netdev - [PATCH net 0/3] Fix VLAN checks for SJA1105 DSA tc-flower filters

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Message-Id: <20200616235843.756413-1-olteanv@gmail.com>
Date:   Wed, 17 Jun 2020 02:58:40 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     netdev@...r.kernel.org
Cc:     andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com,
        kuba@...nel.org
Subject: [PATCH net 0/3] Fix VLAN checks for SJA1105 DSA tc-flower filters

From: Vladimir Oltean <vladimir.oltean@....com>

This fixes a ridiculous situation where the driver, in VLAN-unaware
mode, would refuse accepting any tc filter:

tc filter replace dev sw1p3 ingress flower skip_sw \
	dst_mac 42:be:24:9b:76:20 \
	action gate (...)
Error: sja1105: Can only gate based on {DMAC, VID, PCP}.

tc filter replace dev sw1p3 ingress protocol 802.1Q flower skip_sw \
	vlan_id 1 vlan_prio 0 dst_mac 42:be:24:9b:76:20 \
	action gate (...)
Error: sja1105: Can only gate based on DMAC.

So, without changing the VLAN awareness state, it says it doesn't want
VLAN-aware rules, and it doesn't want VLAN-unaware rules either. One
would say it's in Schrodinger's state...

Now, the situation has been made worse by commit 7f14937facdc ("net:
dsa: sja1105: keep the VLAN awareness state in a driver variable"),
which made VLAN awareness a ternary attribute, but after inspecting the
code from before that patch with a truth table, it looks like the
logical bug was there even before.

While attempting to fix this, I also noticed some leftover debugging
code in one of the places that needed to be fixed. It would have
appeared in the context of patch 3/3 anyway, so I decided to create a
patch that removes it.

Vladimir Oltean (3):
  net: dsa: sja1105: remove debugging code in sja1105_vl_gate
  net: dsa: sja1105: fix checks for VLAN state in redirect action
  net: dsa: sja1105: fix checks for VLAN state in gate action

 drivers/net/dsa/sja1105/sja1105_vl.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

-- 
2.25.1