linux-kernel - Re: [PATCH v2 3/3] gpiolib: acpi: Replace custom code with device_match_acpi

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Date:   Thu, 7 Oct 2021 18:50:46 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Wolfram Sang <wsa@...nel.org>
Subject: Re: [PATCH v2 3/3] gpiolib: acpi: Replace custom code with device_match_acpi_handle()

On Wed, Oct 6, 2021 at 7:31 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> Since driver core provides a generic device_match_acpi_handle()
> we may replace the custom code with it.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
> v2: no changes
>  drivers/gpio/gpiolib-acpi.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
> index 47712b6903b5..32f1f720b94b 100644
> --- a/drivers/gpio/gpiolib-acpi.c
> +++ b/drivers/gpio/gpiolib-acpi.c
> @@ -95,10 +95,7 @@ static bool acpi_gpio_deferred_req_irqs_done;
>
>  static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
>  {
> -       if (!gc->parent)
> -               return false;
> -
> -       return ACPI_HANDLE(gc->parent) == data;
> +       return gc->parent ? device_match_acpi_handle(gc->parent, data) : false;

return gc->parent && device_match_acpi_handle(gc->parent, data);

would work too if I'm not mistaken.

>  }
>
>  /**
> --