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    Subject[PATCH 4.4 243/312] net: dsa: mv88e6xxx: unlock DSA and CPU ports
    Date
    From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>

    commit 65fa40276ac1318e75264e5a204547b57c2cf397 upstream.

    Locking a port generates an hardware interrupt when a new SA address is
    received. This enables CPU directed learning, which is needed for 802.1X
    MAC authentication.

    To disable automatic learning on a port, the only configuration needed
    is to set its Port Association Vector to all zero.

    Clear PAV when SA learning should be disabled instead of locking a port.

    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 | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/net/dsa/mv88e6xxx.c
    +++ b/drivers/net/dsa/mv88e6xxx.c
    @@ -2066,7 +2066,7 @@ static int mv88e6xxx_setup_port(struct d
    reg = 1 << port;
    /* Disable learning for DSA and CPU ports */
    if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
    - reg = PORT_ASSOC_VECTOR_LOCKED_PORT;
    + reg = 0;

    ret = _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_ASSOC_VECTOR, reg);
    if (ret)

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