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Message-ID: <BN8PR11MB3668C521DFE3ED67E101F150E9499@BN8PR11MB3668.namprd11.prod.outlook.com>
Date:   Thu, 15 Sep 2022 06:05:09 +0000
From:   <Kumaravel.Thiagarajan@...rochip.com>
To:     <renzhijie2@...wei.com>, <arnd@...db.de>,
        <gregkh@...uxfoundation.org>
CC:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sudipm.mukherjee@...il.com>
Subject: RE: [PATCH -next] misc: microchip: pci1xxxx: Fix build error
 unused-function

> -----Original Message-----
> From: Ren Zhijie <renzhijie2@...wei.com>
> Sent: Thursday, September 15, 2022 8:46 AM
> To: Kumaravel Thiagarajan - I21417
> <Kumaravel.Thiagarajan@...rochip.com>; arnd@...db.de;
> gregkh@...uxfoundation.org
> Cc: linux-gpio@...r.kernel.org; linux-kernel@...r.kernel.org; Ren Zhijie
> <renzhijie2@...wei.com>
> Subject: [PATCH -next] misc: microchip: pci1xxxx: Fix build error unused-
> function
> 
> If CONFIG_PM_SLEEP is not set,
> make ARCH=x86_64, will be failed, like this:
> 
> drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c:311:12: error:
> ‘pci1xxxx_gpio_resume’ defined but not used [-Werror=unused-function]
> 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]
> static int pci1xxxx_gpio_suspend(struct device *dev)
>             ^~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
> 
> commit 1a3c7bb08826 ("PM: core: Add new *_PM_OPS macros, deprecate
> old ones"), add new marco DEFINE_SIMPLE_DEV_PM_OPS to fix this
> unused-function problem.
> 
> Fixes: 4ec7ac90ff39 ("misc: microchip: pci1xxxx: Add power management
> functions - suspend & resume handlers.")
> Signed-off-by: Ren Zhijie <renzhijie2@...wei.com>
> ---
>  drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
> b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
> index 9cc771c604ed..4cd541166b0c 100644
> --- a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
> +++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
> @@ -405,7 +405,7 @@ static int pci1xxxx_gpio_probe(struct auxiliary_device
> *aux_dev,
>         return devm_gpiochip_add_data(&aux_dev->dev, &priv->gpio, priv);  }
> 
> -static SIMPLE_DEV_PM_OPS(pci1xxxx_gpio_pm_ops,
> pci1xxxx_gpio_suspend, pci1xxxx_gpio_resume);
> +static DEFINE_SIMPLE_DEV_PM_OPS(pci1xxxx_gpio_pm_ops,
> +pci1xxxx_gpio_suspend, pci1xxxx_gpio_resume);
> 
>  static const struct auxiliary_device_id pci1xxxx_gpio_auxiliary_id_table[] = {
>         {.name = "mchp_pci1xxxx_gp.gp_gpio"},
> --
> 2.17.1
This issue was already reported by Sudip <sudipm.mukherjee@...il.com> and already a patch is queued and
in review https://patchwork.ozlabs.org/project/linux-gpio/patch/20220912113634.167820-1-kumaravel.thiagarajan@microchip.com/

Thank You.

Regards,
Kumaravel

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