linux-kernel - Re: [PATCH] Input: cros_ec_keyb: Remove check before calling pm_wakeup

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Date:   Mon, 6 Aug 2018 09:15:42 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Ravi Chandra Sadineni <ravisadineni@...omium.org>,
        Ravi Chandra Sadineni <ravisadineni@...gle.com>,
        Todd Broch <tbroch@...gle.com>,
        lkml <linux-kernel@...r.kernel.org>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH] Input: cros_ec_keyb: Remove check before calling
 pm_wakeup_event.

Hi Dmitry

On 2018-08-06 08:16, Dmitry Torokhov wrote:
> On Sun, Aug 5, 2018 at 10:29 PM Marek Szyprowski
> <m.szyprowski@...sung.com> wrote:
>> Hi Ravi,
>>
>> On 2018-08-03 18:53, Ravi Chandra Sadineni wrote:
>>> Understood. I am trying to reproduce this issue locally. Wanted to
>>> know the version of the kernel so I can give a try. Marek, can you
>>> please confirm the kernel version.
>>>
>> Yes, sorry for the missing context, I was in hurry writing the report and
>> I wanted to send it before leaving the office. I'm testing mainline on Snow
>> with exynos_defconfig.
>>
>> Suspend/resume is partially broken already with mainline, but if you disable
>> CPUfreq support, it works fine on Linux v4.17.
>>
>> I've posted CPUfreq related fixes here if you are interested:
>> https://patchwork.kernel.org/patch/10554607/
>> https://patchwork.kernel.org/patch/10554603/
>>
>> The issue with cros_ec_keyb patch appears first on Linux v4.18-rc1, which is
>> the first release with that patch.
> Marek, this patch should only be in -next, I do not believe I sent it
> to Linus just yet. If mainline is broken for you it can't be caused by
> this patch.

Aaahh. My fault then. The suspend/resume issue is cause by commit
38ba34a43dbc ("Input: cros_ec_keyb - mark cros_ec_keyb driver as wake
enabled device."), which has been merged to v4.18-rc1.

It looks that I've downloaded wrong patch from the patchwork to reply it
with a a bug report. :( I'm really sorry for the noise in the wrong thread.

Ravi: please let me know how can I help you to debug this issue.

>
>> Linux -next from 20180803, which has a few
>> more patches for cros_ec_keyb suffers from the same issue.
> Just to confirm, if you revert only this patch from -next you get
> suspend/resume back?
>
> Thanks.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland