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

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Message-ID: <b54c3eb6-6373-3679-4561-272b8f249a7b@linaro.org>
Date:   Wed, 14 Dec 2022 15:51:54 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>,
        "Rafael J. Wysocki" <rafael@...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


Hi Johan,

thanks for your fixes

On 14/12/2022 14:16, Johan Hovold 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.
> 
> Johan
> 
> 
> Johan Hovold (4):
>    thermal/drivers/qcom: fix set_trip_temp() deadlock
>    thermal/drivers/exynos: fix set_trip_temp() deadlock
>    thermal/drivers/tegra: fix set_trip_temp() deadlock
>    thermal/drivers/qcom: fix lock inversion
> 
>   drivers/thermal/qcom/qcom-spmi-temp-alarm.c | 7 ++++++-
>   drivers/thermal/samsung/exynos_tmu.c        | 2 +-
>   drivers/thermal/tegra/soctherm.c            | 2 +-
>   drivers/thermal/thermal_core.c              | 1 +
>   include/linux/thermal.h                     | 2 ++
>   5 files changed, 11 insertions(+), 3 deletions(-)
> 

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