Make sure multicast, broadcast, and zero mac's cannot be the output of rlb
updates, which should all be directed arps. Receive load balancing will be
collapsed if any of these happen, as the switch will broadcast.

Signed-off-by: Debabrata Banerjee <dbane...@akamai.com>

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index c5ac160..1b45378 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -453,7 +453,7 @@ static void rlb_update_client(struct rlb_client_info 
*client_info)
 {
        int i;
 
-       if (!client_info->slave)
+       if (!client_info->slave || !is_valid_ether_addr(client_info->mac_dst))
                return;
 
        for (i = 0; i < RLB_ARP_BURST_SIZE; i++) {
-- 
2.8.0

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