Hi Naush,

Thank you for the patch.

(CC'ing John Cox as the author of the commit being reverted, and Hans Verkuil as he has merged it)

On Wed, Jan 06, 2021 at 03:16:57PM +0000, Naushir Patuck wrote:

The updated length check for dmabuf types broke existing usage in v4l2 userland clients.

Fixes: 961d3b27 ("media: videobuf2: Fix length check for single plane dmabuf queueing") Cc: stable@vger.kernel.org Signed-off-by: Naushir Patuck naush@raspberrypi.com Tested-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Reviewed-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com

Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com

---

drivers/media/common/videobuf2/videobuf2-v4l2.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 96d3b2b2aa31..3f61f5863bf7 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -118,8 +118,7 @@ static int __verify_length(struct vb2_buffer *vb, const struct v4l2_buffer *b) return -EINVAL; } } else {

• length = (b->memory == VB2_MEMORY_USERPTR ||
  

• 	  b->memory == VB2_MEMORY_DMABUF)
  

• length = (b->memory == VB2_MEMORY_USERPTR)
  ? b->length : vb->planes[0].length;
  

if (b->bytesused > length)