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Subject: media: Revert "media: videobuf2: Fix length check for single plane dmabuf queueing" Author: Naushir Patuck naush@raspberrypi.com Date: Wed Jan 6 16:16:57 2021 +0100

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 Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org

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)