linux-kernel - Re: [PATCH] regulator: Fix resume from suspend to idle

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Message-ID: <CAPKp9uaqpgF=DjhYxQFUV97ps_1SdhhmhMkDBoT8XapvvunKDQ@mail.gmail.com>
Date:   Wed, 14 Feb 2018 14:00:38 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        linux-renesas-soc@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>,
        Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH] regulator: Fix resume from suspend to idle

On Tue, Feb 13, 2018 at 9:37 AM, Geert Uytterhoeven
<geert+renesas@...der.be> wrote:
> When resuming from idle with the new suspend mode configuration support
> we go through the resume callbacks with a state of PM_SUSPEND_TO_IDLE
> which we don't have regulator constraints for, causing an error:
>
>     dpm_run_callback(): regulator_resume_early+0x0/0x64 returns -22
>     PM: Device regulator.0 failed to resume early: error -22
>
> Avoid this and similar errors by treating missing constraints as a noop.
>
> See also commit 57a0dd187956ea04 ("regulator: Fix suspend to idle"),
> which fixed the suspend part.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

Tested-by: Sudeep Holla <sudeep.holla@....com>