netdev - Re: [PATCH net] net: dsa: reference count the host mdb addresses

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Message-ID: <20201019165514.1fe7d8f3@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Mon, 19 Oct 2020 16:55:14 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com
Subject: Re: [PATCH net] net: dsa: reference count the host mdb addresses

On Fri, 16 Oct 2020 00:27:11 +0300 Vladimir Oltean wrote:
> Currently any DSA switch that implements the multicast ops (properly,
> that is) gets these errors after just sitting for a while, with at least
> 2 ports bridged:
> 
> [  286.013814] mscc_felix 0000:00:00.5 swp3: failed (err=-2) to del object (id=3)
> 
> The reason has to do with this piece of code:
> 
> 	netdev_for_each_lower_dev(dev, lower_dev, iter)
> 		br_mdb_switchdev_host_port(dev, lower_dev, mp, type);

We need a review on this one, anyone?