linux-kernel - Re: [PATCH] dmaengine: stm32-mdma: call pm_runtime_put if pm_runtime_get

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Message-ID: <873bfb31-52d8-7c9b-5480-4a94dc945307@web.de>
Date:   Wed, 3 Jun 2020 20:52:27 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Navid Emamdoost <navid.emamdoost@...il.com>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com
Cc:     Alexandre Torgue <alexandre.torgue@...com>,
        Dan Williams <dan.j.williams@...el.com>,
        Navid Emamdoost <emamd001@....edu>, Kangjie Lu <kjlu@....edu>,
        Stephen McCamant <smccaman@....edu>,
        Qiushi Wu <wu000273@....edu>, Vinod Koul <vkoul@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] dmaengine: stm32-mdma: call pm_runtime_put if
 pm_runtime_get_sync fails

> Calling pm_runtime_get_sync increments the counter even in case of
> failure, causing incorrect ref count. Call pm_runtime_put if
> pm_runtime_get_sync fails.

Is it appropriate to copy a sentence from the change description
into the patch subject?

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

   The PM runtime reference counter is generally incremented by a call of
   the function “pm_runtime_get_sync”.
   Thus call the function “pm_runtime_put” also in two error cases
   to keep the reference counting consistent.

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

Regards,
Markus