Re: [PATCH v4 1/3] iio: pressure: bmp280: Use IS_ERR() in bmp280_common_probe()

[Jonathan Cameron]

On Mon, 18 Aug 2025 10:27:30 +0100
Salah Triki <salah.triki@xxxxxxxxx> wrote:

> `devm_gpiod_get_optional()` may return non-NULL error pointer on failure.
> Check its return value using `IS_ERR()` and propagate the error if
> necessary.
> 
> Fixes: df6e71256c84 ("iio: pressure: bmp280: Explicitly mark GPIO optional")
> Cc: David Lechner <dlechner@xxxxxxxxxxxx>
> Cc: Jonathan Cameron <jic23@xxxxxxxxxx>
> Cc: Andy Shevchenko <andy@xxxxxxxxxx>
> Cc: Nuno Sá <nuno.sa@xxxxxxxxxx>
> Cc: Markus Elfring <Markus.Elfring@xxxxxx>
> Signed-off-by: Salah Triki <salah.triki@xxxxxxxxx>
> Reviewed-by: David Lechner <dlechner@xxxxxxxxxxxx>

Applied to the fixes-togreg branch of iio.git and marked for stable.

The rest of the series will have to wait for that to work it's way back
via upstream. 

Thanks

Jonathan

> ---
>  drivers/iio/pressure/bmp280-core.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
> index 74505c9ec1a0..6cdc8ed53520 100644
> --- a/drivers/iio/pressure/bmp280-core.c
> +++ b/drivers/iio/pressure/bmp280-core.c
> @@ -3213,11 +3213,12 @@ int bmp280_common_probe(struct device *dev,
>  
>  	/* Bring chip out of reset if there is an assigned GPIO line */
>  	gpiod = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
> +	if (IS_ERR(gpiod))
> +		return dev_err_probe(dev, PTR_ERR(gpiod), "failed to get reset GPIO\n");
> +
>  	/* Deassert the signal */
> -	if (gpiod) {
> -		dev_info(dev, "release reset\n");
> -		gpiod_set_value(gpiod, 0);
> -	}
> +	dev_info(dev, "release reset\n");
> +	gpiod_set_value(gpiod, 0);
>  
>  	data->regmap = regmap;
>