linux-kernel - Re: [PATCH 1/2] soundwire: qcom: fix unbalanced pm_runtime

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Message-ID: <ZHQ2HMflBM6rKMrw@matsya>
Date:   Mon, 29 May 2023 10:50:28 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Péter Ujfalusi 
        <peter.ujfalusi@...ux.intel.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/2] soundwire: qcom: fix unbalanced pm_runtime_put()

On 17-05-23, 18:37, Krzysztof Kozlowski wrote:
> This reverts commit 57ed510b0547 ("soundwire: qcom: use
> pm_runtime_resume_and_get()") which introduced unbalanced
> pm_runtime_put(), when device did not have runtime PM enabled.
> 
> If pm_runtime_resume_and_get() failed with -EACCES, the driver continued
> execution and finally called pm_runtime_put_autosuspend().  Since
> pm_runtime_resume_and_get() drops the usage counter on every error, this
> lead to double decrement of that counter visible in certain debugfs
> actions on unattached devices (still in reset state):

Applied, thanks

-- 
~Vinod