linux-kernel - Re: [PATCH v2 net] net: phy: mscc: Add error check when __phy

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Message-ID: <165219683693.3924.12337336334738761045@kwain>
Date:   Tue, 10 May 2022 17:33:56 +0200
From:   Antoine Tenart <atenart@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Russell King <linux@...linux.org.uk>,
        Wan Jiabing <wanjiabing@...o.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net] net: phy: mscc: Add error check when __phy_read() failed

Quoting Andrew Lunn (2022-05-10 17:08:07)
> 
> But i doubt this impacts real users. MDIO tends to either work or not
> work at all. And not working is pretty noticeable, and nobody has
> reported issues.

Right. On top of that there are other calls to __phy_read in this driver
not checking the returned value. Plus all __phy_write calls. If that was
found by code inspection I would suggest to improve the whole driver and
not this function alone.

Thanks,
Antoine