linux-kernel - Re: [PATCH v2] usb: dwc3: st: Switch from CONFIG_PM_SLEEP guards to pm_sleep

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Message-ID: <20250110023709.hizhtf7o7day7c64@synopsys.com>
Date: Fri, 10 Jan 2025 02:37:11 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Raphael Gallais-Pou <rgallaispou@...il.com>
CC: Patrice Chotard <patrice.chotard@...s.st.com>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] usb: dwc3: st: Switch from CONFIG_PM_SLEEP guards to
 pm_sleep_ptr()

On Thu, Jan 09, 2025, Raphael Gallais-Pou wrote:
> Letting the compiler remove these functions when the kernel is built
> without CONFIG_PM_SLEEP support is simpler and less error prone than the
> use of #ifdef based kernel configuration guards.
> 
> Signed-off-by: Raphael Gallais-Pou <rgallaispou@...il.com>
> ---
> Changes in v2:
>   - Split serie in single patches
>   - Remove irrelevant 'Link:' from commit log
>   - Link to v1: https://urldefense.com/v3/__https://lore.kernel.org/r/20241229-update_pm_macro-v1-1-c7d4c4856336@gmail.com__;!!A4F2R9G_pg!e8eD9plJTlBfv3F2PIKo9M_iJd5FS75w9XuozUEOxjdPYLk08Q0x78HpwPg-qAgYHmtAiHqIeHZEnN9JtJ2o0LK80Q$ 
> ---
>  drivers/usb/dwc3/dwc3-st.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
> index e16c3237180e..ef7c43008946 100644
> --- a/drivers/usb/dwc3/dwc3-st.c
> +++ b/drivers/usb/dwc3/dwc3-st.c
> @@ -309,7 +309,6 @@ static void st_dwc3_remove(struct platform_device *pdev)
>  	reset_control_assert(dwc3_data->rstc_rst);
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
>  static int st_dwc3_suspend(struct device *dev)
>  {
>  	struct st_dwc3 *dwc3_data = dev_get_drvdata(dev);
> @@ -343,9 +342,8 @@ static int st_dwc3_resume(struct device *dev)
>  
>  	return 0;
>  }
> -#endif /* CONFIG_PM_SLEEP */
>  
> -static SIMPLE_DEV_PM_OPS(st_dwc3_dev_pm_ops, st_dwc3_suspend, st_dwc3_resume);
> +static DEFINE_SIMPLE_DEV_PM_OPS(st_dwc3_dev_pm_ops, st_dwc3_suspend, st_dwc3_resume);
>  
>  static const struct of_device_id st_dwc3_match[] = {
>  	{ .compatible = "st,stih407-dwc3" },
> @@ -360,7 +358,7 @@ static struct platform_driver st_dwc3_driver = {
>  	.driver = {
>  		.name = "usb-st-dwc3",
>  		.of_match_table = st_dwc3_match,
> -		.pm = &st_dwc3_dev_pm_ops,
> +		.pm = pm_sleep_ptr(&st_dwc3_dev_pm_ops),
>  	},
>  };
>  
> -- 
> 2.47.1
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>

Thanks,
Thinh