- * This routine should be invoked by users who receive messages on a
- * connected QP before an RTU has been received.
+ * This routine should be invoked by users to notify the CM of relevant
+ * communication events. Events that should be reported to the CM and
+ * when to report them are:
+ *
+ * IB_EVENT_COMM_EST - Used when a message is received on a connected
+ * QP before an RTU has been received.
+ * IB_EVENT_PATH_MIG - Notifies the CM that the connection has failed over
+ * to the alternate path.