diff --git a/drivers/infiniband/core/iwpm_msg.c b/drivers/infiniband/core/iwpm_msg.c
index e6ffa2e66c1a..22a3abee2a54 100644
--- a/drivers/infiniband/core/iwpm_msg.c
+++ b/drivers/infiniband/core/iwpm_msg.c
@@ -67,7 +67,8 @@ int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
 		err_str = "Invalid port mapper client";
 		goto pid_query_error;
 	}
-	if (iwpm_registered_client(nl_client))
+	if (iwpm_check_registration(nl_client, IWPM_REG_VALID) ||
+			iwpm_user_pid == IWPM_PID_UNAVAILABLE)
 		return 0;
 	skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client);
 	if (!skb) {
@@ -106,7 +107,6 @@ int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
 	ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
 	if (ret) {
 		skb = NULL; /* skb is freed in the netlink send-op handling */
-		iwpm_set_registered(nl_client, 1);
 		iwpm_user_pid = IWPM_PID_UNAVAILABLE;
 		err_str = "Unable to send a nlmsg";
 		goto pid_query_error;
@@ -144,12 +144,12 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 		err_str = "Invalid port mapper client";
 		goto add_mapping_error;
 	}
-	if (!iwpm_registered_client(nl_client)) {
+	if (!iwpm_valid_pid())
+		return 0;
+	if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
 		err_str = "Unregistered port mapper client";
 		goto add_mapping_error;
 	}
-	if (!iwpm_valid_pid())
-		return 0;
 	skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client);
 	if (!skb) {
 		err_str = "Unable to create a nlmsg";
@@ -214,12 +214,12 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
 		err_str = "Invalid port mapper client";
 		goto query_mapping_error;
 	}
-	if (!iwpm_registered_client(nl_client)) {
+	if (!iwpm_valid_pid())
+		return 0;
+	if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
 		err_str = "Unregistered port mapper client";
 		goto query_mapping_error;
 	}
-	if (!iwpm_valid_pid())
-		return 0;
 	ret = -ENOMEM;
 	skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client);
 	if (!skb) {
@@ -288,12 +288,12 @@ int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
 		err_str = "Invalid port mapper client";
 		goto remove_mapping_error;
 	}
-	if (!iwpm_registered_client(nl_client)) {
+	if (!iwpm_valid_pid())
+		return 0;
+	if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
 		err_str = "Unregistered port mapper client";
 		goto remove_mapping_error;
 	}
-	if (!iwpm_valid_pid())
-		return 0;
 	skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client);
 	if (!skb) {
 		ret = -ENOMEM;
@@ -388,7 +388,7 @@ int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
 	pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
 			__func__, iwpm_user_pid);
 	if (iwpm_valid_client(nl_client))
-		iwpm_set_registered(nl_client, 1);
+		iwpm_set_registration(nl_client, IWPM_REG_VALID);
 register_pid_response_exit:
 	nlmsg_request->request_done = 1;
 	/* always for found nlmsg_request */
@@ -644,7 +644,6 @@ int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX];
 	const char *msg_type = "Mapping Info response";
-	int iwpm_pid;
 	u8 nl_client;
 	char *iwpm_name;
 	u16 iwpm_version;
@@ -669,14 +668,14 @@ int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
 				__func__, nl_client);
 		return ret;
 	}
-	iwpm_set_registered(nl_client, 0);
+	iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
 	atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
+	iwpm_user_pid = cb->nlh->nlmsg_pid;
 	if (!iwpm_mapinfo_available())
 		return 0;
-	iwpm_pid = cb->nlh->nlmsg_pid;
 	pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
-		 __func__, iwpm_pid);
-	ret = iwpm_send_mapinfo(nl_client, iwpm_pid);
+		 __func__, iwpm_user_pid);
+	ret = iwpm_send_mapinfo(nl_client, iwpm_user_pid);
 	return ret;
 }
 EXPORT_SYMBOL(iwpm_mapping_info_cb);
diff --git a/drivers/infiniband/core/iwpm_util.c b/drivers/infiniband/core/iwpm_util.c
index a626795bf9c7..5fb089e91353 100644
--- a/drivers/infiniband/core/iwpm_util.c
+++ b/drivers/infiniband/core/iwpm_util.c
@@ -78,6 +78,7 @@ init_exit:
 	mutex_unlock(&iwpm_admin_lock);
 	if (!ret) {
 		iwpm_set_valid(nl_client, 1);
+		iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
 		pr_debug("%s: Mapinfo and reminfo tables are created\n",
 				__func__);
 	}
@@ -106,6 +107,7 @@ int iwpm_exit(u8 nl_client)
 	}
 	mutex_unlock(&iwpm_admin_lock);
 	iwpm_set_valid(nl_client, 0);
+	iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
 	return 0;
 }
 EXPORT_SYMBOL(iwpm_exit);
@@ -397,17 +399,23 @@ void iwpm_set_valid(u8 nl_client, int valid)
 }
 
 /* valid client */
-int iwpm_registered_client(u8 nl_client)
+u32 iwpm_get_registration(u8 nl_client)
 {
 	return iwpm_admin.reg_list[nl_client];
 }
 
 /* valid client */
-void iwpm_set_registered(u8 nl_client, int reg)
+void iwpm_set_registration(u8 nl_client, u32 reg)
 {
 	iwpm_admin.reg_list[nl_client] = reg;
 }
 
+/* valid client */
+u32 iwpm_check_registration(u8 nl_client, u32 reg)
+{
+	return (iwpm_get_registration(nl_client) & reg);
+}
+
 int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
 				struct sockaddr_storage *b_sockaddr)
 {
diff --git a/drivers/infiniband/core/iwpm_util.h b/drivers/infiniband/core/iwpm_util.h
index ee2d9ff095be..b7b9e194ce81 100644
--- a/drivers/infiniband/core/iwpm_util.h
+++ b/drivers/infiniband/core/iwpm_util.h
@@ -58,6 +58,10 @@
 #define IWPM_PID_UNDEFINED     -1
 #define IWPM_PID_UNAVAILABLE   -2
 
+#define IWPM_REG_UNDEF          0x01
+#define IWPM_REG_VALID          0x02
+#define IWPM_REG_INCOMPL        0x04
+
 struct iwpm_nlmsg_request {
 	struct list_head    inprocess_list;
 	__u32               nlmsg_seq;
@@ -88,7 +92,7 @@ struct iwpm_admin_data {
 	atomic_t refcount;
 	atomic_t nlmsg_seq;
 	int      client_list[RDMA_NL_NUM_CLIENTS];
-	int      reg_list[RDMA_NL_NUM_CLIENTS];
+	u32      reg_list[RDMA_NL_NUM_CLIENTS];
 };
 
 /**
@@ -159,19 +163,31 @@ int iwpm_valid_client(u8 nl_client);
 void iwpm_set_valid(u8 nl_client, int valid);
 
 /**
- * iwpm_registered_client - Check if the port mapper client is registered
+ * iwpm_check_registration - Check if the client registration
+ *			      matches the given one
  * @nl_client: The index of the netlink client
+ * @reg: The given registration type to compare with
  *
  * Call iwpm_register_pid() to register a client
+ * Returns true if the client registration matches reg,
+ * otherwise returns false
  */
-int iwpm_registered_client(u8 nl_client);
+u32 iwpm_check_registration(u8 nl_client, u32 reg);
 
 /**
- * iwpm_set_registered - Set the port mapper client to registered or not
+ * iwpm_set_registration - Set the client registration
  * @nl_client: The index of the netlink client
- * @reg: 1 if registered or 0 if not
+ * @reg: Registration type to set
  */
-void iwpm_set_registered(u8 nl_client, int reg);
+void iwpm_set_registration(u8 nl_client, u32 reg);
+
+/**
+ * iwpm_get_registration
+ * @nl_client: The index of the netlink client
+ *
+ * Returns the client registration type
+ */
+u32 iwpm_get_registration(u8 nl_client);
 
 /**
  * iwpm_send_mapinfo - Send local and mapped IPv4/IPv6 address info of