linux-kernel - Re: [PATCH v1 06/18] media: hantro: Make sure that ctx->codex

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Message-ID: <361ec02b1af1093684dfd33806025f3d044fc6e2.camel@collabora.com>
Date:   Wed, 17 Feb 2021 17:11:28 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        p.zabel@...gutronix.de, mchehab@...nel.org, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, gregkh@...uxfoundation.org,
        mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
        jernej.skrabec@...l.net, krzk@...nel.org, shengjiu.wang@....com,
        adrian.ratiu@...labora.com, aisheng.dong@....com, peng.fan@....com,
        Anson.Huang@....com, hverkuil-cisco@...all.nl
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        kernel@...labora.com
Subject: Re: [PATCH v1 06/18] media: hantro: Make sure that ctx->codex_ops
 is set

On Wed, 2021-02-17 at 09:02 +0100, Benjamin Gaignard wrote:
> Do not try to call ctx->codec_ops->done if ctx->codec_ops is not set.
> 

If codec_ops is not set for a codec variant,
things will go south really fast. See hantro_start_streaming
for instance.

I think you can just drop this patch.

Thanks,
Ezequiel

> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@...labora.com>
> ---
>  drivers/staging/media/hantro/hantro_drv.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
> index 0d58209fc55c..0570047c7fa0 100644
> --- a/drivers/staging/media/hantro/hantro_drv.c
> +++ b/drivers/staging/media/hantro/hantro_drv.c
> @@ -93,7 +93,8 @@ void hantro_irq_done(struct hantro_dev *vpu,
>          * and will take care of finishing the job.
>          */
>         if (cancel_delayed_work(&vpu->watchdog_work)) {
> -               if (result == VB2_BUF_STATE_DONE && ctx->codec_ops->done)
> +               if (result == VB2_BUF_STATE_DONE &&
> +                   ctx->codec_ops && ctx->codec_ops->done)
>                         ctx->codec_ops->done(ctx);
>                 hantro_job_finish(vpu, ctx, result);
>         }