linux-kernel - Re: [PATCH net v3 3/4] net: phy: do not force EEE support

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Date:   Thu, 23 Feb 2023 09:54:59 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net v3 3/4] net: phy: do not force EEE support

On Wed, Feb 22, 2023 at 06:50:42AM +0100, Oleksij Rempel wrote:
> With following patches:
> commit 9b01c885be36 ("net: phy: c22: migrate to genphy_c45_write_eee_adv()")
> commit 5827b168125d ("net: phy: c45: migrate to genphy_c45_write_eee_adv()")
> 
> we set the advertisement to potentially supported values. This behavior
> may introduce new regressions on systems where EEE was disabled by
> default (BIOS or boot loader configuration or by other ways.)
> 
> At same time, with this patches, we would overwrite EEE advertisement
> configuration made over ethtool.
> 
> To avoid this issues, we need to cache initial and ethtool advertisement
> configuration and store it for later use.
> 
> Fixes: 9b01c885be36 ("net: phy: c22: migrate to genphy_c45_write_eee_adv()")
> Fixes: 5827b168125d ("net: phy: c45: migrate to genphy_c45_write_eee_adv()")
> Fixes: 022c3f87f88e ("net: phy: add genphy_c45_ethtool_get/set_eee() support")
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

Thanks!

-- 
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