linux-kernel - Re: [PATCH net-next v1 3/4] net: phy: do not force EEE support

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Date:   Mon, 20 Feb 2023 14:21:42 +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-next v1 3/4] net: phy: do not force EEE support

On Mon, Feb 20, 2023 at 02:56:04PM +0100, Oleksij Rempel wrote:
>  	if (data->eee_enabled) {
> +		phydev->eee_enabled = true;
>  		if (data->advertised)
> -			adv[0] = data->advertised;
> -		else
> -			linkmode_copy(adv, phydev->supported_eee);
> +			phydev->advertising_eee[0] = data->advertised;

There is a behavioural change here that isn't mentioned in the patch
description - if data->advertised was zero, you were setting the
link modes to the full EEE supported set. After this patch, you
appear to leave advertising_eee untouched (so whatever it was.)

Which is the correct behaviour for this interface?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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