linux-kernel - Re: [PATCH net] net: phy: marvell: Fix MDI-x polarity setting in 88e1118-compatible PHYs

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Date:   Sat, 5 Feb 2022 23:02:07 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Ron Madrid <ron_madrid@...global.net>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>, stable@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: phy: marvell: Fix MDI-x polarity setting in
 88e1118-compatible PHYs

On Sun, Feb 06, 2022 at 12:49:51AM +0300, Pavel Parkhomenko wrote:
> When setting up autonegotiation for 88E1118R and compatible PHYs,
> a software reset of PHY is issued before setting up polarity.
> This is incorrect as changes of MDI Crossover Mode bits are
> disruptive to the normal operation and must be followed by a
> software reset to take effect. Let's patch m88e1118_config_aneg()
> to fix the issue mentioned before by invoking software reset
> of the PHY just after setting up MDI-x polarity.
> 
> Fixes: 605f196efbf8 ("phy: Add support for Marvell 88E1118 PHY")
> Signed-off-by: Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>
> Reviewed-by: Serge Semin <fancer.lancer@...il.com>
> Suggested-by: Andrew Lunn <andrew@...n.ch>
> Cc: stable@...r.kernel.org

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

    Andrew