net: dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add
stable inclusion from stable-5.10.15 commit 836f791aba588adb94fda349b2abca35aebc31c6 bugzilla: 48167 -------------------------------- commit f72f2fb8 upstream. 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: 88472939 ("net: dsa: mv88e6xxx: handle multiple ports in ATU") Signed-off-by: NDENG Qingfang <dqfext@gmail.com> Reviewed-by: NVladimir Oltean <olteanv@gmail.com> Link: https://lore.kernel.org/r/20210130134334.10243-1-dqfext@gmail.comSigned-off-by: NJakub Kicinski <kuba@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com> Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
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