Commit dfddfa8c authored Mar 22, 2020 by Florian Fainelli Committed by Greg Kroah-Hartman Apr 02, 2020

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: 5037d532 ("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>

parent 81494b38

net/dsa/tag_brcm.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -84,6 +84,8 @@ static struct sk_buff brcm_tag_xmit(struct sk_buff skb, struct net_device *dev
		brcm_tag[2] = BRCM_IG_DSTMAP2_MASK;
		brcm_tag[3] = (1 << p->port) & BRCM_IG_DSTMAP1_MASK;

		skb->offload_fwd_mark = 1;

		return skb;

		out_free: