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

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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>
This commit is contained in:
Vivien Didelot 2016-04-14 14:42:08 -04:00 committed by Greg Kroah-Hartman
parent c94875da94
commit 6417d8fe3e
1 changed files with 2 additions and 2 deletions
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4
drivers/net/dsa/mv88e6xxx.c
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@ -2064,8 +2064,8 @@ 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);