linux-kernel - Re: [PATCH] intel-vbtn: match power button on press rather than release

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Date:   Mon, 7 Aug 2017 02:38:07 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Darren Hart <dvhart@...radead.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Mario Limonciello <mario.limonciello@...l.com>,
        AceLan Kao <acelan.kao@...onical.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Len Brown <lenb@...nel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH] intel-vbtn: match power button on press rather than release

On Mon, Aug 7, 2017 at 1:24 AM, Darren Hart <dvhart@...radead.org> wrote:
> On Sun, Aug 06, 2017 at 12:20:22AM +0200, Rafael Wysocki wrote:
>> On Saturday, August 5, 2017 10:57:53 PM CEST Darren Hart wrote:
>> > On Sat, Aug 05, 2017 at 01:30:20AM +0200, Rafael Wysocki wrote:
>> > > On Friday, August 4, 2017 7:29:53 PM CEST Darren Hart wrote:
>> > > > On Fri, Aug 04, 2017 at 12:00:06PM -0500, Mario Limonciello wrote:
>> > > > > This fixes a problem where the system gets stuck in a loop
>> > > > > unable to wakeup via power button in s2idle.
>> > > > >
>> > > > > The problem happens because:
>> > > > >  - press power button:
>> > > > >    - system emits 0xc0 (power press), event ignored
>> > > > >    - system emits 0xc1 (power release), event processed,
>> > > > >      emited as KEY_POWER
>> > > > >    - set wakeup_mode to true
>> > > > >    - system goes to s2idle
>> > > > >  - press power button
>> > > > >    - system emits 0xc0 (power press), wakeup_mode is true,
>> > > > >      system wakes
>> > > > >    - system emits 0xc1 (power release), event processed,
>> > > > >      emited as KEY_POWER
>> > > > >    - system goes to s2idle again
>> > > > >
>> > > > > To avoid this situation, process the presses (which matches what
>> > > > > intel-hid does too).
>> > > > >
>> > > > > Verified on an Dell XPS 9365
>> > > > >
>> > > > > Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
>> > > >
>> > > > This looks good to me - responding to the release is non-intuitive IMHO
>> > > > anyway.  I'd like to see agreement from AceLan, but this should go into
>> > > > the 4.13 rc cycle (at rc3 currently).
>> > >
>> > > Yes, it should, and I'm not sure if the original author's opinion matters here.
>> > >
>> > > The patch makes sense to everyone involved and fixes an annoying issue, so
>> > > I don't see any real arguments against applying it.
>> > >
>> > > Please feel free to add my ACK to it if that helps.
>> >
>> > I always try to give those in MAINTAINERS a chance to respond, but I will queue
>> > this up to fixes now.
>>
>> Thanks!
>
> Rafael,
>
> Merged to mainline (in case you were waiting on this for the dependent
> patch you mentioned).

Awesome, thanks!