linux-kernel - Re: [PATCH v1 2/5] [media] mtk-mdp: handle vb2_dma_contig_set_max_seg_size errors during probe

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Date:   Tue, 5 May 2020 23:45:45 +0200
From:   Enric Balletbo Serra <eballetbo@...il.com>
To:     Eizan Miyamoto <eizan@...omium.org>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        Eizan Miyamoto <eizan@...gle.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-media@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 2/5] [media] mtk-mdp: handle vb2_dma_contig_set_max_seg_size
 errors during probe

Hi Eizan,

Thank you for your patch.

Missatge de Eizan Miyamoto <eizan@...omium.org> del dia dt., 5 de maig
2020 a les 6:01:
>
> This is a cleanup to better handle errors during MDP probe.
>
> Signed-off-by: eizan@...omium.org
> Signed-off-by: Eizan Miyamoto <eizan@...gle.com>

Same comment as the first patch. You should probably fix your configuration.

> ---
>
>  drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> index aeaed2cf4458..c20ac7681c6f 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> @@ -193,13 +193,19 @@ static int mtk_mdp_probe(struct platform_device *pdev)
>
>         platform_set_drvdata(pdev, mdp);
>
> -       vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
> +       ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
> +       if (ret) {
> +               dev_err(&pdev->dev, "Failed to set vb2 dma mag seg size\n");
> +               goto err_set_max_seg_size;

You don't need to introduce a new label, just goto err_m2m_register

> +       }
>
>         pm_runtime_enable(dev);
>         dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);
>
>         return 0;
>
> +err_set_max_seg_size:
> +
>  err_m2m_register:
>         v4l2_device_unregister(&mdp->v4l2_dev);
>
> --
> 2.26.2.526.g744177e7f7-goog
>
>
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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