Bluetooth: bpa10x: change return value

When returning from bpa10x_send_frame, it is necessary to propagate any
potential errno returned from usb_submit_urb.
Signed-off-by: NNavid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/bpa10x.c

@@ -337,7 +337,7 @@ static int bpa10x_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 
 	usb_free_urb(urb);
 
-	return 0;
+	return err;
 }
 
 static int bpa10x_set_diag(struct hci_dev *hdev, bool enable)