linux-kernel - Re: [PATCH] gpio: gpio-adp5520: cleanup probe error path + remove platform_set

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Message-ID: <CAMpxmJVL4Bxhj3mqaTDofVhd1mAt=wUwu51McOK=WMUSvH7gLg@mail.gmail.com>
Date:   Fri, 21 May 2021 15:31:02 +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>,
        Michael Hennerich <michael.hennerich@...log.com>
Subject: Re: [PATCH] gpio: gpio-adp5520: cleanup probe error path + remove platform_set_drvdata()

On Fri, May 14, 2021 at 10:56 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.
>
> This also means that the 'err' label can be removed and all goto statements
> replaced with direct returns (with error codes).
>
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
> ---
>  drivers/gpio/gpio-adp5520.c | 18 ++++--------------
>  1 file changed, 4 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpio/gpio-adp5520.c b/drivers/gpio/gpio-adp5520.c
> index 0386ede53f3a..c55e821c63b6 100644
> --- a/drivers/gpio/gpio-adp5520.c
> +++ b/drivers/gpio/gpio-adp5520.c
> @@ -113,10 +113,8 @@ static int adp5520_gpio_probe(struct platform_device *pdev)
>                 if (pdata->gpio_en_mask & (1 << i))
>                         dev->lut[gpios++] = 1 << i;
>
> -       if (gpios < 1) {
> -               ret = -EINVAL;
> -               goto err;
> -       }
> +       if (gpios < 1)
> +               return -EINVAL;
>
>         gc = &dev->gpio_chip;
>         gc->direction_input  = adp5520_gpio_direction_input;
> @@ -148,18 +146,10 @@ static int adp5520_gpio_probe(struct platform_device *pdev)
>
>         if (ret) {
>                 dev_err(&pdev->dev, "failed to write\n");
> -               goto err;
> +               return ret;
>         }
>
> -       ret = devm_gpiochip_add_data(&pdev->dev, &dev->gpio_chip, dev);
> -       if (ret)
> -               goto err;
> -
> -       platform_set_drvdata(pdev, dev);
> -       return 0;
> -
> -err:
> -       return ret;
> +       return devm_gpiochip_add_data(&pdev->dev, &dev->gpio_chip, dev);
>  }
>
>  static struct platform_driver adp5520_gpio_driver = {
> --
> 2.31.1
>

Applied, thanks!
Bartosz