netdev - Re: mv88e6240 configuration broken for B850v3

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Message-ID: <Ya7BvzxrpJT9dvDA@lunn.ch>
Date:   Tue, 7 Dec 2021 03:06:55 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     "Russell King (Oracle)" <linux@...linux.org.uk>,
        Martyn Welch <martyn.welch@...labora.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, kernel@...labora.com
Subject: Re: mv88e6240 configuration broken for B850v3

> > mv88e6xxx_software_reset() does not fully reinitialise the switch.
> > To quote one switch manual for the SWReset bit "Register values are not
> > modified." That means if the link was forced down previously by writing
> > to the port control register, the port remains forced down until
> > software changes that register to unforce the link, or to force the
> > link up.
> 
> Ouch, this is pretty unfortunate if true.

Come on. Do you really think Russell is making this up?

     Andrew