[TIPC]: Use correct upper bound when validating network zone number.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/core.c b/net/tipc/core.c
index 3d0a8ee..31c7dd5 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -198,7 +198,7 @@
 	tipc_max_publications = 10000;
 	tipc_max_subscriptions = 2000;
 	tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536);
-	tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 511);
+	tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 255);
 	tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1);
 	tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047);
 	tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047);