[PATCH] powerpc/PCI hotplug: de-convolute rpaphp_unconfig_pci_adap

Remove general baroqueness.  The function rpaphp_unconfig_pci_adapter()
is really just three lines of code, once all the dbg printks are removed.
And its called in only one place. So replace the call by the thre lines.
Also, provide proper semaphore locking in the affected function
disable_slot()
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/pci/hotplug/rpadlpar_core.c

@@ -380,7 +380,11 @@ int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
 			return -EIO;
 		}
 	} else {
-		rpaphp_unconfig_pci_adapter(bus);
+		struct pci_dev *dev, *tmp;
+		list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
+			eeh_remove_bus_device(dev);
+			pci_remove_bus_device(dev);
+		}
 	}
 
 	if (unmap_bus_range(bus)) {

drivers/pci/hotplug/rpaphp.h

@@ -92,8 +92,6 @@ extern int rpaphp_enable_pci_slot(struct slot *slot);
 extern int register_pci_slot(struct slot *slot);
 extern int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value);
 
-extern int rpaphp_unconfig_pci_adapter(struct pci_bus *bus);
-
 /* rpaphp_core.c */
 extern int rpaphp_add_slot(struct device_node *dn);
 extern int rpaphp_remove_slot(struct slot *slot);

drivers/pci/hotplug/rpaphp_core.c

@@ -412,27 +412,31 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
 	return retval;
 }
 
-static int disable_slot(struct hotplug_slot *hotplug_slot)
+static int __disable_slot(struct slot *slot)
 {
-	int retval = -EINVAL;
-	struct slot *slot = (struct slot *)hotplug_slot->private;
+	struct pci_dev *dev, *tmp;
 
-	dbg("%s - Entry: slot[%s]\n", __FUNCTION__, slot->name);
+	if (slot->state == NOT_CONFIGURED)
+		return -EINVAL;
 
-	if (slot->state == NOT_CONFIGURED) {
-		dbg("%s: %s is already disabled\n", __FUNCTION__, slot->name);
-		goto exit;
+	list_for_each_entry_safe(dev, tmp, &slot->bus->devices, bus_list) {
+		eeh_remove_bus_device(dev);
+		pci_remove_bus_device(dev);
 	}
 
-	dbg("DISABLING SLOT %s\n", slot->name);
+	slot->state = NOT_CONFIGURED;
+	return 0;
+}
+
+static int disable_slot(struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+	int retval;
+
 	down(&rpaphp_sem);
-	retval = rpaphp_unconfig_pci_adapter(slot->bus);
+	retval = __disable_slot (slot);
 	up(&rpaphp_sem);
-	slot->state = NOT_CONFIGURED;
-	info("%s: devices in slot[%s] unconfigured.\n", __FUNCTION__,
-	     slot->name);
-exit:
-	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+
 	return retval;
 }
 

drivers/pci/hotplug/rpaphp_pci.c

@@ -116,18 +116,6 @@ static void print_slot_pci_funcs(struct pci_bus *bus)
 	return;
 }
 
-int rpaphp_unconfig_pci_adapter(struct pci_bus *bus)
-{
-	struct pci_dev *dev, *tmp;
-
-	list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
-		eeh_remove_bus_device(dev);
-		pci_remove_bus_device(dev);
-	}
-	return 0;
-}
-EXPORT_SYMBOL_GPL(rpaphp_unconfig_pci_adapter);
-
 static int setup_pci_hotplug_slot_info(struct slot *slot)
 {
 	struct hotplug_slot_info *hotplug_slot_info = slot->hotplug_slot->info;