linux-kernel - Re: [PATCH[RFT]] ACPI: EC: s2idle: Avoid flushing EC work when EC GPE is inactive

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Date:   Mon, 18 May 2020 17:32:06 +0800
From:   Chris Chiu <chiu@...lessm.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH[RFT]] ACPI: EC: s2idle: Avoid flushing EC work when EC GPE
 is inactive

On Mon, May 18, 2020 at 4:59 PM Rafael J. Wysocki <rafael@...nel.org> wrote:
>
> On Thu, May 14, 2020 at 12:10 PM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> >
> > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> >
> > Flushing the EC work while suspended to idle when the EC GPE status
> > is not set causes some EC wakeup events (notably power button and
> > lid ones) to be missed after a series of spurious wakeups on the Dell
> > XPS13 9360 in my office.
> >
> > If that happens, the machine cannot be woken up from suspend-to-idle
> > by a power button press or lid status change and it needs to be woken
> > up in some other way (eg. by a key press).
> >
> > Flushing the EC work only after successful dispatching the EC GPE,
> > which means that its status has been set, avoids the issue, so change
> > the code in question accordingly.
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > ---
> >
> > Hi Chris,
> >
> > Please check if the key press wakeup still works on your system with this patch
> > applied (on top of https://patchwork.kernel.org/patch/11538065/).
>
> Hi Chris,
>
> Since I haven't heard back from you and the problem at hand is a
> regression on the machine where it happens, I'm going to push this
> patch for merging.
>
> If it causes the key press wakeup issue to reappear on your machine,
> I'm afraid that we'll need to quirk it in the EC driver.
>
> Thanks!
>

Sorry that I missed this email. I'll apply this patch and test again.