linux-kernel - Re: [PATCH 02/13] net: ravb: Use pm_runtime_resume_and

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Message-ID: <a465e1fb-6ef8-0e10-1dc9-c6a17b955d11@omp.ru>
Date:   Mon, 20 Nov 2023 22:23:57 +0300
From:   Sergey Shtylyov <s.shtylyov@....ru>
To:     Claudiu <claudiu.beznea@...on.dev>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <p.zabel@...gutronix.de>, <yoshihiro.shimoda.uh@...esas.com>,
        <geert+renesas@...der.be>, <wsa+renesas@...g-engineering.com>,
        <biju.das.jz@...renesas.com>,
        <prabhakar.mahadev-lad.rj@...renesas.com>,
        <sergei.shtylyov@...entembedded.com>,
        <mitsuhiro.kimura.kc@...esas.com>, <masaru.nagai.vx@...esas.com>
CC:     <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH 02/13] net: ravb: Use pm_runtime_resume_and_get()

On 11/20/23 11:45 AM, Claudiu wrote:

> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> pm_runtime_get_sync() may return with error. In case it returns with error
> dev->power.usage_count needs to be decremented. pm_runtime_resume_and_get()
> takes care of this. Thus use it.
> 
> Along with this pm_runtime_resume_and_get() and reset_control_deassert()
> were moved before alloc_etherdev_mqs() to simplify the error path.

   I don't see how it simplifies the error path...
   Re-ordering the statements at the end of the error path seems cheaper than
what you do.

> Also, in case pm_runtime_resume_and_get() returns error the reset signal
> is deasserted and runtime PM is disabled (by jumping to the proper
> error handling label).
> 
> Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
[...]

MBR, Sergey