netdev - Re: [RFC PATCH 7/9] net: dsa: install VLANs into the master's RX filter too

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Message-ID: <eee4158c-fa0b-eb1e-1a3e-1b81341ebca4@gmail.com>
Date:   Sat, 19 Sep 2020 19:43:25 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>, netdev@...r.kernel.org,
        davem@...emloft.net
Cc:     andrew@...n.ch, vivien.didelot@...il.com, idosch@...sch.org,
        jiri@...nulli.us, kurt.kanzenbach@...utronix.de, kuba@...nel.org
Subject: Re: [RFC PATCH 7/9] net: dsa: install VLANs into the master's RX
 filter too



On 9/19/2020 6:47 PM, Vladimir Oltean wrote:
> Most DSA switch tags shift the EtherType to the right, causing the
> master to not parse the VLAN as VLAN.
> However, not all switches do that (example: tail tags, tag_8021q etc),
> and if the DSA master has "rx-vlan-filter: on" in ethtool -k, then we
> have a problem.
> 
> Therefore, we could populate the VLAN table of the master, just in case
> (for some switches it will not make a difference), so that network I/O
> can work even with a VLAN filtering master.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian