linux-kernel - Re: [PATCH] drm: msm: fix error check return value of irq_of_parse_and

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Message-ID: <CAA8EJpoAeCp-=k2o+C4E4jHBAv7f3eKrV5FZiYjVZ8hcRGYLVA@mail.gmail.com>
Date:   Fri, 22 Apr 2022 13:42:12 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     cgel.zte@...il.com
Cc:     robdclark@...il.com, sean@...rly.run, quic_abhinavk@...cinc.com,
        airlied@...ux.ie, daniel@...ll.ch, swboyd@...omium.org,
        quic_mkrishn@...cinc.com, angelogioacchino.delregno@...labora.com,
        vulab@...as.ac.cn, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Lv Ruyi <lv.ruyi@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] drm: msm: fix error check return value of irq_of_parse_and_map()

On Fri, 22 Apr 2022 at 11:52, <cgel.zte@...il.com> wrote:
>
> From: Lv Ruyi <lv.ruyi@....com.cn>
>
> The irq_of_parse_and_map() function returns 0 on failure, and does not
> return an negative value.
>
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>  drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> index 3b92372e7bdf..1fb1ed9e95d9 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> @@ -570,7 +570,7 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
>         }
>
>         irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
> -       if (irq < 0) {
> +       if (!irq) {
>                 ret = irq;
>                 DRM_DEV_ERROR(&pdev->dev, "failed to get irq: %d\n", ret);
>                 goto fail;
> --
> 2.25.1
>


-- 
With best wishes
Dmitry