linux-kernel - Re: [PATCH] PM: hibernate: Allow hybrid sleep to work with s2idle

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Date:   Mon, 24 Oct 2022 19:12:36 -0500
From:   "Limonciello, Mario" <mario.limonciello@....com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     kolAflash <kolAflash@...ahilft.de>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Pavel Machek <pavel@....cz>,
        Len Brown <len.brown@...el.com>
Subject: Re: [PATCH] PM: hibernate: Allow hybrid sleep to work with s2idle

On 10/12/2022 22:50, Mario Limonciello wrote:
> Hybrid sleep is currently hardcoded to only operate with S3 even
> on systems that might not support it.
> 
> Instead of assuming this mode is what the user wants to use, for
> hybrid sleep follow the setting of `mem_sleep_current` which
> will respect mem_sleep_default kernel command line and policy
> decisions made by the presence of the FADT low power idle bit.
> 
> Reported-and-tested-by: kolAflash <kolAflash@...ahilft.de>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=216574
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
>   kernel/power/hibernate.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

Hi Rafael,

This got sent near the merge window a few weeks ago.  It's a trivial fix 
so I just want to make sure it didn't get misplaced.

Thanks!

> 
> diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
> index 89c71fce225dd..537dd3beafc16 100644
> --- a/kernel/power/hibernate.c
> +++ b/kernel/power/hibernate.c
> @@ -641,7 +641,7 @@ static void power_down(void)
>   	int error;
>   
>   	if (hibernation_mode == HIBERNATION_SUSPEND) {
> -		error = suspend_devices_and_enter(PM_SUSPEND_MEM);
> +		error = suspend_devices_and_enter(mem_sleep_current);
>   		if (error) {
>   			hibernation_mode = hibernation_ops ?
>   						HIBERNATION_PLATFORM :