Date:   Tue, 21 Feb 2023 09:36:35 +0000
From:   "Russell King (Oracle)" <linux@armlinux.org.uk>
To:     Oleksij Rempel <o.rempel@pengutronix.de>
Cc:     Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>, kernel@pengutronix.de,
        linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next v2 0/4] net: phy: EEE fixes
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References: <20230221050334.578012-1-o.rempel@pengutronix.de>
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On Tue, Feb 21, 2023 at 06:03:30AM +0100, Oleksij Rempel wrote:
> changes v2:
> - restore previous ethtool set logic for the case where advertisements
>   are not provided by user space.

I don't think the _kernel_ should be doing this - this introduces a
different behaviour to the kernel. As I already said, setting the
default advertisement in the case of ethtool -s is done by userspace
not by the kernel.

In fact, the kernel explicitly rejects an attempt to have autoneg
enabled with a zero advertising mask:

        linkmode_copy(advertising, cmd->link_modes.advertising);
        linkmode_and(advertising, advertising, phydev->supported);
        if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
                return -EINVAL;

and I think we should have a uniform behaviour with the same API,
rather than different behaviours, as that becomes quite messy.

-- 
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