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net: dsa: ksz: Add STP multicast handling

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In case the destination address is link local, add override bit into the
switch tag to let such a packet through the switch even if the port is
blocked.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tristram Ha <Tristram.Ha@microchip.com>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Cc: Woojung Huh <woojung.huh@microchip.com>
Cc: David S. Miller <davem@davemloft.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marek Vasut 2018-12-15 01:58:06 +01:00 committed by David S. Miller
parent bafe9ba7d9
commit 8a75b9d4c9
1 changed files with 4 additions and 0 deletions
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net/dsa/tag_ksz.c
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@ -110,6 +110,10 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb,
addr = skb_mac_header(nskb);
*tag = BIT(dp->index);
if (is_link_local_ether_addr(addr))
*tag |= KSZ9477_TAIL_TAG_OVERRIDE;
*tag = cpu_to_be16(*tag);
return nskb;