linux-kernel - Re: [PATCH] mt7530 fix mt7530_fdb

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Date:   Sat, 17 Jul 2021 21:27:48 +0200
From:   Eric Woudstra <ericwouds@...il.com>
To:     DENG Qingfang <dqfext@...il.com>
Cc:     Vladimir Oltean <olteanv@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <landen.chao@...iatek.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Frank Wunderlich <frank-w@...lic-files.de>
Subject: Re: [PATCH] mt7530 fix mt7530_fdb_write vid missing ivl bit

On Sat 17 jul. 2021 at 17:41, DENG Qingfang <dqfext@...il.com>: wrote:
>
> On Sat, Jul 17, 2021 at 10:09:53AM +0200, Eric Woudstra wrote:
> >
> > You are right now there is a problem with vlan unaware bridge.
> >
> > We need to change the line to:
> >
> > if (vid > 1) reg[1] |= ATA2_IVL;
>
> Does it not work with vid 1?

No, I also thought so, but it actually does not. I'm working here on
5.12.11, but there should not be any difference. It needs: if (vid >
1). Just tried it with (vid > 0) but then it does not work.

I really like your fix on wifi roaming, it works nicely. However I
found, still after this patch, it sadly does not work on vlan > 1. At
least it does not on 5.12.11 (the 'self' entry does not get removed
automatically, but after manual remove the client connects ok). I need
to go 5.14 one of these days because I just read DSA has a major
update. Then I also move from ubuntu focal to a more recent version.
Then I'll try wifi roaming on vlan again.

>
> >
> > I have just tested this with a vlan unaware bridge and also with vlan bridge option disabled in the kernel. Only after applying the if statement it works for vlan unaware bridges/kernel.