linux-kernel - Re: [PATCH v2 net-next] net: dsa: Never offload FDB entries on standalone ports

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Message-ID: <3799afd4-438c-5a63-c2d2-c95aafd0326c@gmail.com>
Date:   Wed, 16 Mar 2022 16:24:29 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Tobias Waldekranz <tobias@...dekranz.com>, davem@...emloft.net,
        kuba@...nel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net-next] net: dsa: Never offload FDB entries on
 standalone ports

On 3/15/22 4:30 PM, Tobias Waldekranz wrote:
> If a port joins a bridge that it can't offload, it will fallback to
> standalone mode and software bridging. In this case, we never want to
> offload any FDB entries to hardware either.
> 
> Previously, for host addresses, we would eventually end up in
> dsa_port_bridge_host_fdb_add, which would unconditionally dereference
> dp->bridge and cause a segfault.
> 
> Fixes: c26933639b54 ("net: dsa: request drivers to perform FDB isolation")
> Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>

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