diff --git a/drivers/usb/gadget/uvc_queue.c b/drivers/usb/gadget/uvc_queue.c
index 7ce27e3..e617047 100644
--- a/drivers/usb/gadget/uvc_queue.c
+++ b/drivers/usb/gadget/uvc_queue.c
@@ -103,10 +103,26 @@
 	spin_unlock_irqrestore(&queue->irqlock, flags);
 }
 
+static void uvc_wait_prepare(struct vb2_queue *vq)
+{
+	struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
+
+	mutex_unlock(&queue->mutex);
+}
+
+static void uvc_wait_finish(struct vb2_queue *vq)
+{
+	struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
+
+	mutex_lock(&queue->mutex);
+}
+
 static struct vb2_ops uvc_queue_qops = {
 	.queue_setup = uvc_queue_setup,
 	.buf_prepare = uvc_buffer_prepare,
 	.buf_queue = uvc_buffer_queue,
+	.wait_prepare = uvc_wait_prepare,
+	.wait_finish = uvc_wait_finish,
 };
 
 static int uvc_queue_init(struct uvc_video_queue *queue,