javadoc fixes

Change-Id: I3b4fc2d99f42b2413a535fb411b9c19bdd186ad8
diff --git a/openflow/api/src/main/java/org/onlab/onos/openflow/controller/driver/OpenFlowAgent.java b/openflow/api/src/main/java/org/onlab/onos/openflow/controller/driver/OpenFlowAgent.java
index 6b73efc..468d3ae 100644
--- a/openflow/api/src/main/java/org/onlab/onos/openflow/controller/driver/OpenFlowAgent.java
+++ b/openflow/api/src/main/java/org/onlab/onos/openflow/controller/driver/OpenFlowAgent.java
@@ -95,7 +95,8 @@
      * Notifies the controller that role assertion has failed.
      *
      * @param dpid the switch that failed role assertion
-     * @param role the failed role
+     * @param requested the role controller requested
+     * @param response role reply from the switch
      */
     public void returnRoleReply(Dpid dpid, RoleState requested, RoleState response);
 }