netdev - Re: [PATCH net-next 3/9] net: phy: c45: don't accept disabled EEE modes in genphy_c45_ethtool_set

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Message-ID: <Z4I4ADNO1nSdZRja@shell.armlinux.org.uk>
Date: Sat, 11 Jan 2025 09:21:04 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Heiner Kallweit <hkallweit1@...il.com>
Cc: Paolo Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
	David Miller <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Simon Horman <horms@...nel.org>,
	Andrew Lunn <andrew@...n.ch>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 3/9] net: phy: c45: don't accept disabled EEE
 modes in genphy_c45_ethtool_set_eee

On Sat, Jan 11, 2025 at 10:06:02AM +0100, Heiner Kallweit wrote:
> Link modes in phydev->eee_disabled_modes are filtered out by
> genphy_c45_write_eee_adv() and won't be advertised. Therefore
> don't accept such modes from userspace.

Why do we need this? Surely if the MAC doesn't support modes, then they
should be filtered out of phydev->supported_eee so that userspace knows
that the mode is not supported by the network interface as a whole, just
like we do for phydev->supported.

That would give us the checking here.

-- 
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