netdev - Re: [PATCH net-next 4/4] net: dsa: sja1105: Rethink the PHYLINK callbacks

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Date:   Sat, 8 Jun 2019 20:57:32 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     f.fainelli@...il.com, vivien.didelot@...il.com,
        davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 4/4] net: dsa: sja1105: Rethink the PHYLINK
 callbacks

On Sat, Jun 08, 2019 at 04:03:44PM +0300, Vladimir Oltean wrote:
> The first fact that needs to be stated is that the per-MAC settings in
> SJA1105 called EGRESS and INGRESS do *not* disable egress and ingress on
> the MAC. They only prevent non-link-local traffic from being
> sent/received on this port.
> 
> So instead of having .phylink_mac_config essentially mess with the STP
> state and force it to DISABLED/BLOCKING (which also brings useless
> complications in sja1105_static_config_reload), simply add the
> .phylink_mac_link_down and .phylink_mac_link_up callbacks which inhibit
> TX at the MAC level, while leaving RX essentially enabled.
> 
> Also stop from trying to put the link down in .phylink_mac_config, which
> is incorrect.
> 
> Signed-off-by: Vladimir Oltean <olteanv@...il.com>

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

    Andrew