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authorHans Verkuil <hverkuil-cisco@xs4all.nl>2019-01-16 10:01:17 -0200
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-01-31 09:31:34 -0200
commit1284ed59a147c27cb882e49213571f7d52976eb5 (patch)
tree6fca1ee44674f77e5d207c64f89a0a18136befe0 /drivers/media/common
parent6b3e4c4cc162390b833e57de656644786ca88919 (diff)
media: vb2: check that buf_out_validate is present
The buf_out_validate is required for output queues in combination with requests. Check this. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/common')
-rw-r--r--drivers/media/common/videobuf2/videobuf2-v4l2.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index 2f3b3ca5bde6..3aeaea3af42a 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -409,6 +409,15 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md
*/
if (WARN_ON(!q->ops->buf_request_complete))
return -EINVAL;
+ /*
+ * Make sure this op is implemented by the driver for the output queue.
+ * It's easy to forget this callback, but is it important to correctly
+ * validate the 'field' value at QBUF time.
+ */
+ if (WARN_ON((q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
+ q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) &&
+ !q->ops->buf_out_validate))
+ return -EINVAL;
if (vb->state != VB2_BUF_STATE_DEQUEUED) {
dprintk(1, "%s: buffer is not in dequeued state\n", opname);