From: Vivien Didelot vivien.didelot@savoirfairelinux.com
commit 996ecb8246676100af2a4dc1cfed747712a3c85f upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/dsa/mv88e6xxx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -2064,8 +2064,8 @@ static int mv88e6xxx_setup_port(struct d * 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);