On Monday, April 04, 2011 01:38:57 Pawel Osciak wrote:
> Add a sanity check to make sure drivers do not adjust the number of buffers
> or planes above the supported limit on reqbufs.
>
> Signed-off-by: Pawel Osciak
> ---
> drivers/media/video/videobuf2-core.c |5 +
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/media/video/videobuf2-core.c
> b/drivers/media/video/videobuf2-core.c
> index 6698c77..6e69584 100644
> --- a/drivers/media/video/videobuf2-core.c
> +++ b/drivers/media/video/videobuf2-core.c
> @@ -529,6 +529,11 @@ int vb2_reqbufs(struct vb2_queue *q, struct
> v4l2_requestbuffers *req)
> if (ret)
> return ret;
>
> + /*
> + * Make sure driver did not request more buffers/planes than we can
> handle.
> + */
> + BUG_ON (num_buffers > VIDEO_MAX_FRAME || num_planes > VIDEO_MAX_PLANES);
> +
I would make this a 'if' with a WARN_ON and error return. More debug-friendly.
Regards,
Hans
> /* Finally, allocate buffers and video memory */
> ret = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes,
> plane_sizes);
>
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