net: dsa: mv88e6xxx: enable SA learning on DSA ports

In multi-chip systems, DSA Tag ports must learn SA addresses in order to
correctly switch frames between interconnected chips.

This fixes cross-chip hardware bridging in a VLAN filtering aware
system, because a bridge group gets implemented as an hardware 802.1Q
VLAN and thus DSA and user ports share the same FDB.

Fixes: 4c7ea3c0791e ("net: dsa: mv88e6xxx: disable SA learning for DSA and CPU ports")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 028ebe2..169c948 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -2476,8 +2476,8 @@ static int mv88e6xxx_setup_port(struct dsa_switch *ds, int port)
         * the other bits clear.
         */
        reg = 1 << port;
-       /* Disable learning for DSA and CPU ports */
-       if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
+       /* Disable learning for CPU port */
+       if (dsa_is_cpu_port(ds, port))
                reg = 0;
 
        ret = _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_ASSOC_VECTOR, reg);