netdev - Re: [PATCH net-next v2] net: dsa: mv88e6xxx: don't set non-existing learn2all bit for 6220/6250

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Date:   Mon, 14 Dec 2020 18:15:48 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] net: dsa: mv88e6xxx: don't set non-existing
 learn2all bit for 6220/6250

On Thu, 10 Dec 2020 12:06:44 +0100 Rasmus Villemoes wrote:
> The 6220 and 6250 switches do not have a learn2all bit in global1, ATU
> control register; bit 3 is reserverd.
> 
> On the switches that do have that bit, it is used to control whether
> learning frames are sent out the ports that have the message_port bit
> set. So rather than adding yet another chip method, use the existence
> of the ->port_setup_message_port method as a proxy for determining
> whether the learn2all bit exists (and should be set).
> 
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>

Applied.