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net: dsa: Fix duplicate frames flooded by learning 

[ Upstream commit 0e62f543bed03a64495bd2651d4fe1aa4bcb7fe5 ]

When both the switch and the bridge are learning about new addresses,
switch ports attached to the bridge would see duplicate ARP frames
because both entities would attempt to send them.

Fixes: 5037d532b8 ("net: dsa: add Broadcom tag RX/TX handler")
Reported-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Florian Fainelli 2020-03-22 13:58:50 -07:00 committed by Greg Kroah-Hartman
parent dccb6b9beb
commit c5980c7153
1 changed files with 2 additions and 0 deletions
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2
net/dsa/tag_brcm.c
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@ -134,6 +134,8 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev,
skb->dev = ds->ports[source_port].netdev;
skb->offload_fwd_mark = 1;
return skb;
}