linux-kernel - Re: [PATCH] drm/imx: dw_hdmi-imx: Fix bailout in error cases of probe

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Message-ID: <933830e163f5f514a24e8b6137c0ff2e4c89e7e5.camel@pengutronix.de>
Date:   Tue, 29 Mar 2022 18:41:33 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Liu Ying <victor.liu@....com>, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Subject: Re: [PATCH] drm/imx: dw_hdmi-imx: Fix bailout in error cases of
 probe

On Fr, 2022-01-28 at 17:19 +0800, Liu Ying wrote:
> In dw_hdmi_imx_probe(), if error happens after dw_hdmi_probe()
> returns
> successfully, dw_hdmi_remove() should be called where necessary as
> bailout.
> 
> Fixes: c805ec7eb210 ("drm/imx: dw_hdmi-imx: move initialization into
> probe")
> Cc: Philipp Zabel <p.zabel@...gutronix.de>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: Sascha Hauer <s.hauer@...gutronix.de>
> Cc: Pengutronix Kernel Team <kernel@...gutronix.de>
> Cc: Fabio Estevam <festevam@...il.com>
> Cc: NXP Linux Team <linux-imx@....com>
> Signed-off-by: Liu Ying <victor.liu@....com>
> ---
>  drivers/gpu/drm/imx/dw_hdmi-imx.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> index 87428fb23d9f..a2277a0d6d06 100644
> --- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> +++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> @@ -222,6 +222,7 @@ static int dw_hdmi_imx_probe(struct
> platform_device *pdev)
>         struct device_node *np = pdev->dev.of_node;
>         const struct of_device_id *match =
> of_match_node(dw_hdmi_imx_dt_ids, np);
>         struct imx_hdmi *hdmi;
> +       int ret;
>  
>         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
>         if (!hdmi)
> @@ -243,10 +244,15 @@ static int dw_hdmi_imx_probe(struct
> platform_device *pdev)
>         hdmi->bridge = of_drm_find_bridge(np);
>         if (!hdmi->bridge) {
>                 dev_err(hdmi->dev, "Unable to find bridge\n");
> +               dw_hdmi_remove(hdmi->hdmi);
>                 return -ENODEV;
>         }
>  
> -       return component_add(&pdev->dev, &dw_hdmi_imx_ops);
> +       ret = component_add(&pdev->dev, &dw_hdmi_imx_ops);
> +       if (ret)
> +               dw_hdmi_remove(hdmi->hdmi);
> +
> +       return ret;
>  }
>  
>  static int dw_hdmi_imx_remove(struct platform_device *pdev)

Thank you, applied to imx-drm/fixes.

regards
Philipp