+/*
+ * mptsas_delete_expander_phys
+ *
+ *
+ * This will traverse topology, and remove expanders
+ * that are no longer present
+ */
+static void
+mptsas_delete_expander_phys(MPT_ADAPTER *ioc)
+{
+ struct mptsas_portinfo buffer;
+ struct mptsas_portinfo *port_info, *n, *parent;
+ int i;
+
+ mutex_lock(&ioc->sas_topology_mutex);
+ list_for_each_entry_safe(port_info, n, &ioc->sas_topology, list) {
+
+ if (port_info->phy_info &&
+ (!(port_info->phy_info[0].identify.device_info &
+ MPI_SAS_DEVICE_INFO_SMP_TARGET)))
+ continue;
+
+ if (mptsas_sas_expander_pg0(ioc, &buffer,
+ (MPI_SAS_EXPAND_PGAD_FORM_HANDLE <<
+ MPI_SAS_EXPAND_PGAD_FORM_SHIFT), port_info->handle)) {
+
+ /*
+ * Obtain the port_info instance to the parent port
+ */
+ parent = mptsas_find_portinfo_by_handle(ioc,
+ port_info->phy_info[0].identify.handle_parent);
+
+ if (!parent)
+ goto next_port;
+
+ /*
+ * Delete rphys in the parent that point
+ * to this expander. The transport layer will
+ * cleanup all the children.
+ */
+ for (i = 0; i < parent->num_phys; i++) {
+ if ((!parent->phy_info[i].rphy) ||
+ (parent->phy_info[i].attached.sas_address !=
+ port_info->phy_info[i].identify.sas_address))
+ continue;
+ sas_rphy_delete(parent->phy_info[i].rphy);
+ memset(&parent->phy_info[i].attached, 0,
+ sizeof(struct mptsas_devinfo));
+ parent->phy_info[i].rphy = NULL;
+ parent->phy_info[i].starget = NULL;
+ }
+ next_port:
+ list_del(&port_info->list);
+ if (port_info->phy_info)
+ kfree(port_info->phy_info);
+ kfree(port_info);
+ }
+ /*
+ * Free this memory allocated from inside
+ * mptsas_sas_expander_pg0
+ */
+ if (buffer.phy_info)
+ kfree(buffer.phy_info);
+ }
+ mutex_unlock(&ioc->sas_topology_mutex);
+}
+
+/*
+ * Start of day discovery
+ */