linux-kernel - Re: [char-misc for 4.10-rc4 V2] mei: bus: enable OS version only for SPT and newer

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Message-ID: <aac5b255-e817-f92d-2f37-2ca7b52cd957@molgen.mpg.de>
Date:   Wed, 11 Jan 2017 11:20:09 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     Jan Niehusmann <jan@...dor.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexander Usyskin <alexander.usyskin@...el.com>,
        linux-kernel@...r.kernel.org, Yu C Chen <yu.c.chen@...el.com>,
        "Sarvela, Tomi P" <tomi.p.sarvela@...el.com>,
        Thorsten Leemhuis <linux@...mhuis.info>,
        Daniel Blueman <daniel@...ra.org>,
        Len Brown <len.brown@...el.com>
Subject: Re: [char-misc for 4.10-rc4 V2] mei: bus: enable OS version only for
 SPT and newer

Dear Tomas,


On 01/11/17 10:24, Winkler, Tomas wrote:
>>
>> On Wed, Jan 11, 2017 at 01:27:21AM +0200, Tomas Winkler wrote:
>>> On older platforms the command should be just ignored by the firmware
>>> but some older platforms misbehave so it's safer to send the command
>>> only if required.
>>
>> Thanks! This fixes suspend-to-ram for me (on a Thinkpad x201s).
>
> What about Dell XPS13?

With Linus’ master branch from today, and Greg’s char-misc-linus merged 
(Merge: 807b93e995d1 546cf3ef9c92), the regression is still there.

I am now building a Linux kernel image with the two commits touching 
`bus-fixup.c` reverted.

Do you want me to open a separate bug report for that, or continue 
debugging in the existing report [1], which is currently marked as resolved?

Do you have Kaby Lake devices sitting around for testing?


Kind regards,

Paul


[1] https://bugzilla.kernel.org/show_bug.cgi?id=192051
     "[Bug 192051] [bisected] No hibernation/suspend/shutdown after 
commit 7279b238badec09efd0545293e64c21feee97f73"