[media] uvcvideo: Disable the queue when failing to start

When failing to start the camera we should disable the queue again, to
rollback into the same initial state. Otherwise re-trying will always
hit -EBUSY

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/uvc/uvc_video.c

@@ -1255,8 +1255,10 @@ int uvc_video_enable(struct uvc_streaming *stream, int enable)
 
 	/* Commit the streaming parameters. */
 	ret = uvc_commit_video(stream, &stream->ctrl);
-	if (ret < 0)
+	if (ret < 0) {
+		uvc_queue_enable(&stream->queue, 0);
 		return ret;
+	}
 
 	return uvc_init_video(stream, GFP_KERNEL);
 }