net: dsa: sja1105: Reverse TPID and TPID2
authorVladimir Oltean <olteanv@gmail.com>
Sat, 8 Jun 2019 12:04:31 +0000 (15:04 +0300)
committerDavid S. Miller <davem@davemloft.net>
Sat, 8 Jun 2019 22:20:40 +0000 (15:20 -0700)
>From reading the P/Q/R/S user manual, it appears that TPID is used by
the switch for detecting S-tags and TPID2 for C-tags.  Their meaning is
not clear from the E/T manual.

Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/dsa/sja1105/sja1105_main.c

index 8ee63f2e6529ed82969daf1a24afe5337321dc30..ecb54b82859359922c3774ef8c102bfbf70c82b4 100644 (file)
@@ -1421,8 +1421,8 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 
        if (enabled) {
                /* Enable VLAN filtering. */
-               tpid  = ETH_P_8021Q;
-               tpid2 = ETH_P_8021AD;
+               tpid  = ETH_P_8021AD;
+               tpid2 = ETH_P_8021Q;
        } else {
                /* Disable VLAN filtering. */
                tpid  = ETH_P_SJA1105;
@@ -1431,7 +1431,9 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 
        table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
        general_params = table->entries;
+       /* EtherType used to identify outer tagged (S-tag) VLAN traffic */
        general_params->tpid = tpid;
+       /* EtherType used to identify inner tagged (C-tag) VLAN traffic */
        general_params->tpid2 = tpid2;
 
        rc = sja1105_static_config_reload(priv);