[PATCH] PCI Hotplug: rpaphp: Export slot enable

This patch exports rpaphp_config_pci_adapter() for use by the rpadlpar
module.  It also changes this function by removing any dependencies on
struct slot.  The patch also changes the RPA DLPAR-add path to enable
newly-added slots in a separate step from that which registers them as
hotplug slots.

Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/hotplug/rpadlpar_core.c

@@ -209,9 +209,10 @@ static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
 	return dev;
 }
 
-static inline int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
+static int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
 {
 	struct pci_dev *dev;
+	int rc;
 
 	/* Add pci bus */
 	dev = dlpar_pci_add_bus(dn);
@@ -221,6 +222,15 @@ static inline int dlpar_add_pci_slot(char *drc_name, struct device_node *dn)
 		return -EIO;
 	}
 
+	if (dn->child) {
+		rc = rpaphp_config_pci_adapter(dev->subordinate);
+		if (rc < 0) {
+			printk(KERN_ERR "%s: unable to enable slot %s\n",
+				__FUNCTION__, drc_name);
+			return -EIO;
+		}
+	}
+
 	/* Add hotplug slot */
 	if (rpaphp_add_slot(dn)) {
 		printk(KERN_ERR "%s: unable to add hotplug slot %s\n",

drivers/pci/hotplug/rpaphp.h

@@ -98,6 +98,7 @@ extern int rpaphp_enable_pci_slot(struct slot *slot);
 extern int register_pci_slot(struct slot *slot);
 extern int rpaphp_unconfig_pci_adapter(struct slot *slot);
 extern int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value);
+extern int rpaphp_config_pci_adapter(struct pci_bus *bus);
 
 /* rpaphp_core.c */
 extern int rpaphp_add_slot(struct device_node *dn);

drivers/pci/hotplug/rpaphp_pci.c

@@ -219,14 +219,15 @@ static int rpaphp_pci_config_bridge(struct pci_dev *dev)
  given slot->dn and return the the first pci_dev.
  *****************************************************************************/
 static struct pci_dev *
-rpaphp_pci_config_slot(struct device_node *dn, struct pci_bus *bus)
+rpaphp_pci_config_slot(struct pci_bus *bus)
 {
+	struct device_node *dn = pci_bus_to_OF_node(bus);
 	struct pci_dev *dev = NULL;
 	int slotno;
 	int num;
 
 	dbg("Enter %s: dn=%s bus=%s\n", __FUNCTION__, dn->full_name, bus->name);
-	if (!dn->child)
+	if (!dn || !dn->child)
 		return NULL;
 
 	slotno = PCI_SLOT(dn->child->devfn);
@@ -260,35 +261,44 @@ static void enable_eeh(struct device_node *dn)
 
 }
 
-static void print_slot_pci_funcs(struct slot *slot)
+static void print_slot_pci_funcs(struct pci_bus *bus)
 {
+	struct device_node *dn;
 	struct pci_dev *dev;
 
-	dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, slot->name);
-	list_for_each_entry (dev, slot->pci_devs, bus_list)
+	dn = pci_bus_to_OF_node(bus);
+	if (!dn)
+		return;
+
+	dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, dn->full_name);
+	list_for_each_entry (dev, &bus->devices, bus_list)
 		dbg("\t%s\n", pci_name(dev));
 	return;
 }
 
-static int rpaphp_config_pci_adapter(struct slot *slot)
+int rpaphp_config_pci_adapter(struct pci_bus *bus)
 {
+	struct device_node *dn = pci_bus_to_OF_node(bus);
 	struct pci_dev *dev;
 	int rc = -ENODEV;
 
-	dbg("Entry %s: slot[%s]\n", __FUNCTION__, slot->name);
+	dbg("Entry %s: slot[%s]\n", __FUNCTION__, dn->full_name);
+	if (!dn)
+		goto exit;
 
-	enable_eeh(slot->dn);
-	dev = rpaphp_pci_config_slot(slot->dn, slot->bus);
+	enable_eeh(dn);
+	dev = rpaphp_pci_config_slot(bus);
 	if (!dev) {
 		err("%s: can't find any devices.\n", __FUNCTION__);
 		goto exit;
 	}
-	print_slot_pci_funcs(slot);
+	print_slot_pci_funcs(bus);
 	rc = 0;
 exit:
 	dbg("Exit %s:  rc=%d\n", __FUNCTION__, rc);
 	return rc;
 }
+EXPORT_SYMBOL_GPL(rpaphp_config_pci_adapter);
 
 static void rpaphp_eeh_remove_bus_device(struct pci_dev *dev)
 {
@@ -384,7 +394,7 @@ static int setup_pci_slot(struct slot *slot)
 		if (slot->hotplug_slot->info->adapter_status == NOT_CONFIGURED) {
 			dbg("%s CONFIGURING pci adapter in slot[%s]\n",  
 				__FUNCTION__, slot->name);
-			if (rpaphp_config_pci_adapter(slot)) {
+			if (rpaphp_config_pci_adapter(slot->bus)) {
 				err("%s: CONFIG pci adapter failed\n", __FUNCTION__);
 				goto exit_rc;		
 			}
@@ -394,7 +404,7 @@ static int setup_pci_slot(struct slot *slot)
 				__FUNCTION__, slot->name);
 			goto exit_rc;
 		}
-		print_slot_pci_funcs(slot);
+		print_slot_pci_funcs(slot->bus);
 		if (!list_empty(slot->pci_devs)) {
 			slot->state = CONFIGURED;
 		} else {
@@ -437,7 +447,7 @@ int rpaphp_enable_pci_slot(struct slot *slot)
 	/* if slot is not empty, enable the adapter */
 	if (state == PRESENT) {
 		dbg("%s : slot[%s] is occupied.\n", __FUNCTION__, slot->name);
-		retval = rpaphp_config_pci_adapter(slot);
+		retval = rpaphp_config_pci_adapter(slot->bus);
 		if (!retval) {
 			slot->state = CONFIGURED;
 			dbg("%s: PCI devices in slot[%s] has been configured\n",