[v1] mpi3mr: Validating SAS port assignments

diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h
index dc2cdd5f0311..3822efe349e1 100644
--- a/drivers/scsi/mpi3mr/mpi3mr.h
+++ b/drivers/scsi/mpi3mr/mpi3mr.h
@@ -541,8 +541,8 @@  struct mpi3mr_hba_port {
  * @port_list: List of ports belonging to a SAS node
  * @num_phys: Number of phys associated with port
  * @marked_responding: used while refresing the sas ports
- * @lowest_phy: lowest phy ID of current sas port
- * @phy_mask: phy_mask of current sas port
+ * @lowest_phy: lowest phy ID of current sas port, valid for controller port
+ * @phy_mask: phy_mask of current sas port, valid for controller port
  * @hba_port: HBA port entry
  * @remote_identify: Attached device identification
  * @rphy: SAS transport layer rphy object
diff --git a/drivers/scsi/mpi3mr/mpi3mr_transport.c b/drivers/scsi/mpi3mr/mpi3mr_transport.c
index ccd23def2e0c..3a685750f5cd 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_transport.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_transport.c
@@ -595,7 +595,7 @@  static enum sas_linkrate mpi3mr_convert_phy_link_rate(u8 link_rate)
  */
 static void mpi3mr_delete_sas_phy(struct mpi3mr_ioc *mrioc,
 	struct mpi3mr_sas_port *mr_sas_port,
-	struct mpi3mr_sas_phy *mr_sas_phy)
+	struct mpi3mr_sas_phy *mr_sas_phy, u8 host_node)
 {
 	u64 sas_address = mr_sas_port->remote_identify.sas_address;
 
@@ -605,9 +605,13 @@  static void mpi3mr_delete_sas_phy(struct mpi3mr_ioc *mrioc,
 
 	list_del(&mr_sas_phy->port_siblings);
 	mr_sas_port->num_phys--;
-	mr_sas_port->phy_mask &= ~(1 << mr_sas_phy->phy_id);
-	if (mr_sas_port->lowest_phy == mr_sas_phy->phy_id)
-		mr_sas_port->lowest_phy = ffs(mr_sas_port->phy_mask) - 1;
+
+	if (host_node) {
+		mr_sas_port->phy_mask &= ~(1 << mr_sas_phy->phy_id);
+
+		if (mr_sas_port->lowest_phy == mr_sas_phy->phy_id)
+			mr_sas_port->lowest_phy = ffs(mr_sas_port->phy_mask) - 1;
+	}
 	sas_port_delete_phy(mr_sas_port->port, mr_sas_phy->phy);
 	mr_sas_phy->phy_belongs_to_port = 0;
 }
@@ -617,12 +621,13 @@  static void mpi3mr_delete_sas_phy(struct mpi3mr_ioc *mrioc,
  * @mrioc: Adapter instance reference
  * @mr_sas_port: Internal Port object
  * @mr_sas_phy: Internal Phy object
+ * @host_node: Flag to indicate this is a host_node
  *
  * Return: None.
  */
 static void mpi3mr_add_sas_phy(struct mpi3mr_ioc *mrioc,
 	struct mpi3mr_sas_port *mr_sas_port,
-	struct mpi3mr_sas_phy *mr_sas_phy)
+	struct mpi3mr_sas_phy *mr_sas_phy, u8 host_node)
 {
 	u64 sas_address = mr_sas_port->remote_identify.sas_address;
 
@@ -632,9 +637,12 @@  static void mpi3mr_add_sas_phy(struct mpi3mr_ioc *mrioc,
 
 	list_add_tail(&mr_sas_phy->port_siblings, &mr_sas_port->phy_list);
 	mr_sas_port->num_phys++;
-	mr_sas_port->phy_mask |= (1 << mr_sas_phy->phy_id);
-	if (mr_sas_phy->phy_id < mr_sas_port->lowest_phy)
-		mr_sas_port->lowest_phy = ffs(mr_sas_port->phy_mask) - 1;
+	if (host_node) {
+		mr_sas_port->phy_mask |= (1 << mr_sas_phy->phy_id);
+
+		if (mr_sas_phy->phy_id < mr_sas_port->lowest_phy)
+			mr_sas_port->lowest_phy = ffs(mr_sas_port->phy_mask) - 1;
+	}
 	sas_port_add_phy(mr_sas_port->port, mr_sas_phy->phy);
 	mr_sas_phy->phy_belongs_to_port = 1;
 }
@@ -675,7 +683,7 @@  static void mpi3mr_add_phy_to_an_existing_port(struct mpi3mr_ioc *mrioc,
 			if (srch_phy == mr_sas_phy)
 				return;
 		}
-		mpi3mr_add_sas_phy(mrioc, mr_sas_port, mr_sas_phy);
+		mpi3mr_add_sas_phy(mrioc, mr_sas_port, mr_sas_phy, mr_sas_node->host_node);
 		return;
 	}
 }
@@ -736,7 +744,7 @@  static void mpi3mr_del_phy_from_an_existing_port(struct mpi3mr_ioc *mrioc,
 				mpi3mr_delete_sas_port(mrioc, mr_sas_port);
 			else
 				mpi3mr_delete_sas_phy(mrioc, mr_sas_port,
-				    mr_sas_phy);
+				    mr_sas_phy, mr_sas_node->host_node);
 			return;
 		}
 	}
@@ -1367,7 +1375,8 @@  static struct mpi3mr_sas_port *mpi3mr_sas_port_add(struct mpi3mr_ioc *mrioc,
 	mpi3mr_sas_port_sanity_check(mrioc, mr_sas_node,
 	    mr_sas_port->remote_identify.sas_address, hba_port);
 
-	if (mr_sas_node->num_phys >= sizeof(mr_sas_port->phy_mask) * 8)
+	if (mr_sas_node->host_node && mr_sas_node->num_phys >=
+			sizeof(mr_sas_port->phy_mask) * 8)
 		ioc_info(mrioc, "max port count %u could be too high\n",
 		    mr_sas_node->num_phys);
 
@@ -1377,7 +1386,7 @@  static struct mpi3mr_sas_port *mpi3mr_sas_port_add(struct mpi3mr_ioc *mrioc,
 		    (mr_sas_node->phy[i].hba_port != hba_port))
 			continue;
 
-		if (i >= sizeof(mr_sas_port->phy_mask) * 8) {
+		if (mr_sas_node->host_node && (i >= sizeof(mr_sas_port->phy_mask) * 8)) {
 			ioc_warn(mrioc, "skipping port %u, max allowed value is %zu\n",
 			    i, sizeof(mr_sas_port->phy_mask) * 8);
 			goto out_fail;
@@ -1385,7 +1394,8 @@  static struct mpi3mr_sas_port *mpi3mr_sas_port_add(struct mpi3mr_ioc *mrioc,
 		list_add_tail(&mr_sas_node->phy[i].port_siblings,
 		    &mr_sas_port->phy_list);
 		mr_sas_port->num_phys++;
-		mr_sas_port->phy_mask |= (1 << i);
+		if (mr_sas_node->host_node)
+			mr_sas_port->phy_mask |= (1 << i);
 	}
 
 	if (!mr_sas_port->num_phys) {
@@ -1394,7 +1404,8 @@  static struct mpi3mr_sas_port *mpi3mr_sas_port_add(struct mpi3mr_ioc *mrioc,
 		goto out_fail;
 	}
 
-	mr_sas_port->lowest_phy = ffs(mr_sas_port->phy_mask) - 1;
+	if (mr_sas_node->host_node)
+		mr_sas_port->lowest_phy = ffs(mr_sas_port->phy_mask) - 1;
 
 	if (mr_sas_port->remote_identify.device_type == SAS_END_DEVICE) {
 		tgtdev = mpi3mr_get_tgtdev_by_addr(mrioc,