linux-kernel - Re: [PATCH] gpio: gpio-altera-a10sr: remove platform_set

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Message-ID: <CAMpxmJVtOREtXwEgM4Ak40m+fFEOKU_U1hzuujtmts2c=c92AQ@mail.gmail.com>
Date:   Fri, 21 May 2021 15:37:07 +0200
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Alexandru Ardelean <aardelean@...iqon.com>
Cc:     linux-gpio <linux-gpio@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Thor Thayer <thor.thayer@...ux.intel.com>
Subject: Re: [PATCH] gpio: gpio-altera-a10sr: remove platform_set_drvdata() +
 cleanup probe

On Fri, May 14, 2021 at 11:20 AM Alexandru Ardelean
<aardelean@...iqon.com> wrote:
>
> The platform_set_drvdata() call is only useful if we need to retrieve back
> the private information.
> Since the driver doesn't do that, it's not useful to have it.
>
> If this is removed, we can also just do a direct return on
> devm_gpiochip_add_data(). We don't need to print that this call failed as
> there are other ways to log/see this during probe.
>
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
> ---
>  drivers/gpio/gpio-altera-a10sr.c | 11 +----------
>  1 file changed, 1 insertion(+), 10 deletions(-)
>
> diff --git a/drivers/gpio/gpio-altera-a10sr.c b/drivers/gpio/gpio-altera-a10sr.c
> index b5917c48e4dc..6af51feda06f 100644
> --- a/drivers/gpio/gpio-altera-a10sr.c
> +++ b/drivers/gpio/gpio-altera-a10sr.c
> @@ -78,7 +78,6 @@ static const struct gpio_chip altr_a10sr_gc = {
>  static int altr_a10sr_gpio_probe(struct platform_device *pdev)
>  {
>         struct altr_a10sr_gpio *gpio;
> -       int ret;
>         struct altr_a10sr *a10sr = dev_get_drvdata(pdev->dev.parent);
>
>         gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
> @@ -91,15 +90,7 @@ static int altr_a10sr_gpio_probe(struct platform_device *pdev)
>         gpio->gp.parent = pdev->dev.parent;
>         gpio->gp.of_node = pdev->dev.of_node;
>
> -       ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
> -       if (ret < 0) {
> -               dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
> -               return ret;
> -       }
> -
> -       platform_set_drvdata(pdev, gpio);
> -
> -       return 0;
> +       return devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
>  }
>
>  static const struct of_device_id altr_a10sr_gpio_of_match[] = {
> --
> 2.31.1
>

Applied, thanks!
Bartosz