netdev - Re: [PATCH] net: dsa: Check existence of .port_mdb

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Date:   Thu, 25 Jul 2019 15:42:09 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Chen-Yu Tsai <wens@...nel.org>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Chen-Yu Tsai <wens@...e.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: dsa: Check existence of .port_mdb_add callback
 before calling it

On Wed, Jul 24, 2019 at 11:47:02AM +0800, Chen-Yu Tsai wrote:
> From: Chen-Yu Tsai <wens@...e.org>
> 
> With the recent addition of commit 75dad2520fc3 ("net: dsa: b53: Disable
> all ports on setup"), users of b53 (BCM53125 on Lamobo R1 in my case)
> are forced to use the dsa subsystem to enable the switch, instead of
> having it in the default transparent "forward-to-all" mode.

Hi Chen-Yu

I would do the check earlier, at the beginning of
dsa_switch_mdb_add(). It is then similar to dsa_switch_mdb_del().

	      Andrew