net: dsa: mt7530: set CPU port to fallback mode
Currently, setting a bridge's self PVID to other value and deleting
the default VID 1 renders untagged ports of that VLAN unable to talk to
the CPU port:
bridge vlan add dev br0 vid 2 pvid untagged self
bridge vlan del dev br0 vid 1 self
bridge vlan add dev sw0p0 vid 2 pvid untagged
bridge vlan del dev sw0p0 vid 1
# br0 cannot send untagged frames out of sw0p0 anymore
That is because the CPU port is set to security mode and its PVID is
still 1, and untagged frames are dropped due to VLAN member violation.
Set the CPU port to fallback mode so untagged frames can pass through.
Fixes: 83163f7dca56 ("net: dsa: mediatek: add VLAN support for MT7530")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 5c444cd..a063d91 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -810,10 +810,15 @@ mt7530_port_set_vlan_aware(struct dsa_switch *ds, int port)
PCR_MATRIX_MASK, PCR_MATRIX(MT7530_ALL_MEMBERS));
/* Trapped into security mode allows packet forwarding through VLAN
- * table lookup.
+ * table lookup. CPU port is set to fallback mode to let untagged
+ * frames pass through.
*/
- mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
- MT7530_PORT_SECURITY_MODE);
+ if (dsa_is_cpu_port(ds, port))
+ mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
+ MT7530_PORT_FALLBACK_MODE);
+ else
+ mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
+ MT7530_PORT_SECURITY_MODE);
/* Set the port as a user port which is to be able to recognize VID
* from incoming packets before fetching entry within the VLAN table.