linux-kernel - Re: build failure of next-20220906 due to 4ec7ac90ff39 ("misc: microchip: pci1xxxx: Add power management functions

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Date:   Wed, 07 Sep 2022 10:41:39 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Sudip Mukherjee" <sudipm.mukherjee@...il.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Cc:     "Kumaravel Thiagarajan" <kumaravel.thiagarajan@...rochip.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-next <linux-next@...r.kernel.org>
Subject: Re: build failure of next-20220906 due to 4ec7ac90ff39 ("misc: microchip:
 pci1xxxx: Add power management functions - suspend & resume handlers.")

On Tue, Sep 6, 2022, at 11:07 PM, Sudip Mukherjee wrote:
> On Tue, Sep 6, 2022 at 6:15 PM Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
>> On Tue, Sep 06, 2022 at 03:23:22PM +0100, Sudip Mukherjee (Codethink) wrote:
>> >
>> > drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c:311:12: error: 'pci1xxxx_gpio_resume' defined but not used [-Werror=unused-function]
>> >   311 | static int pci1xxxx_gpio_resume(struct device *dev)
>> >       |            ^~~~~~~~~~~~~~~~~~~~
>> > drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c:295:12: error: 'pci1xxxx_gpio_suspend' defined but not used [-Werror=unused-function]
>> >   295 | static int pci1xxxx_gpio_suspend(struct device *dev)
>> >       |            ^~~~~~~~~~~~~~~~~~~~~
>> >
>> >
>> > git bisect pointed to 4ec7ac90ff39 ("misc: microchip: pci1xxxx: Add power management functions - suspend & resume handlers.").
>> >
>
> Looking at other drivers which uses SIMPLE_DEV_PM_OPS, I think
> pci1xxxx_gpio_suspend() and pci1xxxx_gpio_resume() needs to be under
> "#ifdef CONFIG_PM_SLEEP".

That would work, but a better fix is to use DEFINE_SIMPLE_DEV_PM_OPS()
in place of the deprecated SIMPLE_DEV_PM_OPS().

     Arnd