On 09/10/17 14:24, Stanimir Varbanov wrote:
> This fixes wrongly filled bytesused field of v4l2_plane structure
> by include data_offset in the plane, Also fill data_offset and
> bytesused for capture type of buffers only.
>
> Signed-off-by: Stanimir Varbanov <stanimir.varba...@linaro.org>
> ---
> drivers/media/platform/qcom/venus/venc.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/platform/qcom/venus/venc.c
> b/drivers/media/platform/qcom/venus/venc.c
> index 6f123a387cf9..9445ad492966 100644
> --- a/drivers/media/platform/qcom/venus/venc.c
> +++ b/drivers/media/platform/qcom/venus/venc.c
> @@ -963,15 +963,16 @@ static void venc_buf_done(struct venus_inst *inst,
> unsigned int buf_type,
> if (!vbuf)
> return;
>
> - vb = &vbuf->vb2_buf;
> - vb->planes[0].bytesused = bytesused;
> - vb->planes[0].data_offset = data_offset;
> -
> vbuf->flags = flags;
>
> if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
> + vb = &vbuf->vb2_buf;
> + vb2_set_plane_payload(vb, 0, bytesused + data_offset);
> + vb->planes[0].data_offset = data_offset;
> vb->timestamp = timestamp_us * NSEC_PER_USEC;
> vbuf->sequence = inst->sequence_cap++;
> +
> + WARN_ON(vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0));
It's good to have this, but this really should never happen. Because if it is,
then you'll have a memory overwrite. I hope the DMA engine will prevent this?
Just wondering how this works.
The patch looks good otherwise, but that WARN_ON is a bit scary.
Regards,
Hans
> } else {
> vbuf->sequence = inst->sequence_out++;
> }
>
