netdev - Re: [PATCH net-next 2/2] net: dsa: rzn1-a5psw: disable learning for standalone ports

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Message-ID: <20230330152008.ji5mrwbpzklylpck@skbuf>
Date:   Thu, 30 Mar 2023 18:20:08 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Clément Léger <clement.leger@...tlin.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>,
        linux-renesas-soc@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Herve Codina <herve.codina@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Milan Stevanovic <milan.stevanovic@...com>,
        Jimmy Lalande <jimmy.lalande@...com>,
        Pascal Eberhard <pascal.eberhard@...com>,
        Alexis Lothoré <alexis.lothore@...tlin.com>
Subject: Re: [PATCH net-next 2/2] net: dsa: rzn1-a5psw: disable learning for
 standalone ports

On Thu, Mar 30, 2023 at 10:34:08AM +0200, Clément Léger wrote:
> When port are in standalone mode, they should have learning disabled to
> avoid adding new entries in the MAC lookup table which might be used by
> other bridge ports to forward packets. While adding that, also make sure
> learning is enabled for CPU port.
> 
> Signed-off-by: Clément Léger <clement.leger@...tlin.com>
> ---

Usually I prefer this kind of change to be treated as a bug and
backported to older trees, because we see reports of setups which don't
work due to it. For example, see commit 15f7cfae912e ("net: dsa:
microchip: make learning configurable and keep it off while standalone")
which has a Fixes: tag.