netdev - Re: mv88e6xxx broken on 6176 with "Disentangle STU from VTU"

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Date:   Fri, 18 Mar 2022 20:20:33 +0100
From:   Tobias Waldekranz <tobias@...dekranz.com>
To:     Marek Behún <kabel@...nel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vladimir Oltean <olteanv@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: mv88e6xxx broken on 6176 with "Disentangle STU from VTU"

On Fri, Mar 18, 2022 at 18:28, Marek Behún <kabel@...nel.org> wrote:
> Hello Tobias,
>
> mv88e6xxx fails to probe in net-next on Turris Omnia, bisect leads to
> commit
>   49c98c1dc7d9 ("net: dsa: mv88e6xxx: Disentangle STU from VTU")

Oh wow, really sorry about that! I have it reproduced, and I understand
the issue.

> Trace:
>   mv88e6xxx_setup
>     mv88e6xxx_setup_port
>       mv88e6xxx_port_vlan_join(MV88E6XXX_VID_STANDALONE) OK
>       mv88e6xxx_port_vlan_join(MV88E6XXX_VID_BRIDGED) -EOPNOTSUPP
>

Thanks, that make it easy to find. There is a mismatch between what the
family-info struct says and what the chip-specific ops struct supports.

I'll try to send a fix ASAP.