linux-kernel - Re: [PATCH net] net: ethernet: ave: Remove duplicate suspend/resume calls for phy

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Message-ID: <6d2e3944-68f0-1443-b017-13d66650e17a@socionext.com>
Date:   Sun, 23 Oct 2022 02:29:57 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: ethernet: ave: Remove duplicate suspend/resume
 calls for phy

Hi,

On 2022/10/22 5:55, Heiner Kallweit wrote:
> On 21.10.2022 19:45, Kunihiko Hayashi wrote:
>> Since AVE has its own suspend/resume functions, there is no need to call
>> mdio_bus suspend/resume functions. Set phydev->mac_managed_pm to true
>> to avoid the calls.
>>
> The commit description doesn't make clear (any longer) what the issue
> is that you're fixing. You should mention the WARN_ON() dump here
> like in your first attempt.

Indeed, I forgot to mention the WARN_ON() dump issue.

>> In addition, ave_open() executes __phy_resume() via phy_start() in
>> ave_resume(), so no need to call phy_resume() explicitly. Remove it.
>>
> This sounds like an improvement, being independent of the actual fix.
> The preferred approach would be:
> - submit the fix to net
> - submit the improvement in a separate patch to net-next

Ah, I see.
The one is for fixing WARN_ON() dump, and the other isn't affected
by the behavior, but it should be duplicate removal.

I'll separate it into two patches.

Thank you,

---
Best Regards
Kunihiko Hayashi