bridge: implement multicast fast leave

V3: make it a flag
V2: make the toggle per-port

Fast leave allows bridge to immediately stops the multicast
traffic on the port receives IGMP Leave when IGMP snooping is enabled,
no timeouts are observed.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 2391bae4f733..a2a7a1a79081 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1225,7 +1225,7 @@ static void br_multicast_leave_group(struct net_bridge *br,
         if (!mp)
                 goto out;
 
-        if (port && port->multicast_fast_leave) {
+        if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
                 struct net_bridge_port_group __rcu **pp;
 
                 for (pp = &mp->ports;