linux-kernel - Re: [PATCH v3 net-next 10/11] net: mscc: ocelot: offload bridge port flags to device

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Message-ID: <a5a4e1e8-8370-954f-ab4e-20a52f54d468@gmail.com>
Date:   Wed, 10 Feb 2021 20:20:21 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        bridge@...ts.linux-foundation.org, Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ido Schimmel <idosch@...sch.org>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Vadym Kochan <vkochan@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Ivan Vecera <ivecera@...hat.com>, linux-omap@...r.kernel.org
Subject: Re: [PATCH v3 net-next 10/11] net: mscc: ocelot: offload bridge port
 flags to device



On 2/10/2021 1:14 AM, Vladimir Oltean wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
> 
> We should not be unconditionally enabling address learning, since doing
> that is actively detrimential when a port is standalone and not offloading
> a bridge. Namely, if a port in the switch is standalone and others are
> offloading the bridge, then we could enter a situation where we learn an
> address towards the standalone port, but the bridged ports could not
> forward the packet there, because the CPU is the only path between the
> standalone and the bridged ports. The solution of course is to not
> enable address learning unless the bridge asks for it.
> 
> We need to set up the initial port flags for no learning and flooding
> everything, then the bridge takes over. The flood configuration was
> already configured ok in ocelot_init, we just need to disable learning
> in ocelot_init_port.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian