netdev - Re: [PATCH v4 net-next 12/15] net: dsa: Handle MST state changes

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Date:   Tue, 15 Mar 2022 18:44:41 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Tobias Waldekranz <tobias@...dekranz.com>
Cc:     davem@...emloft.net, kuba@...nel.org, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Russell King <linux@...linux.org.uk>,
        Petr Machata <petrm@...dia.com>,
        Ido Schimmel <idosch@...dia.com>,
        Matt Johnston <matt@...econstruct.com.au>,
        Cooper Lees <me@...perlees.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bridge@...ts.linux-foundation.org
Subject: Re: [PATCH v4 net-next 12/15] net: dsa: Handle MST state changes

On Tue, Mar 15, 2022 at 06:42:49PM +0200, Vladimir Oltean wrote:
> Is there a requirement in br_mst_set_state() to put the switchdev
> notifier at the end instead of at the beginning?
> 
> I'm tempted to ask you to introduce br_mst_get_state(), then assign
> old_state = br_mst_get_state(dsa_port_bridge_dev_get(dp), state->msti),

dsa_port_to_bridge_port(dp), excuse me.

> then perform the VLAN fast age only on the appropriate state transitions,
> just like the regular fast age.