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net: dsa: Fix duplicate frames flooded by learning

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[ 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 <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>
Reviewed-by: Vivien Didelot <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Florian Fainelli 2020-03-22 13:58:50 -07:00 • committed by Greg Kroah-Hartman
commit 60e975088b
1 changed files with 2 additions and 0 deletions
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2
net/dsa/tag_brcm.c
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@ -140,6 +140,8 @@ static struct sk_buff *brcm_tag_rcv_ll(struct sk_buff *skb,
/* Remove Broadcom tag and update checksum */
skb_pull_rcsum(skb, BRCM_TAG_LEN);
skb->offload_fwd_mark = 1;
return skb;
}
#endif