net: dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add

Having multiple destination ports for a unicast address does not make
sense.
Make port_db_load_purge override existent unicast portvec instead of
adding a new port bit.

Fixes: 884729399260 ("net: dsa: mv88e6xxx: handle multiple ports in ATU")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20210130134334.10243-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index eafe6bedc692e283fcf3a125f00d634c3e2c5500..54aa942eedaa6c28d15db3acb95b59520726ee40 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1676,7 +1676,11 @@ static int mv88e6xxx_port_db_load_purge(struct mv88e6xxx_chip *chip, int port,
                if (!entry.portvec)
                        entry.state = 0;
        } else {
-               entry.portvec |= BIT(port);
+               if (state == MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC)
+                       entry.portvec = BIT(port);
+               else
+                       entry.portvec |= BIT(port);
+
                entry.state = state;
        }