[NET]: Remove neigh hash expansion into already locked section.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/neighbour.c

@@ -406,12 +406,6 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
 		goto out;
 	}
 
-	if (tbl->entries > (tbl->hash_mask + 1)) {
-		write_lock_bh(&tbl->lock);
-		neigh_hash_grow(tbl, (tbl->hash_mask + 1) << 1);
-		write_unlock_bh(&tbl->lock);
-	}
-
 	memcpy(n->primary_key, pkey, key_len);
 	n->dev = dev;
 	dev_hold(dev);
@@ -433,6 +427,9 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
 
 	write_lock_bh(&tbl->lock);
 
+	if (tbl->entries > (tbl->hash_mask + 1)) {
+		neigh_hash_grow(tbl, (tbl->hash_mask + 1) << 1);
+
 	hash_val = tbl->hash(pkey, dev) & tbl->hash_mask;
 
 	if (n->parms->dead) {