[media] vb2: call buf_finish after the state check

Don't call buf_finish unless we know that the buffer is in a valid state.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/v4l2-core/videobuf2-core.c

@@ -1929,8 +1929,6 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
 	if (ret < 0)
 		return ret;
 
-	call_vb_qop(vb, buf_finish, vb);
-
 	switch (vb->state) {
 	case VB2_BUF_STATE_DONE:
 		dprintk(3, "dqbuf: Returning done buffer\n");
@@ -1943,6 +1941,8 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
 		return -EINVAL;
 	}
 
+	call_vb_qop(vb, buf_finish, vb);
+
 	/* Fill buffer information for the userspace */
 	__fill_v4l2_buffer(vb, b);
 	/* Remove from videobuf queue */