linux-kernel - Re: [PATCH v2] media: venus: core: Fix runtime PM imbalance in venus

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Date:   Wed, 24 Jun 2020 17:25:17 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Dinghao Liu <dinghao.liu@....edu.cn>,
        linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
        Aditya Pakki <pakki001@....edu>,
        Navid Emamdoost <emamd001@....edu>, Kangjie Lu <kjlu@....edu>,
        Qiushi Wu <wu000273@....edu>, Andy Gross <agross@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: Re: [PATCH v2] media: venus: core: Fix runtime PM imbalance in
 venus_probe

I propose to combine two tags in the previous patch subject.

> pm_runtime_get_sync() increments the runtime PM usage counter even
> when it returns an error code. Thus a pairing decrement is needed on
> the error handling path to keep the counter balanced. For other error
> paths after this call, things are the same.

How do you think about a wording variant like the following?

   Change description:
   The PM runtime usage counter is incremented even if a call of
   the function “pm_runtime_get_sync” failed. Thus decrement it also
   in error cases so that the reference counting is kept consistent.

   Add also a call of the function “pm_runtime_get_noresume”
   in one if branch for the completion of the desired exception handling.

Would you like to add the tag “Fixes” to the commit message?

Regards,
Markus