linux-kernel - Re: Possible regression caused by commit a192aa923b66a

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Date:   Mon, 11 Jun 2018 23:52:34 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        P HeLiOn <perryhelionsemail@...il.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Possible regression caused by commit a192aa923b66a

On Mon, Jun 11, 2018 at 10:09 AM, Rafael J. Wysocki <rafael@...nel.org> wrote:
> On Mon, Jun 11, 2018 at 8:26 AM, Kai-Heng Feng
> <kai.heng.feng@...onical.com> wrote:
>> Hi Rafael,
>>
>> There's a regression report [1] that says commit a192aa923b66a ("ACPI /
>> LPSS: Consolidate runtime PM and system sleep handling") is the first bad
>> commit.
>>
>> From the looks of it, it didn't introduce any behavioral change. So your
>> help is appreciated.
>>
>> [1] https://bugs.launchpad.net/bugs/1774950
>
> Well, the only difference is the iosf quirk AFAICS, but that should be
> easy enough to check.  I'll try to cut a patch for that later today.

If the iosf quirk is the source of the problem, the attached patch should help.

View attachment "acpi-lpss-pm-debug.patch" of type "text/x-patch" (2389 bytes)