netdev - Re: [PATCH v4 net-next 09/15] net: dsa: Never offload FDB entries on standalone ports

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Message-ID: <20220315163349.k2rmfdzrd3jvzbor@skbuf>
Date:   Tue, 15 Mar 2022 18:33:49 +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 09/15] net: dsa: Never offload FDB entries on
 standalone ports

On Tue, Mar 15, 2022 at 01:25:37AM +0100, 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.
> 
> Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
> ---

When you resend, please send this patch separately, unless something
breaks really ugly with your MST series in place.

>  net/dsa/slave.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
> index a61a7c54af20..647adee97f7f 100644
> --- a/net/dsa/slave.c
> +++ b/net/dsa/slave.c
> @@ -2624,6 +2624,9 @@ static int dsa_slave_fdb_event(struct net_device *dev,
>  	if (ctx && ctx != dp)
>  		return 0;
>  
> +	if (!dp->bridge)
> +		return 0;
> +
>  	if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
>  		if (dsa_port_offloads_bridge_port(dp, orig_dev))
>  			return 0;
> -- 
> 2.25.1
>