netdev - Re: [RFC PATCH v2 linux-next 13/14] net: dsa: sja1105: expose the SGMII PCS as an mdio

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Message-ID: <20210526152911.GH30436@shell.armlinux.org.uk>
Date:   Wed, 26 May 2021 16:29:11 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [RFC PATCH v2 linux-next 13/14] net: dsa: sja1105: expose the
 SGMII PCS as an mdio_device

On Wed, May 26, 2021 at 04:55:34PM +0300, Vladimir Oltean wrote:
> Since we touch all PCS accessors again, now it is a good time to check
> for error codes from the hardware access as well. We can't propagate the
> errors very far due to phylink returning void for mac_config and
> mac_link_up, but at least we print them to the console.

phylink doesn't have much option on what it could do if we error out at
those points - I suppose we could print a non-specific error and then
lock-out the interface in a similar way that phylib does, but to me that
seems really unfriendly if you're remotely accessing a box and the error
is intermittent.

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