linux-kernel - Re: [PATCH net-next] net: dsa: mt7530: manually set up VLAN ID 0

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Message-Id: <20210825035545.1836274-1-dqfext@gmail.com>
Date:   Wed, 25 Aug 2021 11:55:45 +0800
From:   DENG Qingfang <dqfext@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     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>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Russell King <linux@...linux.org.uk>,
        "open list:MEDIATEK SWITCH DRIVER" <netdev@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] net: dsa: mt7530: manually set up VLAN ID 0

On Tue, Aug 24, 2021 at 08:37:14PM +0300, Vladimir Oltean wrote:
> On Wed, Aug 25, 2021 at 01:32:37AM +0800, DENG Qingfang wrote:
> > Okay. So the Fixes tag should be 6087175b7991, which initially adds the
> > software fallback support for mt7530.
> 
> Ok. Did the old code not need VLAN 0 for VLAN-unaware ports, or are you
> saying that since the VLAN table lookup was bypassed completely in the
> old code, 'no VLAN 0' was an inconsequential error?
> 
> I think it's the latter. Just wanted to make sure. So that means, either
> this Fixes: tag or the other, the patch still belongs to net-next. From
> my side you shouldn't need to resend.

You're right. The old code does not use VLAN table lookup for VLAN-unaware
ports, and the current code set VLAN-unaware ports to fallback mode so
missing VLAN 0 will only make them fallback to SVL.

> 
> Reviewed-by: Vladimir Oltean <olteanv@...il.com>