linux-kernel - Re: [PATCH v2] gpio: merrifield: Fix build err without CONFIG

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Date:   Fri, 5 Apr 2019 17:50:09 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Yue Haibing <yuehaibing@...wei.com>
Cc:     linus.walleij@...aro.org, bgolaszewski@...libre.com,
        rjw@...ysocki.net, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2] gpio: merrifield: Fix build err without CONFIG_ACPI

On Fri, Apr 05, 2019 at 10:21:12PM +0800, Yue Haibing wrote:
> From: YueHaibing <yuehaibing@...wei.com>
> 
> When building CONFIG_ACPI is not set
> gcc warn this:
> 
> drivers/gpio/gpio-merrifield.c: In function mrfld_gpio_get_pinctrl_dev_name:
> drivers/gpio/gpio-merrifield.c:388:19: error: dereferencing pointer to incomplete type struct acpi_device
>    put_device(&adev->dev);
>                    ^
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Fixes:d00d2109c367 ("gpio: merrifield: Convert to use acpi_dev_get_first_match_dev()")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Thank you for an update, I have a comment below, but before sending v3, let
Rafael to have a chance to look at it.

>  #ifdef CONFIG_ACPI
>  extern int acpi_platform_notify(struct device *dev, enum kobject_action action);
> +
> +static inline void put_acpi_device(struct acpi_device *adev)
> +{
> +	put_device(&adev->dev);
> +}

This should probably go to acpi_bus.h under acpi_dev_get_first_match_dev().
And talking to Mika we agreed that naming would be better as acpi_dev_put().

-- 
With Best Regards,
Andy Shevchenko