RDMA/cma: Add RDMA_CM_EVENT_TIMEWAIT_EXIT event

Consumers that want to re-use their QPs in new connections need to
know when the QP has exited the timewait state.  Report the timewait
event through the rdma_cm.

Signed-off-by: Amir Vadai <amirv@mellanox.co.il>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/include/rdma/rdma_cm.h b/include/rdma/rdma_cm.h
index 001d606..df7faf0 100644
--- a/include/rdma/rdma_cm.h
+++ b/include/rdma/rdma_cm.h
@@ -58,7 +58,8 @@
 	RDMA_CM_EVENT_DEVICE_REMOVAL,
 	RDMA_CM_EVENT_MULTICAST_JOIN,
 	RDMA_CM_EVENT_MULTICAST_ERROR,
-	RDMA_CM_EVENT_ADDR_CHANGE
+	RDMA_CM_EVENT_ADDR_CHANGE,
+	RDMA_CM_EVENT_TIMEWAIT_EXIT
 };
 
 enum rdma_port_space {