linux-kernel - Re: [PATCH] media: i2c: imx219: Check return value of devm_gpiod_get_optional() in imx219

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Message-ID: <177016661698.9154.10184896089971298930@freya>
Date: Wed, 04 Feb 2026 06:26:56 +0530
From: Jai Luthra <jai.luthra@...asonboard.com>
To: Chen Ni <nichen@...as.ac.cn>, dave.stevenson@...pberrypi.com, mchehab@...nel.org, sakari.ailus@...ux.intel.com
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, Chen Ni <nichen@...as.ac.cn>, stable@...nel.org
Subject: Re: [PATCH] media: i2c: imx219: Check return value of devm_gpiod_get_optional() in imx219_probe()

Quoting Chen Ni (2026-02-02 08:10:24)
> The devm_gpiod_get_optional() function may return an error pointer
> (ERR_PTR) in case of a genuine failure during GPIO acquisition,
> not just NULL which indicates the legitimate absence of an optional
> GPIO.
> 
> Add an IS_ERR() check after the function call to catch such errors and
> propagate them to the probe function, ensuring the driver fails to load
> safely rather than proceeding with an invalid pointer.

Good catch, maybe a fixes tag is appropriate so this gets backported to
stable kernels.

Fixes: 1283b3b8f82b ("media: i2c: Add driver for Sony IMX219 sensor")

with that,

Reviewed-by: Jai Luthra <jai.luthra@...asonboard.com>

> 
> Signed-off-by: Chen Ni <nichen@...as.ac.cn>
> ---
>  drivers/media/i2c/imx219.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
> index fee63bc106d9..7da02ce5da15 100644
> --- a/drivers/media/i2c/imx219.c
> +++ b/drivers/media/i2c/imx219.c
> @@ -1218,6 +1218,9 @@ static int imx219_probe(struct i2c_client *client)
>         /* Request optional enable pin */
>         imx219->reset_gpio = devm_gpiod_get_optional(dev, "reset",
>                                                      GPIOD_OUT_HIGH);
> +       if (IS_ERR(imx219->reset_gpio))
> +               return dev_err_probe(dev, PTR_ERR(imx219->reset_gpio),
> +                                    "failed to get reset gpio\n");
>  
>         /*
>          * The sensor must be powered for imx219_identify_module()
> -- 
> 2.25.1
> 
>