooth: Prevent ill-timed autosuspend in USB driver

The device must be marked busy as it receives data.
Signed-off-by: NOliver Neukum <oliver@neukum.org>
Tested-by: NMatthew Garrett <mjg@redhat.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btusb.c

@@ -307,6 +307,7 @@ static void btusb_bulk_complete(struct urb *urb)
 		return;
 
 	usb_anchor_urb(urb, &data->bulk_anchor);
+	usb_mark_last_busy(data->udev);
 
 	err = usb_submit_urb(urb, GFP_ATOMIC);
 	if (err < 0) {