bridge: Fix fatal typo in setup of multicast_querier_expired

Unfortunately it seems that I didn't properly test the case of
an expired external querier in the recent multicast bridge series.

The setup of the timer in that case is completely broken and leads
to a NULL-pointer dereference.  This patch fixes it.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 3 deletions

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 708e84f31888..5ca4c50ea233 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -744,8 +744,7 @@ static void br_multicast_local_router_expired(unsigned long data)
 
 static void br_multicast_querier_expired(unsigned long data)
 {
-        struct net_bridge_port *port = (void *)data;
-        struct net_bridge *br = port->br;
+        struct net_bridge *br = (void *)data;
 
         spin_lock(&br->multicast_lock);
         if (!netif_running(br->dev) || br->multicast_disabled)
@@ -1581,7 +1580,7 @@ void br_multicast_init(struct net_bridge *br)
         setup_timer(&br->multicast_router_timer,
                     br_multicast_local_router_expired, 0);
         setup_timer(&br->multicast_querier_timer,
-                    br_multicast_querier_expired, 0);
+                    br_multicast_querier_expired, (unsigned long)br);
         setup_timer(&br->multicast_query_timer, br_multicast_query_expired,
                     (unsigned long)br);
 }