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Date:   Wed, 10 Feb 2021 21:27:32 +0100
From:   Andrew Lunn <andrew@lunn.ch>
To:     Michael Walle <michael@walle.cc>
Cc:     Russell King - ARM Linux admin <linux@armlinux.org.uk>,
        Heiner Kallweit <hkallweit1@gmail.com>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>
Subject: Re: [PATCH net-next 7/9] net: phy: icplus: select page before
 writing control register
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> I guess it boils down to: how hard should we try to get the driver
> behave correctly if the user is changing registers.

All bets are off if root starts messing with the PHY state from
userspace. Its a foot gun, don't be surprised with what happens when
you use it.

    Andrew