1 files changed, 21 insertions, 22 deletions

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index cb3e97b..57bf05c 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -71,10 +71,17 @@ static inline int br_mac_hash(const unsigned char *mac)
 	return jhash_1word(key, fdb_salt) & (BR_HASH_SIZE - 1);
 }
 
+static void fdb_rcu_free(struct rcu_head *head)
+{
+	struct net_bridge_fdb_entry *ent
+		= container_of(head, struct net_bridge_fdb_entry, rcu);
+	kmem_cache_free(br_fdb_cache, ent);
+}
+
 static inline void fdb_delete(struct net_bridge_fdb_entry *f)
 {
 	hlist_del_rcu(&f->hlist);
-	br_fdb_put(f);
+	call_rcu(&f->rcu, fdb_rcu_free);
 }
 
 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
@@ -226,33 +233,26 @@ struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 	return NULL;
 }
 
-/* Interface used by ATM hook that keeps a ref count */
-struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
-					unsigned char *addr)
+#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
+/* Interface used by ATM LANE hook to test
+ * if an addr is on some other bridge port */
+int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
 {
 	struct net_bridge_fdb_entry *fdb;
+	int ret;
+
+	if (!dev->br_port)
+		return 0;
 
 	rcu_read_lock();
-	fdb = __br_fdb_get(br, addr);
-	if (fdb && !atomic_inc_not_zero(&fdb->use_count))
-		fdb = NULL;
+	fdb = __br_fdb_get(dev->br_port->br, addr);
+	ret = fdb && fdb->dst->dev != dev &&
+		fdb->dst->state == BR_STATE_FORWARDING;
 	rcu_read_unlock();
-	return fdb;
-}
-
-static void fdb_rcu_free(struct rcu_head *head)
-{
-	struct net_bridge_fdb_entry *ent
-		= container_of(head, struct net_bridge_fdb_entry, rcu);
-	kmem_cache_free(br_fdb_cache, ent);
-}
 
-/* Set entry up for deletion with RCU  */
-void br_fdb_put(struct net_bridge_fdb_entry *ent)
-{
-	if (atomic_dec_and_test(&ent->use_count))
-		call_rcu(&ent->rcu, fdb_rcu_free);
+	return ret;
 }
+#endif /* CONFIG_ATM_LANE */
 
 /*
  * Fill buffer with forwarding table records in
@@ -326,7 +326,6 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
 	fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
 	if (fdb) {
 		memcpy(fdb->addr.addr, addr, ETH_ALEN);
-		atomic_set(&fdb->use_count, 1);
 		hlist_add_head_rcu(&fdb->hlist, head);
 
 		fdb->dst = source;