batman-adv: remove duplicate code from function is_bidirectional_neigh()

In function is_bidirectional_neigh the code that find out the one hop
neighbor is duplicated.
Signed-off-by: Daniele Furlan <daniele.furlan@gmail.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>

net/batman-adv/routing.c

@@ -169,42 +169,12 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 	uint8_t orig_eq_count, neigh_rq_count, tq_own;
 	int tq_asym_penalty, ret = 0;
 
-	if (orig_node == orig_neigh_node) {
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(tmp_neigh_node, node,
-					 &orig_node->neigh_list, list) {
-
-			if (!compare_eth(tmp_neigh_node->addr,
-					 orig_neigh_node->orig))
-				continue;
-
-			if (tmp_neigh_node->if_incoming != if_incoming)
-				continue;
-
-			if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
-				continue;
-
-			neigh_node = tmp_neigh_node;
-		}
-		rcu_read_unlock();
-
-		if (!neigh_node)
-			neigh_node = create_neighbor(orig_node,
-						     orig_neigh_node,
-						     orig_neigh_node->orig,
-						     if_incoming);
-		if (!neigh_node)
-			goto out;
-
-		neigh_node->last_valid = jiffies;
-	} else {
-		/* find packet count of corresponding one hop neighbor */
+	/* find corresponding one hop neighbor */
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(tmp_neigh_node, node,
 				 &orig_neigh_node->neigh_list, list) {
 
-			if (!compare_eth(tmp_neigh_node->addr,
-					 orig_neigh_node->orig))
+		if (!compare_eth(tmp_neigh_node->addr, orig_neigh_node->orig))
 			continue;
 
 		if (tmp_neigh_node->if_incoming != if_incoming)
@@ -214,6 +184,7 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 			continue;
 
 		neigh_node = tmp_neigh_node;
+		break;
 	}
 	rcu_read_unlock();
 
@@ -222,12 +193,17 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 					     orig_neigh_node,
 					     orig_neigh_node->orig,
 					     if_incoming);
+
 	if (!neigh_node)
 		goto out;
-	}
+
+	/* if orig_node is direct neighbour update neigh_node last_valid */
+	if (orig_node == orig_neigh_node)
+		neigh_node->last_valid = jiffies;
 
 	orig_node->last_valid = jiffies;
 
+	/* find packet count of corresponding one hop neighbor */
 	spin_lock_bh(&orig_node->ogm_cnt_lock);
 	orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
 	neigh_rq_count = neigh_node->real_packet_count;