linux-kernel - Re: [PATCH] gpio: viperboard: remove platform_set

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Message-ID: <CAMpxmJVBTqX_e6a7PjdNmwYN-SCgqXQ1WbfzZbRLBGvPSVHTFQ@mail.gmail.com>
Date:   Wed, 21 Jul 2021 15:16:23 +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>
Subject: Re: [PATCH] gpio: viperboard: remove platform_set_drvdata() call in probe

On Wed, Jul 7, 2021 at 3:51 PM 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 change removes it.
>
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
> ---
>  drivers/gpio/gpio-viperboard.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
> index c301c1d56dd2..98ddd6590362 100644
> --- a/drivers/gpio/gpio-viperboard.c
> +++ b/drivers/gpio/gpio-viperboard.c
> @@ -422,12 +422,8 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
>         vb_gpio->gpiob.direction_input = vprbrd_gpiob_direction_input;
>         vb_gpio->gpiob.direction_output = vprbrd_gpiob_direction_output;
>         ret = devm_gpiochip_add_data(&pdev->dev, &vb_gpio->gpiob, vb_gpio);
> -       if (ret < 0) {
> +       if (ret < 0)
>                 dev_err(vb_gpio->gpiob.parent, "could not add gpio b");
> -               return ret;
> -       }
> -
> -       platform_set_drvdata(pdev, vb_gpio);
>
>         return ret;
>  }
> --
> 2.31.1
>

The log is not really needed, we'll get an error message from gpiolib
core. Can you remove it while you're at it and just return the result
of devm_gpiochip_add_data()?

Bart