netdev - Re: [PATCH net-next v5 02/23] net: phy: add genphy_c45_read_eee

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Date:   Tue, 7 Feb 2023 01:44:28 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Wei Fang <wei.fang@....com>,
        Heiner Kallweit <hkallweit1@...il.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Arun.Ramadoss@...rochip.com, intel-wired-lan@...ts.osuosl.org
Subject: Re: [PATCH net-next v5 02/23] net: phy: add
 genphy_c45_read_eee_abilities() function

> +	/* The 802.3 2018 standard says the top 2 bits are reserved and should
> +	 * read as 0. Also, it seems unlikely anybody will build a PHY which
> +	 * supports 100GBASE-R deep sleep all the way down to 100BASE-TX EEE.
> +	 * If MDIO_PCS_EEE_ABLE is 0xffff assume EEE is not supported.
> +	 */
> +	if (val == GENMASK(15, 0))
> +		return 0;

Given the comment says 0xffff i would just use 0xffff, not GENMASK.

Other than that:

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew