Re: [PATCH v11 41/56] media: cedrus: Stop direct calls to queue num_buffers field

Paul Kocialkowski
2023-10-17T08:55:08Z

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Hi Benjamin,

On Thu 12 Oct 23, 13:46, Benjamin Gaignard wrote:
> Use vb2_get_num_buffers() and queue max_num_buffers field
> to avoid using queue num_buffer field directly.

Thanks for the patch, this is indeed a nice cleanup and safer usage.
Maybe the commit message needs to reflect why this change is welcome,
not just what is being changed.

> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> CC: Maxime Ripard <mripard@kernel.org>
> CC: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> ---
> drivers/staging/media/sunxi/cedrus/cedrus_h264.c | 8 ++++++--
> drivers/staging/media/sunxi/cedrus/cedrus_h265.c | 9 +++++++--
> 2 files changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
> index dfb401df138a..95e490532a87 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
> @@ -653,8 +653,12 @@ static void cedrus_h264_stop(struct cedrus_ctx *ctx)
>
> vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
>
> - for (i = 0; i < vq->num_buffers; i++) {
> - buf = vb2_to_cedrus_buffer(vb2_get_buffer(vq, i));
> + for (i = 0; i < vb2_get_num_buffers(vq); i++) {
> + struct vb2_buffer *vb = vb2_get_buffer(vq, i);
> +
> + if (!vb)
> + continue;

Please add a newline here to be consistent with the other block being changed.

With this change and the commit log reworked, you can consider this:
Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Thanks!

Paul

> + buf = vb2_to_cedrus_buffer(vb);
>
> if (buf->codec.h264.mv_col_buf_size > 0) {
> dma_free_attrs(dev->dev,
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> index fc9297232456..52e94c8f2f01 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> @@ -869,8 +869,13 @@ static void cedrus_h265_stop(struct cedrus_ctx *ctx)
>
> vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
>
> - for (i = 0; i < vq->num_buffers; i++) {
> - buf = vb2_to_cedrus_buffer(vb2_get_buffer(vq, i));
> + for (i = 0; i < vb2_get_num_buffers(vq); i++) {
> + struct vb2_buffer *vb = vb2_get_buffer(vq, i);
> +
> + if (!vb)
> + continue;
> +
> + buf = vb2_to_cedrus_buffer(vb);
>
> if (buf->codec.h265.mv_col_buf_size > 0) {
> dma_free_attrs(dev->dev,
> --
> 2.39.2
>

--
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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