PCI Hotplug core: add 'name' param pci_hp_register interface

Update pci_hp_register() to take a const char *name parameter.

The motivation for this is to clean up the individual hotplug
drivers so that each one does not have to manage its own name.
The PCI core should be the place where we manage the name.

We update the interface and all callsites first, in a
"no functional change" manner, and clean up the drivers later.

Cc: kristen.c.accardi@intel.com
Acked-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/acpiphp_core.c

@@ -340,7 +340,8 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
 
 	retval = pci_hp_register(slot->hotplug_slot,
 					acpiphp_slot->bridge->pci_bus,
-					acpiphp_slot->device);
+					acpiphp_slot->device,
+					slot->name);
 	if (retval == -EBUSY)
 		goto error_hpslot;
 	if (retval) {

drivers/pci/hotplug/cpci_hotplug_core.c

@@ -285,7 +285,8 @@ cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last)
 		info->attention_status = cpci_get_attention_status(slot);
 
 		dbg("registering slot %s", slot->hotplug_slot->name);
-		status = pci_hp_register(slot->hotplug_slot, bus, i);
+		status = pci_hp_register(slot->hotplug_slot, bus, i,
+					 slot->hotplug_slot->name);
 		if (status) {
 			err("pci_hp_register failed with error %d", status);
 			goto error_name;

drivers/pci/hotplug/cpqphp_core.c

@@ -436,7 +436,8 @@ static int ctrl_slot_setup(struct controller *ctrl,
 				slot_number);
 		result = pci_hp_register(hotplug_slot,
 					 ctrl->pci_dev->subordinate,
-					 slot->device);
+					 slot->device,
+					 hotplug_slot->name);
 		if (result) {
 			err("pci_hp_register failed with error %d\n", result);
 			goto error_name;

drivers/pci/hotplug/fakephp.c

@@ -126,7 +126,8 @@ static int add_slot(struct pci_dev *dev)
 	slot->release = &dummy_release;
 	slot->private = dslot;
 
-	retval = pci_hp_register(slot, dev->bus, PCI_SLOT(dev->devfn));
+	retval = pci_hp_register(slot, dev->bus, PCI_SLOT(dev->devfn),
+				 slot->name);
 	if (retval) {
 		err("pci_hp_register failed with error %d\n", retval);
 		goto error_dslot;

drivers/pci/hotplug/ibmphp_ebda.c

@@ -966,7 +966,8 @@ static int __init ebda_rsrc_controller (void)
 	list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
 		snprintf (tmp_slot->hotplug_slot->name, 30, "%s", create_file_name (tmp_slot));
 		pci_hp_register(tmp_slot->hotplug_slot,
-			pci_find_bus(0, tmp_slot->bus), tmp_slot->device);
+			pci_find_bus(0, tmp_slot->bus), tmp_slot->device,
+			tmp_slot->hotplug_slot->name);
 	}
 
 	print_ebda_hpc ();

drivers/pci/hotplug/pci_hotplug_core.c

@@ -547,13 +547,15 @@ out:
  * @bus: bus this slot is on
  * @slot: pointer to the &struct hotplug_slot to register
  * @slot_nr: slot number
+ * @name: name registered with kobject core
  *
  * Registers a hotplug slot with the pci hotplug subsystem, which will allow
  * userspace interaction to the slot.
  *
  * Returns 0 if successful, anything else for an error.
  */
-int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
+int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr,
+			const char *name)
 {
 	int result;
 	struct pci_slot *pci_slot;
@@ -569,7 +571,7 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
 	}
 
 	/* Check if we have already registered a slot with the same name. */
-	if (get_slot_from_name(slot->name))
+	if (get_slot_from_name(name))
 		return -EEXIST;
 
 	/*
@@ -577,7 +579,7 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
 	 * driver and call it here again. If we've already created the
 	 * pci_slot, the interface will simply bump the refcount.
 	 */
-	pci_slot = pci_create_slot(bus, slot_nr, slot->name);
+	pci_slot = pci_create_slot(bus, slot_nr, name);
 	if (IS_ERR(pci_slot))
 		return PTR_ERR(pci_slot);
 
@@ -593,8 +595,8 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
 	/*
 	 * Allow pcihp drivers to override the ACPI_PCI_SLOT name.
 	 */
-	if (strcmp(kobject_name(&pci_slot->kobj), slot->name)) {
-		result = kobject_rename(&pci_slot->kobj, slot->name);
+	if (strcmp(kobject_name(&pci_slot->kobj), name)) {
+		result = kobject_rename(&pci_slot->kobj, name);
 		if (result) {
 			pci_destroy_slot(pci_slot);
 			return result;
@@ -607,8 +609,7 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
 
 	result = fs_add_slot(pci_slot);
 	kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
-	dbg("Added slot %s to the list\n", slot->name);
-
+	dbg("Added slot %s to the list\n", name);
 
 	return result;
 }

drivers/pci/hotplug/pciehp_core.c

@@ -226,7 +226,8 @@ static int init_slots(struct controller *ctrl)
 duplicate_name:
 		retval = pci_hp_register(hotplug_slot,
 					 ctrl->pci_dev->subordinate,
-					 slot->device);
+					 slot->device,
+					 slot->name);
 		if (retval) {
 			/*
 			 * If slot N already exists, we'll try to create

drivers/pci/hotplug/rpaphp_slot.c

@@ -137,7 +137,7 @@ int rpaphp_register_slot(struct slot *slot)
 		slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
 	else
 		slotno = -1;
-	retval = pci_hp_register(php_slot, slot->bus, slotno);
+	retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name);
 	if (retval) {
 		err("pci_hp_register failed with error %d\n", retval);
 		return retval;

drivers/pci/hotplug/sgi_hotplug.c

@@ -653,7 +653,8 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
 		bss_hotplug_slot->ops = &sn_hotplug_slot_ops;
 		bss_hotplug_slot->release = &sn_release_slot;
 
-		rc = pci_hp_register(bss_hotplug_slot, pci_bus, device);
+		rc = pci_hp_register(bss_hotplug_slot, pci_bus, device,
+				     bss_hotplug_slot->name);
 		if (rc)
 			goto register_err;
 

drivers/pci/hotplug/shpchp_core.c

@@ -146,7 +146,8 @@ static int init_slots(struct controller *ctrl)
 		    slot->hp_slot, slot->number, ctrl->slot_device_offset);
 duplicate_name:
 		retval = pci_hp_register(slot->hotplug_slot,
-				ctrl->pci_dev->subordinate, slot->device);
+				ctrl->pci_dev->subordinate, slot->device,
+				hotplug_slot->name);
 		if (retval) {
 			/*
 			 * If slot N already exists, we'll try to create

include/linux/pci_hotplug.h

@@ -165,7 +165,8 @@ struct hotplug_slot {
 };
 #define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj)
 
-extern int pci_hp_register(struct hotplug_slot *, struct pci_bus *, int nr);
+extern int pci_hp_register(struct hotplug_slot *, struct pci_bus *, int nr,
+			   const char *name);
 extern int pci_hp_deregister(struct hotplug_slot *slot);
 extern int __must_check pci_hp_change_slot_info	(struct hotplug_slot *slot,
 						 struct hotplug_slot_info *info);