[media] vivi: correctly cleanup after a start_streaming failure

If start_streaming fails then any queued buffers must be given back
to the vb2 core.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/vivi.c

@@ -889,10 +889,20 @@ static void buffer_queue(struct vb2_buffer *vb)
 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 {
 	struct vivi_dev *dev = vb2_get_drv_priv(vq);
+	int err;
 
 	dprintk(dev, 1, "%s\n", __func__);
 	dev->seq_count = 0;
-	return vivi_start_generating(dev);
+	err = vivi_start_generating(dev);
+	if (err) {
+		struct vivi_buffer *buf, *tmp;
+
+		list_for_each_entry_safe(buf, tmp, &dev->vidq.active, list) {
+			list_del(&buf->list);
+			vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
+		}
+	}
+	return err;
 }
 
 /* abort streaming and wait for last buffer */