linux-kernel - Re: [PATCH AUTOSEL 4.19 031/123] ASoC: Intel: Power down links before turning off display audio power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <475af06c-bae7-13f4-26fc-8d4a9944e25f@linux.intel.com>
Date:   Wed, 5 Dec 2018 07:34:18 -0800
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>, Sasha Levin <sashal@...nel.org>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sriram Periyasamy <sriramx.periyasamy@...el.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>
Subject: Re: [PATCH AUTOSEL 4.19 031/123] ASoC: Intel: Power down links before
 turning off display audio power

On 12/5/18 3:48 AM, Mark Brown wrote:
> On Wed, Dec 05, 2018 at 04:34:23AM -0500, Sasha Levin wrote:
>> From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
>>
>> [ Upstream commit 4c10473d6ddf12ec124c9ff71a5d23bb5388478b ]
>>
>> On certain platforms, Display HDMI HDA codec was not going to sleep state
>> after the use when links are powered down after turning off the display
>> power. As per the HW recommendation, links are powered down before turning
>> off the display power to ensure that the codec goes to sleep state.
> 
> Are we sure there's no dependencies here?

If you are referring to dependencies to other patches, not that I can 
think of. Based on timelines there isn't a strong link with 4.19: the 
patch was initially submitted in August (and missed), before v4.19 came 
out, and has also been used in 4.14 backports.