Re: [PATCH v14 15/56] media: visl: Use vb2_get_buffer() instead of directly access to buffers array

Andrzej Pietrasiewicz
2023-11-09T09:38:34Z

W dniu 31.10.2023 o 17:30, Benjamin Gaignard pisze:
> Use vb2_get_buffer() instead of direct access to the vb2_queue bufs array.
> This allows us to change the type of the bufs in the future.
> After each call to vb2_get_buffer() we need to be sure that we get
> a valid pointer so check the return value of all of them.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>

Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>

> CC: Daniel Almeida <daniel.almeida@collabora.com>
> CC: Mauro Carvalho Chehab <mchehab@kernel.org>
> ---
> drivers/media/test-drivers/visl/visl-dec.c | 28 ++++++++++++++++------
> 1 file changed, 21 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c
> index 318d675e5668..ba20ea998d19 100644
> --- a/drivers/media/test-drivers/visl/visl-dec.c
> +++ b/drivers/media/test-drivers/visl/visl-dec.c
> @@ -290,13 +290,20 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
> for (i = 0; i < out_q->num_buffers; i++) {
> char entry[] = "index: %u, state: %s, request_fd: %d, ";
> u32 old_len = len;
> - char *q_status = visl_get_vb2_state(out_q->bufs[i]->state);
> + struct vb2_buffer *vb2;
> + char *q_status;
> +
> + vb2 = vb2_get_buffer(out_q, i);
> + if (!vb2)
> + continue;
> +
> + q_status = visl_get_vb2_state(vb2->state);
>
> len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len,
> entry, i, q_status,
> - to_vb2_v4l2_buffer(out_q->bufs[i])->request_fd);
> + to_vb2_v4l2_buffer(vb2)->request_fd);
>
> - len += visl_fill_bytesused(to_vb2_v4l2_buffer(out_q->bufs[i]),
> + len += visl_fill_bytesused(to_vb2_v4l2_buffer(vb2),
> &buf[len],
> TPG_STR_BUF_SZ - len);
>
> @@ -342,13 +349,20 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run)
> len = 0;
> for (i = 0; i < cap_q->num_buffers; i++) {
> u32 old_len = len;
> - char *q_status = visl_get_vb2_state(cap_q->bufs[i]->state);
> + struct vb2_buffer *vb2;
> + char *q_status;
> +
> + vb2 = vb2_get_buffer(cap_q, i);
> + if (!vb2)
> + continue;
> +
> + q_status = visl_get_vb2_state(vb2->state);
>
> len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len,
> "index: %u, status: %s, timestamp: %llu, is_held: %d",
> - cap_q->bufs[i]->index, q_status,
> - cap_q->bufs[i]->timestamp,
> - to_vb2_v4l2_buffer(cap_q->bufs[i])->is_held);
> + vb2->index, q_status,
> + vb2->timestamp,
> + to_vb2_v4l2_buffer(vb2)->is_held);
>
> tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]);
> frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]);