linux-kernel - Re: [PATCH 0/4] thermal: fix locking regressions in linux-next

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Date:   Wed, 14 Dec 2022 15:37:43 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Johan Hovold <johan+linaro@...nel.org>
Cc:     Amit Kucheria <amitk@...nel.org>,
        Thara Gopinath <thara.gopinath@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH 0/4] thermal: fix locking regressions in linux-next

On 14/12/2022 15:02, Rafael J. Wysocki wrote:
> On Wed, Dec 14, 2022 at 2:18 PM Johan Hovold <johan+linaro@...nel.org> wrote:
>>
>> This series fixes some of the fallout after the thermal changes that
>> just landed in linux-next.
>>
>> Lockdep reported a lock inversion in one of the Qualcomm drivers and a
>> closer review revealed that the changes had also broken the sysfs
>> interface for at least three drivers.
>>
>> Note that a simple revert of the offending patches was not an option as
>> some of the infrastructure that the old implementation relied on has
>> also been removed.
> 
> I've dropped that material from my linux-next branch and Daniel,
> please also remove it from your branch that is pulled by linux-next so
> that it doesn't show up in there until 6.2-rc1 is out.
> 
> It clearly is not ready for merging in its current form.

I rebased a linux-next branch without the generic trip points rework.

It can be inverted with the other changes without conflicts.

I've pushed the branch in case you want to have a look. If you think it 
is acceptable in this form, I can send a tagged PR for 6.2-rc1 again.

> It is still present in my bleeding-edge branch, though, so please
> apply the patches from Johan on top of it and send a new PR to me, so
> I can add it back to my linux-next branch once 6.2-rc1 appears.
> 
> It would be good to check the code again too for any more similar fallout.

I've been through already, the exynos fix is not necessary. But anyway, 
I agree we should keep these changes for the next release, it is better.


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