linux-kernel - Aw: Re: [net v2] net: ethernet: mtk_eth_soc: drop generic vlan rx offload, only use DSA untagging

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Message-ID: <trinity-a7837941-a0d2-4f38-aa65-0f0bd4759624-1682531537098@3c-app-gmx-bs05>
Date:   Wed, 26 Apr 2023 19:52:17 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>
Cc:     Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org, Felix Fietkau <nbd@....name>,
        John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        stable@...r.kernel.org
Subject: Aw: Re: [net v2] net: ethernet: mtk_eth_soc: drop generic vlan rx
 offload, only use DSA untagging

Hi
> Gesendet: Mittwoch, 26. April 2023 um 19:25 Uhr
> Von: "Arınç ÜNAL" <arinc.unal@...nc9.com>

> > tested this on bananapi-r3 on non-dsa gmac1 and dsa eth0 (wan).
> > on both vlan is working, but maybe it breaks HW-vlan-untagging
> 
> I'm confused by this. What is HW-vlan-untagging, and which SoCs do you 
> think this patch would break this feature? How can I utilise this 
> feature on Linux so I can confirm whether it works or not?

oh, you mean my wording about "hw-vlan-untagging"...i mean the hw vlan offload feature which may
not be working on non-mt7621/7622 devices as i have no idea how to check this. i hope felix can
answer this. at least the feature activeated on mt7986 breaks sw-vlan on the gmac1 (without
switch).

regards Frank