1 files changed, 58 insertions, 6 deletions

diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index dd075627e605..5a625c3fddae 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -41,6 +41,7 @@ struct sas_host_attrs {
         struct mutex lock;
         u32 next_target_id;
         u32 next_expander_id;
+        int next_port_id;
 };
 #define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
 
@@ -146,6 +147,7 @@ static int sas_host_setup(struct transport_container *tc, struct device *dev,
         mutex_init(&sas_host->lock);
         sas_host->next_target_id = 0;
         sas_host->next_expander_id = 0;
+        sas_host->next_port_id = 0;
         return 0;
 }
 
@@ -327,7 +329,7 @@ sas_phy_protocol_attr(identify.target_port_protocols,
 sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
                 unsigned long long);
 sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
-//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", u8);
+//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 sas_phy_linkspeed_attr(negotiated_linkrate);
 sas_phy_linkspeed_attr(minimum_linkrate_hw);
 sas_phy_linkspeed_attr(minimum_linkrate);
@@ -590,6 +592,38 @@ struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 }
 EXPORT_SYMBOL(sas_port_alloc);
 
+/** sas_port_alloc_num - allocate and initialize a SAS port structure
+ *
+ * @parent:     parent device
+ *
+ * Allocates a SAS port structure and a number to go with it.  This
+ * interface is really for adapters where the port number has no
+ * meansing, so the sas class should manage them.  It will be added to
+ * the device tree below the device specified by @parent which must be
+ * either a Scsi_Host or a sas_expander_device.
+ *
+ * Returns %NULL on error
+ */
+struct sas_port *sas_port_alloc_num(struct device *parent)
+{
+        int index;
+        struct Scsi_Host *shost = dev_to_shost(parent);
+        struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
+
+        /* FIXME: use idr for this eventually */
+        mutex_lock(&sas_host->lock);
+        if (scsi_is_sas_expander_device(parent)) {
+                struct sas_rphy *rphy = dev_to_rphy(parent);
+                struct sas_expander_device *exp = rphy_to_expander_device(rphy);
+
+                index = exp->next_port_id++;
+        } else
+                index = sas_host->next_port_id++;
+        mutex_unlock(&sas_host->lock);
+        return sas_port_alloc(parent, index);
+}
+EXPORT_SYMBOL(sas_port_alloc_num);
+
 /**
  * sas_port_add - add a SAS port to the device hierarchy
  *
@@ -658,6 +692,13 @@ void sas_port_delete(struct sas_port *port)
         }
         mutex_unlock(&port->phy_list_mutex);
 
+        if (port->is_backlink) {
+                struct device *parent = port->dev.parent;
+
+                sysfs_remove_link(&port->dev.kobj, parent->bus_id);
+                port->is_backlink = 0;
+        }
+
         transport_remove_device(dev);
         device_del(dev);
         transport_destroy_device(dev);
@@ -733,6 +774,19 @@ void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
 }
 EXPORT_SYMBOL(sas_port_delete_phy);
 
+void sas_port_mark_backlink(struct sas_port *port)
+{
+        struct device *parent = port->dev.parent->parent->parent;
+
+        if (port->is_backlink)
+                return;
+        port->is_backlink = 1;
+        sysfs_create_link(&port->dev.kobj, &parent->kobj,
+                          parent->bus_id);
+
+}
+EXPORT_SYMBOL(sas_port_mark_backlink);
+
 /*
  * SAS remote PHY attributes.
  */
@@ -1140,7 +1194,7 @@ int sas_rphy_add(struct sas_rphy *rphy)
 
         if (identify->device_type == SAS_END_DEVICE &&
             rphy->scsi_target_id != -1) {
-                scsi_scan_target(&rphy->dev, parent->port_identifier,
+                scsi_scan_target(&rphy->dev, 0,
                                 rphy->scsi_target_id, ~0, 0);
         }
 
@@ -1242,15 +1296,13 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel,
 
         mutex_lock(&sas_host->lock);
         list_for_each_entry(rphy, &sas_host->rphy_list, list) {
-                struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
-
                 if (rphy->identify.device_type != SAS_END_DEVICE ||
                     rphy->scsi_target_id == -1)
                         continue;
 
-                if ((channel == SCAN_WILD_CARD || channel == parent->port_identifier) &&
+                if ((channel == SCAN_WILD_CARD || channel == 0) &&
                     (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
-                        scsi_scan_target(&rphy->dev, parent->port_identifier,
+                        scsi_scan_target(&rphy->dev, 0,
                                          rphy->scsi_target_id, lun, 1);
                 }
         }