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Date:   Sat, 26 Sep 2020 22:25:02 +0200
From:   Andrew Lunn <>
To:     Vladimir Oltean <>
Subject: Re: [PATCH v3 net-next 06/15] net: dsa: add a generic procedure for
 the flow dissector

On Sat, Sep 26, 2020 at 10:32:06PM +0300, Vladimir Oltean wrote:
> For all DSA formats that don't use tail tags, it looks like behind the
> obscure number crunching they're all doing the same thing: locating the
> real EtherType behind the DSA tag. Nonetheless, this is not immediately
> obvious, so create a generic helper for those DSA taggers that put the
> header before the EtherType.
> Another assumption for the generic function is that the DSA tags are of
> equal length on RX and on TX. Prior to the previous patch, this was not
> true for ocelot and for gswip. The problem was resolved for ocelot, but
> for gswip it still remains, so that can't use this helper yet.
> Signed-off-by: Vladimir Oltean <>

Reviewed-by: Andrew Lunn <>


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