linux-kernel - Re: [PATCH v2 04/10] leds: aw200xx: use devm API to cleanup module's resources

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Message-ID: <CAHp75VeNhGFtmjQOR5K52bmb3t6ufqtMoS-1mLkk_swDgO+-gg@mail.gmail.com>
Date:   Mon, 4 Dec 2023 20:16:24 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     George Stark <gnstark@...utedevices.com>
Cc:     pavel@....cz, lee@...nel.org, vadimp@...dia.com,
        mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu,
        hdegoede@...hat.com, mazziesaccount@...il.com, jic23@...nel.org,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, kernel@...utedevices.com
Subject: Re: [PATCH v2 04/10] leds: aw200xx: use devm API to cleanup module's resources

On Mon, Dec 4, 2023 at 8:07 PM George Stark <gnstark@...utedevices.com> wrote:
>
> In this driver LEDs are registered using devm_led_classdev_register()
> so they are automatically unregistered after module's remove() is done.
> led_classdev_unregister() calls module's led_set_brightness() to turn off
> the LEDs and that callback uses resources which were destroyed already
> in module's remove() so use devm API instead of remove().

...

> +static void aw200xx_chip_reset_action(void *data)
> +{
> +       const struct aw200xx *chip = (struct aw200xx *)data;
> +
> +       aw200xx_chip_reset(chip);
> +}
> +
> +static void aw200xx_disable_action(void *data)
> +{
> +       const struct aw200xx *chip = (struct aw200xx *)data;
> +
> +       aw200xx_disable(chip);
> +}

They can be made oneliners.

...

> +       if (devm_mutex_init(&client->dev, &chip->mutex))
> +               return -ENOMEM;

Do not shadow the real error code.

-- 
With Best Regards,
Andy Shevchenko