linux-kernel - Re: [PATCH 22/26] drm: vboxvideo: Remove #ifdef guards for PM related functions

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Date:   Mon, 7 Nov 2022 20:43:23 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Paul Cercueil <paul@...pouillou.net>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 22/26] drm: vboxvideo: Remove #ifdef guards for PM related
 functions

Hi,

On 11/7/22 18:52, Paul Cercueil wrote:
> Use the pm_sleep_ptr() macro to handle the .suspend / .resume callbacks.
> 
> This macro allows the suspend and resume functions to be automatically
> dropped by the compiler when CONFIG_SUSPEND is disabled, without having
> to use #ifdef guards.
> 
> This has the advantage of always compiling these functions in,
> independently of any Kconfig option. Thanks to that, bugs and other
> regressions are subsequently easier to catch.
> 
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> ---
> Cc: Hans de Goede <hdegoede@...hat.com>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans


> ---
>  drivers/gpu/drm/vboxvideo/vbox_drv.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> index f4f2bd79a7cb..79318441ed7e 100644
> --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c
> +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> @@ -102,7 +102,6 @@ static void vbox_pci_remove(struct pci_dev *pdev)
>  	vbox_hw_fini(vbox);
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
>  static int vbox_pm_suspend(struct device *dev)
>  {
>  	struct vbox_private *vbox = dev_get_drvdata(dev);
> @@ -160,16 +159,13 @@ static const struct dev_pm_ops vbox_pm_ops = {
>  	.poweroff = vbox_pm_poweroff,
>  	.restore = vbox_pm_resume,
>  };
> -#endif
>  
>  static struct pci_driver vbox_pci_driver = {
>  	.name = DRIVER_NAME,
>  	.id_table = pciidlist,
>  	.probe = vbox_pci_probe,
>  	.remove = vbox_pci_remove,
> -#ifdef CONFIG_PM_SLEEP
> -	.driver.pm = &vbox_pm_ops,
> -#endif
> +	.driver.pm = pm_sleep_ptr(&vbox_pm_ops),
>  };
>  
>  DEFINE_DRM_GEM_FOPS(vbox_fops);