Re: [PATCH] media: nxp: ignore unused suspend operations

[Hans Verkuil]

Hi Arnd,

On 18/04/2023 09:15, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> gcc warns about some functions being unused when CONFIG_PM is
> disabled:

???

The Kconfig has a:

        depends on HAS_DMA && PM

So how can this be compiled with CONFIG_PM not set?

Am I missing something?

	Hans

> 
> drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c:328:12: error: 'mxc_isi_pm_resume' defined but not used [-Werror=unused-function]
>   328 | static int mxc_isi_pm_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~
> drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c:314:12: error: 'mxc_isi_pm_suspend' defined but not used [-Werror=unused-function]
>   314 | static int mxc_isi_pm_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~
> 
> Use the modern SYSTEM_SLEEP_PM_OPS()/RUNTIME_PM_OPS() helpers in place
> of the old SET_SYSTEM_SLEEP_PM_OPS()/SET_RUNTIME_PM_OPS() ones, and add
> a pm_ptr() check to ensure they get dropped by the compiler.
> 
> Fixes: cf21f328fcaf ("media: nxp: Add i.MX8 ISI driver")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
> index 238521622b75..253e77189b69 100644
> --- a/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
> +++ b/drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c
> @@ -378,8 +378,8 @@ static int mxc_isi_runtime_resume(struct device *dev)
>  }
>  
>  static const struct dev_pm_ops mxc_isi_pm_ops = {
> -	SET_SYSTEM_SLEEP_PM_OPS(mxc_isi_pm_suspend, mxc_isi_pm_resume)
> -	SET_RUNTIME_PM_OPS(mxc_isi_runtime_suspend, mxc_isi_runtime_resume, NULL)
> +	SYSTEM_SLEEP_PM_OPS(mxc_isi_pm_suspend, mxc_isi_pm_resume)
> +	RUNTIME_PM_OPS(mxc_isi_runtime_suspend, mxc_isi_runtime_resume, NULL)
>  };
>  
>  /* -----------------------------------------------------------------------------
> @@ -528,7 +528,7 @@ static struct platform_driver mxc_isi_driver = {
>  	.driver = {
>  		.of_match_table = mxc_isi_of_match,
>  		.name		= MXC_ISI_DRIVER_NAME,
> -		.pm		= &mxc_isi_pm_ops,
> +		.pm		= pm_ptr(&mxc_isi_pm_ops),
>  	}
>  };
>  module_platform_driver(mxc_isi_driver);