linux-kernel - Re: [PATCH] media: imx-pxp: fix ERR_PTR dereference in pxp

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Message-ID: <f07e6b92-e133-4515-bfc9-24b24ad178d1@oracle.com>
Date: Tue, 14 May 2024 15:16:39 +0530
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Michael Tretter <m.tretter@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        linux-media@...r.kernel.org, imx@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org,
        error27@...il.com
Subject: Re: [PATCH] media: imx-pxp: fix ERR_PTR dereference in pxp_probe()

Hi,
On 14/05/24 15:14, Harshit Mogalapalli wrote:
> devm_regmap_init_mmio() can fail, add a check and bail out in case of
> error.
> 

Please ignore this patch, I will send a V2.(v1->v2, I have to remove %d 
in error message)

Thanks,
Harshit
> Fixes: 4e5bd3fdbeb3 ("media: imx-pxp: convert to regmap")
> Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
> ---
>   drivers/media/platform/nxp/imx-pxp.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/media/platform/nxp/imx-pxp.c b/drivers/media/platform/nxp/imx-pxp.c
> index e62dc5c1a4ae..58c10156c7a4 100644
> --- a/drivers/media/platform/nxp/imx-pxp.c
> +++ b/drivers/media/platform/nxp/imx-pxp.c
> @@ -1805,6 +1805,9 @@ static int pxp_probe(struct platform_device *pdev)
>   		return PTR_ERR(mmio);
>   	dev->regmap = devm_regmap_init_mmio(&pdev->dev, mmio,
>   					    &pxp_regmap_config);
> +	if (IS_ERR(dev->regmap))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(dev->regmap),
> +				     "Failed to init regmap: %d\n");
>   
>   	irq = platform_get_irq(pdev, 0);
>   	if (irq < 0)