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-rw-r--r--net/bridge/br_multicast.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index f701a21acb34..fdbd41c76ec4 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -719,7 +719,8 @@ static int br_multicast_add_group(struct net_bridge *br,
719 goto err; 719 goto err;
720 720
721 if (!port) { 721 if (!port) {
722 hlist_add_head(&mp->mglist, &br->mglist); 722 if (hlist_unhashed(&mp->mglist))
723 hlist_add_head(&mp->mglist, &br->mglist);
723 mod_timer(&mp->timer, now + br->multicast_membership_interval); 724 mod_timer(&mp->timer, now + br->multicast_membership_interval);
724 goto out; 725 goto out;
725 } 726 }