linux-kernel - Re: [net-next PATCH 3/3] net: dsa: qca8k: limit user ports access to the first CPU port on setup

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Message-ID: <20230726131851.w5ty2mftr7tdl3mi@skbuf>
Date:   Wed, 26 Jul 2023 16:18:51 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Atin Bainada <hi@...nb.me>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH 3/3] net: dsa: qca8k: limit user ports access to
 the first CPU port on setup

On Mon, Jul 24, 2023 at 05:30:58AM +0200, Christian Marangi wrote:
> In preparation for multi-CPU support, set CPU port LOOKUP MEMBER outside
> the port loop and setup the LOOKUP MEMBER mask for user ports only to
> the first CPU port.
> 
> This is to handle flooding condition where every CPU port is set as
> target and prevent packet duplication for unknown frames from user ports.
> 
> Secondary CPU port LOOKUP MEMBER mask will be setup later when
> port_change_master will be implemented.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---

This is kinda "net.git" material, in the sense that it fixes the current
driver behavior with device trees from the future, right?