linux-kernel - Re: [RESEND PATCH v3 1/4] leds: class: simplify the implementation of devm_of_led

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Date:   Sat, 17 Sep 2022 11:23:29 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Cc:     pavel@....cz, robh+dt@...nel.org,
        sven.schwermer@...ruptive-technologies.com,
        krzysztof.kozlowski+dt@...aro.org, johan+linaro@...nel.org,
        marijn.suijten@...ainline.org, bjorn.andersson@...aro.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, sha@...gutronix.de
Subject: Re: [RESEND PATCH v3 1/4] leds: class: simplify the implementation of devm_of_led_get()

On Sat, Sep 17, 2022 at 11:14 AM Jean-Jacques Hiblot
<jjhiblot@...phandler.com> wrote:
>
> Use the devm_add_action_or_reset() helper.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
> ---
>  drivers/leds/led-class.c | 20 ++++++--------------
>  1 file changed, 6 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
> index 6a8ea94834fa..2c0d979d0c8a 100644
> --- a/drivers/leds/led-class.c
> +++ b/drivers/leds/led-class.c
> @@ -258,11 +258,9 @@ void led_put(struct led_classdev *led_cdev)
>  }
>  EXPORT_SYMBOL_GPL(led_put);
>
> -static void devm_led_release(struct device *dev, void *res)
> +static void devm_led_release(void *cdev)
>  {
> -       struct led_classdev **p = res;
> -
> -       led_put(*p);
> +       led_put(cdev);
>  }
>
>  /**
> @@ -280,7 +278,7 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev,
>                                                   int index)
>  {
>         struct led_classdev *led;
> -       struct led_classdev **dr;
> +       int ret;
>
>         if (!dev)
>                 return ERR_PTR(-EINVAL);
> @@ -289,15 +287,9 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev,
>         if (IS_ERR(led))
>                 return led;
>
> -       dr = devres_alloc(devm_led_release, sizeof(struct led_classdev *),
> -                         GFP_KERNEL);
> -       if (!dr) {
> -               led_put(led);
> -               return ERR_PTR(-ENOMEM);
> -       }
> -
> -       *dr = led;
> -       devres_add(dev, dr);
> +       ret = devm_add_action_or_reset(dev, devm_led_release, led);
> +       if (ret)
> +               return ERR_PTR(ret);
>
>         return led;
>  }
> --
> 2.25.1
>


-- 
With Best Regards,
Andy Shevchenko