Merge branch 'linux-2.6'

17 files changed, 514 insertions, 735 deletions

diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
index be92695..63d6275 100644
--- a/drivers/pci/hotplug/Kconfig
+++ b/drivers/pci/hotplug/Kconfig
@@ -2,9 +2,7 @@
 # PCI Hotplug support
 #
 
-menu "PCI Hotplug Support"
-
-config HOTPLUG_PCI
+menuconfig HOTPLUG_PCI
 	tristate "Support for PCI Hotplug (EXPERIMENTAL)"
 	depends on PCI && EXPERIMENTAL && HOTPLUG
 	---help---
@@ -17,9 +15,10 @@ config HOTPLUG_PCI
 
 	  When in doubt, say N.
 
+if HOTPLUG_PCI
+
 config HOTPLUG_PCI_FAKE
 	tristate "Fake PCI Hotplug driver"
-	depends on HOTPLUG_PCI
 	help
 	  Say Y here if you want to use the fake PCI hotplug driver. It can
 	  be used to simulate PCI hotplug events if even if your system is
@@ -42,7 +41,7 @@ config HOTPLUG_PCI_FAKE
 
 config HOTPLUG_PCI_COMPAQ
 	tristate "Compaq PCI Hotplug driver"
-	depends on HOTPLUG_PCI && X86 && PCI_BIOS
+	depends on X86 && PCI_BIOS
 	help
 	  Say Y here if you have a motherboard with a Compaq PCI Hotplug
 	  controller.
@@ -64,7 +63,7 @@ config HOTPLUG_PCI_COMPAQ_NVRAM
 
 config HOTPLUG_PCI_IBM
 	tristate "IBM PCI Hotplug driver"
-	depends on HOTPLUG_PCI && X86_IO_APIC && X86 && PCI_BIOS
+	depends on X86_IO_APIC && X86 && PCI_BIOS
 	help
 	  Say Y here if you have a motherboard with a IBM PCI Hotplug
 	  controller.
@@ -76,7 +75,6 @@ config HOTPLUG_PCI_IBM
 
 config HOTPLUG_PCI_ACPI
 	tristate "ACPI PCI Hotplug driver"
-	depends on HOTPLUG_PCI
 	depends on (!ACPI_DOCK && ACPI) || (ACPI_DOCK)
 	help
 	  Say Y here if you have a system that supports PCI Hotplug using
@@ -101,7 +99,6 @@ config HOTPLUG_PCI_ACPI_IBM
 
 config HOTPLUG_PCI_CPCI
 	bool "CompactPCI Hotplug driver"
-	depends on HOTPLUG_PCI
 	help
 	  Say Y here if you have a CompactPCI system card with CompactPCI
 	  hotswap support per the PICMG 2.1 specification.
@@ -110,7 +107,7 @@ config HOTPLUG_PCI_CPCI
 
 config HOTPLUG_PCI_CPCI_ZT5550
 	tristate "Ziatech ZT5550 CompactPCI Hotplug driver"
-	depends on HOTPLUG_PCI && HOTPLUG_PCI_CPCI && X86
+	depends on HOTPLUG_PCI_CPCI && X86
 	help
 	  Say Y here if you have an Performance Technologies (formerly Intel,
           formerly just Ziatech) Ziatech ZT5550 CompactPCI system card.
@@ -122,7 +119,7 @@ config HOTPLUG_PCI_CPCI_ZT5550
 
 config HOTPLUG_PCI_CPCI_GENERIC
 	tristate "Generic port I/O CompactPCI Hotplug driver"
-	depends on HOTPLUG_PCI && HOTPLUG_PCI_CPCI && X86
+	depends on HOTPLUG_PCI_CPCI && X86
 	help
 	  Say Y here if you have a CompactPCI system card that exposes the #ENUM
 	  hotswap signal as a bit in a system register that can be read through
@@ -135,7 +132,6 @@ config HOTPLUG_PCI_CPCI_GENERIC
 
 config HOTPLUG_PCI_SHPC
 	tristate "SHPC PCI Hotplug driver"
-	depends on HOTPLUG_PCI
 	help
 	  Say Y here if you have a motherboard with a SHPC PCI Hotplug
 	  controller.
@@ -147,7 +143,7 @@ config HOTPLUG_PCI_SHPC
 
 config HOTPLUG_PCI_RPA
 	tristate "RPA PCI Hotplug driver"
-	depends on HOTPLUG_PCI && PPC_PSERIES && PPC64 && !HOTPLUG_PCI_FAKE
+	depends on PPC_PSERIES && PPC64 && !HOTPLUG_PCI_FAKE
 	help
 	  Say Y here if you have a RPA system that supports PCI Hotplug.
 
@@ -170,12 +166,11 @@ config HOTPLUG_PCI_RPA_DLPAR
 
 config HOTPLUG_PCI_SGI
 	tristate "SGI PCI Hotplug Support"
-	depends on HOTPLUG_PCI && (IA64_SGI_SN2 || IA64_GENERIC)
+	depends on IA64_SGI_SN2 || IA64_GENERIC
 	help
 	  Say Y here if you want to use the SGI Altix Hotplug
 	  Driver for PCI devices.
 
 	  When in doubt, say N.
 
-endmenu
-
+endif # HOTPLUG_PCI
diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index 7f03881..e7322c2 100644
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -424,7 +424,7 @@ static int __init ibm_acpiphp_init(void)
 	int retval = 0;
 	acpi_status status;
 	struct acpi_device *device;
-	struct kobject *sysdir = &pci_hotplug_slots_subsys.kset.kobj;
+	struct kobject *sysdir = &pci_hotplug_slots_subsys.kobj;
 
 	dbg("%s\n", __FUNCTION__);
 
@@ -471,7 +471,7 @@ init_return:
 static void __exit ibm_acpiphp_exit(void)
 {
 	acpi_status status;
-	struct kobject *sysdir = &pci_hotplug_slots_subsys.kset.kobj;
+	struct kobject *sysdir = &pci_hotplug_slots_subsys.kobj;
 
 	dbg("%s\n", __FUNCTION__);
 
diff --git a/drivers/pci/hotplug/cpcihp_zt5550.c b/drivers/pci/hotplug/cpcihp_zt5550.c
index 1c12e91..41f6a8d 100644
--- a/drivers/pci/hotplug/cpcihp_zt5550.c
+++ b/drivers/pci/hotplug/cpcihp_zt5550.c
@@ -296,13 +296,17 @@ static struct pci_driver zt5550_hc_driver = {
 static int __init zt5550_init(void)
 {
 	struct resource* r;
+	int rc;
 
 	info(DRIVER_DESC " version: " DRIVER_VERSION);
 	r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
 	if(!r)
 		return -EBUSY;
 
-	return pci_register_driver(&zt5550_hc_driver);
+	rc = pci_register_driver(&zt5550_hc_driver);
+	if(rc < 0)
+		release_region(ENUM_PORT, 1);
+	return rc;
 }
 
 static void __exit
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
index e27907c..027f686 100644
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -238,7 +238,7 @@ static void pci_rescan_bus(const struct pci_bus *bus)
 {
 	unsigned int devfn;
 	struct pci_dev *dev;
-	dev = kzalloc(sizeof(struct pci_dev), GFP_KERNEL);
+	dev = alloc_pci_dev();
 	if (!dev)
 		return;
 
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index f5d632e..63f3bd1 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -62,7 +62,7 @@ static int debug;
 
 static LIST_HEAD(pci_hotplug_slot_list);
 
-struct subsystem pci_hotplug_slots_subsys;
+struct kset pci_hotplug_slots_subsys;
 
 static ssize_t hotplug_slot_attr_show(struct kobject *kobj,
 		struct attribute *attr, char *buf)
@@ -764,7 +764,7 @@ static int __init pci_hotplug_init (void)
 {
 	int result;
 
-	kset_set_kset_s(&pci_hotplug_slots_subsys, pci_bus_type.subsys);
+	kobj_set_kset_s(&pci_hotplug_slots_subsys, pci_bus_type.subsys);
 	result = subsystem_register(&pci_hotplug_slots_subsys);
 	if (result) {
 		err("Register subsys with error %d\n", result);
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index d19fcae..ccc5762 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -43,6 +43,7 @@ extern int pciehp_poll_mode;
 extern int pciehp_poll_time;
 extern int pciehp_debug;
 extern int pciehp_force;
+extern struct workqueue_struct *pciehp_wq;
 
 #define dbg(format, arg...)						\
 	do {								\
@@ -70,14 +71,16 @@ struct slot {
 	struct list_head	slot_list;
 	char name[SLOT_NAME_SIZE];
 	unsigned long last_emi_toggle;
+	struct delayed_work work;	/* work for button event */
+	struct mutex lock;
 };
 
 struct event_info {
 	u32 event_type;
-	u8 hp_slot;
+	struct slot *p_slot;
+	struct work_struct work;
 };
 
-#define MAX_EVENTS		10
 struct controller {
 	struct controller *next;
 	struct mutex crit_sect;		/* critical section mutex */
@@ -86,11 +89,9 @@ struct controller {
 	int slot_num_inc;		/* 1 or -1 */
 	struct pci_dev *pci_dev;
 	struct list_head slot_list;
-	struct event_info event_queue[MAX_EVENTS];
 	struct slot *slot;
 	struct hpc_ops *hpc_ops;
 	wait_queue_head_t queue;	/* sleep & wake process */
-	u8 next_event;
 	u8 bus;
 	u8 device;
 	u8 function;
@@ -149,21 +150,17 @@ struct controller {
 #define HP_SUPR_RM(cap)		(cap & HP_SUPR_RM_SUP)
 #define EMI(cap)		(cap & EMI_PRSN)
 
-extern int pciehp_event_start_thread(void);
-extern void pciehp_event_stop_thread(void);
-extern int pciehp_enable_slot(struct slot *slot);
-extern int pciehp_disable_slot(struct slot *slot);
+extern int pciehp_sysfs_enable_slot(struct slot *slot);
+extern int pciehp_sysfs_disable_slot(struct slot *slot);
 extern u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
 extern u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
 extern u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
 extern u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
 extern int pciehp_configure_device(struct slot *p_slot);
 extern int pciehp_unconfigure_device(struct slot *p_slot);
+extern void pciehp_queue_pushbutton_work(struct work_struct *work);
 int pcie_init(struct controller *ctrl, struct pcie_device *dev);
 
-/* Global variables */
-extern struct controller *pciehp_ctrl_list;
-
 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
 {
 	struct slot *slot;
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index a92eda6..e5d3f0b 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -41,7 +41,7 @@ int pciehp_debug;
 int pciehp_poll_mode;
 int pciehp_poll_time;
 int pciehp_force;
-struct controller *pciehp_ctrl_list;
+struct workqueue_struct *pciehp_wq;
 
 #define DRIVER_VERSION	"0.4"
 #define DRIVER_AUTHOR	"Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
@@ -62,7 +62,6 @@ MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing"
 
 #define PCIE_MODULE_NAME "pciehp"
 
-static int pcie_start_thread (void);
 static int set_attention_status (struct hotplug_slot *slot, u8 value);
 static int enable_slot		(struct hotplug_slot *slot);
 static int disable_slot		(struct hotplug_slot *slot);
@@ -229,6 +228,8 @@ static int init_slots(struct controller *ctrl)
 		slot->device = ctrl->slot_device_offset + i;
 		slot->hpc_ops = ctrl->hpc_ops;
 		slot->number = ctrl->first_slot;
+		mutex_init(&slot->lock);
+		INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work);
 
 		/* register this slot with the hotplug pci core */
 		hotplug_slot->private = slot;
@@ -286,6 +287,9 @@ static void cleanup_slots(struct controller *ctrl)
 		if (EMI(ctrl->ctrlcap))
 			sysfs_remove_file(&slot->hotplug_slot->kobj,
 				&hotplug_slot_attr_lock.attr);
+		cancel_delayed_work(&slot->work);
+		flush_scheduled_work();
+		flush_workqueue(pciehp_wq);
 		pci_hp_deregister(slot->hotplug_slot);
 	}
 }
@@ -314,7 +318,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
 
 	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 
-	return pciehp_enable_slot(slot);
+	return pciehp_sysfs_enable_slot(slot);
 }
 
 
@@ -324,7 +328,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
 
 	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 
-	return pciehp_disable_slot(slot);
+	return pciehp_sysfs_disable_slot(slot);
 }
 
 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -466,17 +470,6 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_
 
 	t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
 
-	/*	Finish setting up the hot plug ctrl device */
-	ctrl->next_event = 0;
-
-	if (!pciehp_ctrl_list) {
-		pciehp_ctrl_list = ctrl;
-		ctrl->next = NULL;
-	} else {
-		ctrl->next = pciehp_ctrl_list;
-		pciehp_ctrl_list = ctrl;
-	}
-
 	t_slot->hpc_ops->get_adapter_status(t_slot, &value); /* Check if slot is occupied */
 	if ((POWER_CTRL(ctrl->ctrlcap)) && !value) {
 		rc = t_slot->hpc_ops->power_off_slot(t_slot); /* Power off slot if not occupied*/
@@ -496,48 +489,14 @@ err_out_none:
 	return -ENODEV;
 }
 
-
-static int pcie_start_thread(void)
+static void pciehp_remove (struct pcie_device *dev)
 {
-	int retval = 0;
-	
-	dbg("Initialize + Start the notification/polling mechanism \n");
-
-	retval = pciehp_event_start_thread();
-	if (retval) {
-		dbg("pciehp_event_start_thread() failed\n");
-		return retval;
-	}
-
-	return retval;
-}
-
-static void __exit unload_pciehpd(void)
-{
-	struct controller *ctrl;
-	struct controller *tctrl;
-
-	ctrl = pciehp_ctrl_list;
-
-	while (ctrl) {
-		cleanup_slots(ctrl);
+	struct pci_dev *pdev = dev->port;
+	struct controller *ctrl = pci_get_drvdata(pdev);
 
-		ctrl->hpc_ops->release_ctlr(ctrl);
-
-		tctrl = ctrl;
-		ctrl = ctrl->next;
-
-		kfree(tctrl);
-	}
-
-	/* Stop the notification mechanism */
-	pciehp_event_stop_thread();
-
-}
-
-static void pciehp_remove (struct pcie_device *device)
-{
-	/* XXX - Needs to be adapted to device driver model */
+	cleanup_slots(ctrl);
+	ctrl->hpc_ops->release_ctlr(ctrl);
+	kfree(ctrl);
 }
 
 #ifdef CONFIG_PM
@@ -585,31 +544,18 @@ static int __init pcied_init(void)
 	pciehp_poll_mode = 1;
 #endif
 
-	retval = pcie_start_thread();
-	if (retval)
-		goto error_hpc_init;
-
 	retval = pcie_port_service_register(&hpdriver_portdrv);
  	dbg("pcie_port_service_register = %d\n", retval);
   	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
  	if (retval)
 		dbg("%s: Failure to register service\n", __FUNCTION__);
-
-error_hpc_init:
-	if (retval) {
-		pciehp_event_stop_thread();
-	};
-
 	return retval;
 }
 
 static void __exit pcied_cleanup(void)
 {
 	dbg("unload_pciehpd()\n");
-	unload_pciehpd();
-
 	pcie_port_service_unregister(&hpdriver_portdrv);
-
 	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
 }
 
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 4283ef5..7f22caa 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -32,92 +32,61 @@
 #include <linux/types.h>
 #include <linux/smp_lock.h>
 #include <linux/pci.h>
+#include <linux/workqueue.h>
 #include "../pci.h"
 #include "pciehp.h"
 
-static void interrupt_event_handler(struct controller *ctrl);
+static void interrupt_event_handler(struct work_struct *work);
+static int pciehp_enable_slot(struct slot *p_slot);
+static int pciehp_disable_slot(struct slot *p_slot);
 
-static struct semaphore event_semaphore;	/* mutex for process loop (up if something to process) */
-static struct semaphore event_exit;		/* guard ensure thread has exited before calling it quits */
-static int event_finished;
-static unsigned long pushbutton_pending;	/* = 0 */
-static unsigned long surprise_rm_pending;	/* = 0 */
-
-static inline char *slot_name(struct slot *p_slot)
+static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
 {
-	return p_slot->hotplug_slot->name;
+	struct event_info *info;
+
+	info = kmalloc(sizeof(*info), GFP_ATOMIC);
+	if (!info)
+		return -ENOMEM;
+
+	info->event_type = event_type;
+	info->p_slot = p_slot;
+	INIT_WORK(&info->work, interrupt_event_handler);
+
+	schedule_work(&info->work);
+
+	return 0;
 }
 
 u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
 {
 	struct slot *p_slot;
-	u8 rc = 0;
-	u8 getstatus;
-	struct event_info *taskInfo;
+	u32 event_type;
 
 	/* Attention Button Change */
 	dbg("pciehp:  Attention button interrupt received.\n");
-	
-	/* This is the structure that tells the worker thread what to do */
-	taskInfo = &(ctrl->event_queue[ctrl->next_event]);
-	p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
-	p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
-	
-	ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
-	taskInfo->hp_slot = hp_slot;
 
-	rc++;
+	p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 
 	/*
 	 *  Button pressed - See if need to TAKE ACTION!!!
 	 */
-	info("Button pressed on Slot(%s)\n", slot_name(p_slot));
-	taskInfo->event_type = INT_BUTTON_PRESS;
-
-	if ((p_slot->state == BLINKINGON_STATE)
-	    || (p_slot->state == BLINKINGOFF_STATE)) {
-		/* Cancel if we are still blinking; this means that we press the
-		 * attention again before the 5 sec. limit expires to cancel hot-add
-		 * or hot-remove
-		 */
-		taskInfo->event_type = INT_BUTTON_CANCEL;
-		info("Button cancel on Slot(%s)\n", slot_name(p_slot));
-	} else if ((p_slot->state == POWERON_STATE)
-		   || (p_slot->state == POWEROFF_STATE)) {
-		/* Ignore if the slot is on power-on or power-off state; this 
-		 * means that the previous attention button action to hot-add or
-		 * hot-remove is undergoing
-		 */
-		taskInfo->event_type = INT_BUTTON_IGNORE;
-		info("Button ignore on Slot(%s)\n", slot_name(p_slot));
-	}
+	info("Button pressed on Slot(%s)\n", p_slot->name);
+	event_type = INT_BUTTON_PRESS;
 
-	if (rc)
-		up(&event_semaphore);	/* signal event thread that new event is posted */
+	queue_interrupt_event(p_slot, event_type);
 
 	return 0;
-
 }
 
 u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
 {
 	struct slot *p_slot;
-	u8 rc = 0;
 	u8 getstatus;
-	struct event_info *taskInfo;
+	u32 event_type;
 
 	/* Switch Change */
 	dbg("pciehp:  Switch interrupt received.\n");
 
-	/* This is the structure that tells the worker thread
-	 * what to do
-	 */
-	taskInfo = &(ctrl->event_queue[ctrl->next_event]);
-	ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
-	taskInfo->hp_slot = hp_slot;
-
-	rc++;
 	p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 	p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 
@@ -125,39 +94,30 @@ u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
 		/*
 		 * Switch opened
 		 */
-		info("Latch open on Slot(%s)\n", slot_name(p_slot));
-		taskInfo->event_type = INT_SWITCH_OPEN;
+		info("Latch open on Slot(%s)\n", p_slot->name);
+		event_type = INT_SWITCH_OPEN;
 	} else {
 		/*
 		 *  Switch closed
 		 */
-		info("Latch close on Slot(%s)\n", slot_name(p_slot));
-		taskInfo->event_type = INT_SWITCH_CLOSE;
+		info("Latch close on Slot(%s)\n", p_slot->name);
+		event_type = INT_SWITCH_CLOSE;
 	}
 
-	if (rc)
-		up(&event_semaphore);	/* signal event thread that new event is posted */
+	queue_interrupt_event(p_slot, event_type);
 
-	return rc;
+	return 1;
 }
 
 u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
 {
 	struct slot *p_slot;
-	u8 presence_save, rc = 0;
-	struct event_info *taskInfo;
+	u32 event_type;
+	u8 presence_save;
 
 	/* Presence Change */
 	dbg("pciehp:  Presence/Notify input change.\n");
 
-	/* This is the structure that tells the worker thread
-	 * what to do
-	 */
-	taskInfo = &(ctrl->event_queue[ctrl->next_event]);
-	ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
-	taskInfo->hp_slot = hp_slot;
-
-	rc++;
 	p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 
 	/* Switch is open, assume a presence change
@@ -168,59 +128,49 @@ u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
 		/*
 		 * Card Present
 		 */
-		info("Card present on Slot(%s)\n", slot_name(p_slot));
-		taskInfo->event_type = INT_PRESENCE_ON;
+		info("Card present on Slot(%s)\n", p_slot->name);
+		event_type = INT_PRESENCE_ON;
 	} else {
 		/*
 		 * Not Present
 		 */
-		info("Card not present on Slot(%s)\n", slot_name(p_slot));
-		taskInfo->event_type = INT_PRESENCE_OFF;
+		info("Card not present on Slot(%s)\n", p_slot->name);
+		event_type = INT_PRESENCE_OFF;
 	}
 
-	if (rc)
-		up(&event_semaphore);	/* signal event thread that new event is posted */
+	queue_interrupt_event(p_slot, event_type);
 
-	return rc;
+	return 1;
 }
 
 u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
 {
 	struct slot *p_slot;
-	u8 rc = 0;
-	struct event_info *taskInfo;
+	u32 event_type;
 
 	/* power fault */
 	dbg("pciehp:  Power fault interrupt received.\n");
 
-	/* this is the structure that tells the worker thread
-	 * what to do
-	 */
-	taskInfo = &(ctrl->event_queue[ctrl->next_event]);
-	ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
-	taskInfo->hp_slot = hp_slot;
-
-	rc++;
 	p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 
 	if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
 		/*
 		 * power fault Cleared
 		 */
-		info("Power fault cleared on Slot(%s)\n", slot_name(p_slot));
-		taskInfo->event_type = INT_POWER_FAULT_CLEAR;
+		info("Power fault cleared on Slot(%s)\n", p_slot->name);
+		event_type = INT_POWER_FAULT_CLEAR;
 	} else {
 		/*
 		 *   power fault
 		 */
-		info("Power fault on Slot(%s)\n", slot_name(p_slot));
-		taskInfo->event_type = INT_POWER_FAULT;
+		info("Power fault on Slot(%s)\n", p_slot->name);
+		event_type = INT_POWER_FAULT;
 		info("power fault bit %x set\n", hp_slot);
 	}
-	if (rc)
-		up(&event_semaphore);	/* signal event thread that new event is posted */
 
-	return rc;
+	queue_interrupt_event(p_slot, event_type);
+
+	return 1;
 }
 
 /* The following routines constitute the bulk of the 
@@ -357,13 +307,10 @@ static int remove_board(struct slot *p_slot)
 	return 0;
 }
 
-
-static void pushbutton_helper_thread(unsigned long data)
-{
-	pushbutton_pending = data;
-
-	up(&event_semaphore);
-}
+struct power_work_info {
+	struct slot *p_slot;
+	struct work_struct work;
+};
 
 /**
  * pciehp_pushbutton_thread
@@ -372,276 +319,214 @@ static void pushbutton_helper_thread(unsigned long data)
  * Handles all pending events and exits.
  *
  */
-static void pciehp_pushbutton_thread(unsigned long slot)
+static void pciehp_power_thread(struct work_struct *work)
 {
-	struct slot *p_slot = (struct slot *) slot;
-	u8 getstatus;
-	
-	pushbutton_pending = 0;
-
-	if (!p_slot) {
-		dbg("%s: Error! slot NULL\n", __FUNCTION__);
-		return;
-	}
-
-	p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
-	if (getstatus) {
-		p_slot->state = POWEROFF_STATE;
-		dbg("%s: disabling bus:device(%x:%x)\n", __FUNCTION__,
-				p_slot->bus, p_slot->device);
-
+	struct power_work_info *info =
+		container_of(work, struct power_work_info, work);
+	struct slot *p_slot = info->p_slot;
+
+	mutex_lock(&p_slot->lock);
+	switch (p_slot->state) {
+	case POWEROFF_STATE:
+		mutex_unlock(&p_slot->lock);
+		dbg("%s: disabling bus:device(%x:%x)\n",
+		    __FUNCTION__, p_slot->bus, p_slot->device);
 		pciehp_disable_slot(p_slot);
+		mutex_lock(&p_slot->lock);
 		p_slot->state = STATIC_STATE;
-	} else {
-		p_slot->state = POWERON_STATE;
-		dbg("%s: adding bus:device(%x:%x)\n", __FUNCTION__,
-				p_slot->bus, p_slot->device);
-
+		break;
+	case POWERON_STATE:
+		mutex_unlock(&p_slot->lock);
 		if (pciehp_enable_slot(p_slot) &&
 		    PWR_LED(p_slot->ctrl->ctrlcap))
 			p_slot->hpc_ops->green_led_off(p_slot);
-
+		mutex_lock(&p_slot->lock);
 		p_slot->state = STATIC_STATE;
+		break;
+	default:
+		break;
 	}
+	mutex_unlock(&p_slot->lock);
 
-	return;
+	kfree(info);
 }
 
-/**
- * pciehp_surprise_rm_thread
- *
- * Scheduled procedure to handle blocking stuff for the surprise removal
- * Handles all pending events and exits.
- *
- */
-static void pciehp_surprise_rm_thread(unsigned long slot)
+void pciehp_queue_pushbutton_work(struct work_struct *work)
 {
-	struct slot *p_slot = (struct slot *) slot;
-	u8 getstatus;
-	
-	surprise_rm_pending = 0;
+	struct slot *p_slot = container_of(work, struct slot, work.work);
+	struct power_work_info *info;
 
-	if (!p_slot) {
-		dbg("%s: Error! slot NULL\n", __FUNCTION__);
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		err("%s: Cannot allocate memory\n", __FUNCTION__);
 		return;
 	}
+	info->p_slot = p_slot;
+	INIT_WORK(&info->work, pciehp_power_thread);
 
-	p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
-	if (!getstatus) {
+	mutex_lock(&p_slot->lock);
+	switch (p_slot->state) {
+	case BLINKINGOFF_STATE:
 		p_slot->state = POWEROFF_STATE;
-		dbg("%s: removing bus:device(%x:%x)\n",
-				__FUNCTION__, p_slot->bus, p_slot->device);
-
-		pciehp_disable_slot(p_slot);
-		p_slot->state = STATIC_STATE;
-	} else {
+		break;
+	case BLINKINGON_STATE:
 		p_slot->state = POWERON_STATE;
-		dbg("%s: adding bus:device(%x:%x)\n",
-				__FUNCTION__, p_slot->bus, p_slot->device);
-
-		if (pciehp_enable_slot(p_slot) &&
-		    PWR_LED(p_slot->ctrl->ctrlcap))
-			p_slot->hpc_ops->green_led_off(p_slot);
-
-		p_slot->state = STATIC_STATE;
+		break;
+	default:
+		goto out;
 	}
-
-	return;
+	queue_work(pciehp_wq, &info->work);
+ out:
+	mutex_unlock(&p_slot->lock);
 }
 
-
-
-/* this is the main worker thread */
-static int event_thread(void* data)
-{
-	struct controller *ctrl;
-	lock_kernel();
-	daemonize("pciehpd_event");
-
-	unlock_kernel();
-
-	while (1) {
-		dbg("!!!!event_thread sleeping\n");
-		down_interruptible (&event_semaphore);
-		dbg("event_thread woken finished = %d\n", event_finished);
-		if (event_finished || signal_pending(current))
-			break;
-		/* Do stuff here */
-		if (pushbutton_pending)
-			pciehp_pushbutton_thread(pushbutton_pending);
-		else if (surprise_rm_pending)
-			pciehp_surprise_rm_thread(surprise_rm_pending);
-		else
-			for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next)
-				interrupt_event_handler(ctrl);
-	}
-	dbg("event_thread signals exit\n");
-	up(&event_exit);
-	return 0;
-}
-
-int pciehp_event_start_thread(void)
-{
-	int pid;
-
-	/* initialize our semaphores */
-	init_MUTEX_LOCKED(&event_exit);
-	event_finished=0;
-
-	init_MUTEX_LOCKED(&event_semaphore);
-	pid = kernel_thread(event_thread, NULL, 0);
-
-	if (pid < 0) {
-		err ("Can't start up our event thread\n");
-		return -1;
-	}
-	return 0;
-}
-
-
-void pciehp_event_stop_thread(void)
-{
-	event_finished = 1;
-	up(&event_semaphore);
-	down(&event_exit);
-}
-
-
 static int update_slot_info(struct slot *slot)
 {
 	struct hotplug_slot_info *info;
-	/* char buffer[SLOT_NAME_SIZE]; */
 	int result;
 
-	info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
-	/* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */
-
 	slot->hpc_ops->get_power_status(slot, &(info->power_status));
 	slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
 	slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
 	slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
 
-	/* result = pci_hp_change_slot_info(buffer, info); */
 	result = pci_hp_change_slot_info(slot->hotplug_slot, info);
 	kfree (info);
 	return result;
 }
 
-static void interrupt_event_handler(struct controller *ctrl)
+/*
+ * Note: This function must be called with slot->lock held
+ */
+static void handle_button_press_event(struct slot *p_slot)
 {
-	int loop = 0;
-	int change = 1;
-	u8 hp_slot;
+	struct controller *ctrl = p_slot->ctrl;
 	u8 getstatus;
-	struct slot *p_slot;
 
-	while (change) {
-		change = 0;
-
-		for (loop = 0; loop < MAX_EVENTS; loop++) {
-			if (ctrl->event_queue[loop].event_type != 0) {
-				hp_slot = ctrl->event_queue[loop].hp_slot;
-
-				p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
-				if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
-					dbg("button cancel\n");
-					del_timer(&p_slot->task_event);
-
-					switch (p_slot->state) {
-					case BLINKINGOFF_STATE:
-						if (PWR_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->green_led_on(p_slot);
-
-						if (ATTN_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->set_attention_status(p_slot, 0);
-						break;
-					case BLINKINGON_STATE:
-						if (PWR_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->green_led_off(p_slot);
-
-						if (ATTN_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->set_attention_status(p_slot, 0);
-						break;
-					default:
-						warn("Not a valid state\n");
-						return;
-					}
-					info("PCI slot #%s - action canceled due to button press.\n", slot_name(p_slot));
-					p_slot->state = STATIC_STATE;
-				}
-				/* ***********Button Pressed (No action on 1st press...) */
-				else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
-					
-					if (ATTN_BUTTN(ctrl->ctrlcap)) {
-						dbg("Button pressed\n");
-						p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
-						if (getstatus) {
-							/* slot is on */
-							dbg("slot is on\n");
-							p_slot->state = BLINKINGOFF_STATE;
-							info("PCI slot #%s - powering off due to button press.\n", slot_name(p_slot));
-						} else {
-							/* slot is off */
-							dbg("slot is off\n");
-							p_slot->state = BLINKINGON_STATE;
-							info("PCI slot #%s - powering on due to button press.\n", slot_name(p_slot));
-						}
-
-						/* blink green LED and turn off amber */
-						if (PWR_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->green_led_blink(p_slot);
-
-						if (ATTN_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->set_attention_status(p_slot, 0);
-
-						init_timer(&p_slot->task_event);
-						p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
-						p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
-						p_slot->task_event.data = (unsigned long) p_slot;
-
-						add_timer(&p_slot->task_event);
-					}
-				}
-				/***********POWER FAULT********************/
-				else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
-					if (POWER_CTRL(ctrl->ctrlcap)) {
-						dbg("power fault\n");
-						if (ATTN_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->set_attention_status(p_slot, 1);
-
-						if (PWR_LED(ctrl->ctrlcap))
-							p_slot->hpc_ops->green_led_off(p_slot);
-					}
-				}
-				/***********SURPRISE REMOVAL********************/
-				else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) || 
-					(ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) {
-					if (HP_SUPR_RM(ctrl->ctrlcap)) {
-						dbg("Surprise Removal\n");
-						if (p_slot) {
-							surprise_rm_pending = (unsigned long) p_slot;
-							up(&event_semaphore);
-							update_slot_info(p_slot);
-						}
-					}
-				} else {
-					/* refresh notification */
-					if (p_slot)
-						update_slot_info(p_slot);
-				}
-
-				ctrl->event_queue[loop].event_type = 0;
-
-				change = 1;
-			}
-		}		/* End of FOR loop */
+	switch (p_slot->state) {
+	case STATIC_STATE:
+		p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
+		if (getstatus) {
+			p_slot->state = BLINKINGOFF_STATE;
+			info("PCI slot #%s - powering off due to button "
+			     "press.\n", p_slot->name);
+		} else {
+			p_slot->state = BLINKINGON_STATE;
+			info("PCI slot #%s - powering on due to button "
+			     "press.\n", p_slot->name);
+		}
+		/* blink green LED and turn off amber */
+		if (PWR_LED(ctrl->ctrlcap))
+			p_slot->hpc_ops->green_led_blink(p_slot);
+		if (ATTN_LED(ctrl->ctrlcap))
+			p_slot->hpc_ops->set_attention_status(p_slot, 0);
+
+		schedule_delayed_work(&p_slot->work, 5*HZ);
+		break;
+	case BLINKINGOFF_STATE:
+	case BLINKINGON_STATE:
+		/*
+		 * Cancel if we are still blinking; this means that we
+		 * press the attention again before the 5 sec. limit
+		 * expires to cancel hot-add or hot-remove
+		 */
+		info("Button cancel on Slot(%s)\n", p_slot->name);
+		dbg("%s: button cancel\n", __FUNCTION__);
+		cancel_delayed_work(&p_slot->work);
+		if (p_slot->state == BLINKINGOFF_STATE) {
+			if (PWR_LED(ctrl->ctrlcap))
+				p_slot->hpc_ops->green_led_on(p_slot);
+		} else {
+			if (PWR_LED(ctrl->ctrlcap))
+				p_slot->hpc_ops->green_led_off(p_slot);
+		}
+		if (ATTN_LED(ctrl->ctrlcap))
+			p_slot->hpc_ops->set_attention_status(p_slot, 0);
+		info("PCI slot #%s - action canceled due to button press\n",
+		     p_slot->name);
+		p_slot->state = STATIC_STATE;
+		break;
+	case POWEROFF_STATE:
+	case POWERON_STATE:
+		/*
+		 * Ignore if the slot is on power-on or power-off state;
+		 * this means that the previous attention button action
+		 * to hot-add or hot-remove is undergoing
+		 */
+		info("Button ignore on Slot(%s)\n", p_slot->name);
+		update_slot_info(p_slot);
+		break;
+	default:
+		warn("Not a valid state\n");
+		break;
 	}
 }
 
+/*
+ * Note: This function must be called with slot->lock held
+ */
+static void handle_surprise_event(struct slot *p_slot)
+{
+	u8 getstatus;
+	struct power_work_info *info;
+
+	info = kmalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		err("%s: Cannot allocate memory\n", __FUNCTION__);
+		return;
+	}
+	info->p_slot = p_slot;
+	INIT_WORK(&info->work, pciehp_power_thread);
+
+	p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
+	if (!getstatus)
+		p_slot->state = POWEROFF_STATE;
+	else
+		p_slot->state = POWERON_STATE;
+
+	queue_work(pciehp_wq, &info->work);
+}
+
+static void interrupt_event_handler(struct work_struct *work)
+{
+	struct event_info *info = container_of(work, struct event_info, work);
+	struct slot *p_slot = info->p_slot;
+	struct controller *ctrl = p_slot->ctrl;
+
+	mutex_lock(&p_slot->lock);
+	switch (info->event_type) {
+	case INT_BUTTON_PRESS:
+		handle_button_press_event(p_slot);
+		break;
+	case INT_POWER_FAULT:
+		if (!POWER_CTRL(ctrl->ctrlcap))
+			break;
+		if (ATTN_LED(ctrl->ctrlcap))
+			p_slot->hpc_ops->set_attention_status(p_slot, 1);
+		if (PWR_LED(ctrl->ctrlcap))
+			p_slot->hpc_ops->green_led_off(p_slot);
+		break;
+	case INT_PRESENCE_ON:
+	case INT_PRESENCE_OFF:
+		if (!HP_SUPR_RM(ctrl->ctrlcap))
+			break;
+		dbg("Surprise Removal\n");
+		update_slot_info(p_slot);
+		handle_surprise_event(p_slot);
+		break;
+	default:
+		update_slot_info(p_slot);
+		break;
+	}
+	mutex_unlock(&p_slot->lock);
+
+	kfree(info);
+}
+
 int pciehp_enable_slot(struct slot *p_slot)
 {
 	u8 getstatus = 0;
@@ -653,7 +538,7 @@ int pciehp_enable_slot(struct slot *p_slot)
 	rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 	if (rc || !getstatus) {
 		info("%s: no adapter on slot(%s)\n", __FUNCTION__,
-		     slot_name(p_slot));
+		     p_slot->name);
 		mutex_unlock(&p_slot->ctrl->crit_sect);
 		return -ENODEV;
 	}
@@ -661,7 +546,7 @@ int pciehp_enable_slot(struct slot *p_slot)
 		rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 		if (rc || getstatus) {
 			info("%s: latch open on slot(%s)\n", __FUNCTION__,
-			     slot_name(p_slot));
+			     p_slot->name);
 			mutex_unlock(&p_slot->ctrl->crit_sect);
 			return -ENODEV;
 		}
@@ -671,7 +556,7 @@ int pciehp_enable_slot(struct slot *p_slot)
 		rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 		if (rc || getstatus) {
 			info("%s: already enabled on slot(%s)\n", __FUNCTION__,
-			     slot_name(p_slot));
+			     p_slot->name);
 			mutex_unlock(&p_slot->ctrl->crit_sect);
 			return -EINVAL;
 		}
@@ -706,7 +591,7 @@ int pciehp_disable_slot(struct slot *p_slot)
 		ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 		if (ret || !getstatus) {
 			info("%s: no adapter on slot(%s)\n", __FUNCTION__,
-			     slot_name(p_slot));
+			     p_slot->name);
 			mutex_unlock(&p_slot->ctrl->crit_sect);
 			return -ENODEV;
 		}
@@ -716,7 +601,7 @@ int pciehp_disable_slot(struct slot *p_slot)
 		ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 		if (ret || getstatus) {
 			info("%s: latch open on slot(%s)\n", __FUNCTION__,
-			     slot_name(p_slot));
+			     p_slot->name);
 			mutex_unlock(&p_slot->ctrl->crit_sect);
 			return -ENODEV;
 		}
@@ -726,7 +611,7 @@ int pciehp_disable_slot(struct slot *p_slot)
 		ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 		if (ret || !getstatus) {
 			info("%s: already disabled slot(%s)\n", __FUNCTION__,
-			     slot_name(p_slot));
+			     p_slot->name);
 			mutex_unlock(&p_slot->ctrl->crit_sect);
 			return -EINVAL;
 		}
@@ -739,3 +624,66 @@ int pciehp_disable_slot(struct slot *p_slot)
 	return ret;
 }
 
+int pciehp_sysfs_enable_slot(struct slot *p_slot)
+{
+	int retval = -ENODEV;
+
+	mutex_lock(&p_slot->lock);
+	switch (p_slot->state) {
+	case BLINKINGON_STATE:
+		cancel_delayed_work(&p_slot->work);
+	case STATIC_STATE:
+		p_slot->state = POWERON_STATE;
+		mutex_unlock(&p_slot->lock);
+		retval = pciehp_enable_slot(p_slot);
+		mutex_lock(&p_slot->lock);
+		p_slot->state = STATIC_STATE;
+		break;
+	case POWERON_STATE:
+		info("Slot %s is already in powering on state\n",
+		     p_slot->name);
+		break;
+	case BLINKINGOFF_STATE:
+	case POWEROFF_STATE:
+		info("Already enabled on slot %s\n", p_slot->name);
+		break;
+	default:
+		err("Not a valid state on slot %s\n", p_slot->name);
+		break;
+	}
+	mutex_unlock(&p_slot->lock);
+
+	return retval;
+}
+
+int pciehp_sysfs_disable_slot(struct slot *p_slot)
+{
+	int retval = -ENODEV;
+
+	mutex_lock(&p_slot->lock);
+	switch (p_slot->state) {
+	case BLINKINGOFF_STATE:
+		cancel_delayed_work(&p_slot->work);
+	case STATIC_STATE:
+		p_slot->state = POWEROFF_STATE;
+		mutex_unlock(&p_slot->lock);
+		retval = pciehp_disable_slot(p_slot);
+		mutex_lock(&p_slot->lock);
+		p_slot->state = STATIC_STATE;
+		break;
+	case POWEROFF_STATE:
+		info("Slot %s is already in powering off state\n",
+		     p_slot->name);
+		break;
+	case BLINKINGON_STATE:
+	case POWERON_STATE:
+		info("Already disabled on slot %s\n", p_slot->name);
+		break;
+	default:
+		err("Not a valid state on slot %s\n", p_slot->name);
+		break;
+	}
+	mutex_unlock(&p_slot->lock);
+
+	return retval;
+}
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index fbc64aa..9aac6a8 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -71,6 +71,8 @@
 #define DBG_LEAVE_ROUTINE
 #endif				/* DEBUG */
 
+static atomic_t pciehp_num_controllers = ATOMIC_INIT(0);
+
 struct ctrl_reg {
 	u8 cap_id;
 	u8 nxt_ptr;
@@ -219,10 +221,7 @@ static inline int pciehp_writel(struct controller *ctrl, int reg, u32 value)
 #define EMI_STATE		0x0080
 #define EMI_STATUS_BIT		7
 
-static spinlock_t hpc_event_lock;
-
 DEFINE_DBG_BUFFER		/* Debug string buffer for entire HPC defined here */
-static int ctlr_seq_num = 0;	/* Controller sequence # */
 
 static irqreturn_t pcie_isr(int irq, void *dev_id);
 static void start_int_poll_timer(struct controller *ctrl, int sec);
@@ -656,6 +655,13 @@ static void hpc_release_ctlr(struct controller *ctrl)
 	else
 		free_irq(ctrl->pci_dev->irq, ctrl);
 
+	/*
+	 * If this is the last controller to be released, destroy the
+	 * pciehp work queue
+	 */
+	if (atomic_dec_and_test(&pciehp_num_controllers))
+		destroy_workqueue(pciehp_wq);
+
 	DBG_LEAVE_ROUTINE
 }
 
@@ -1152,7 +1158,6 @@ int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
 int pcie_init(struct controller * ctrl, struct pcie_device *dev)
 {
 	int rc;
-	static int first = 1;
 	u16 temp_word;
 	u16 cap_reg;
 	u16 intr_enable = 0;
@@ -1221,11 +1226,6 @@ int pcie_init(struct controller * ctrl, struct pcie_device *dev)
 	dbg("%s: SLOTCTRL offset %x slot_ctrl %x\n",
 	    __FUNCTION__, ctrl->cap_base + SLOTCTRL, slot_ctrl);
 
-	if (first) {
-		spin_lock_init(&hpc_event_lock);
-		first = 0;
-	}
-
 	for ( rc = 0; rc < DEVICE_COUNT_RESOURCE; rc++)
 		if (pci_resource_len(pdev, rc) > 0)
 			dbg("pci resource[%d] start=0x%llx(len=0x%llx)\n", rc,
@@ -1286,7 +1286,8 @@ int pcie_init(struct controller * ctrl, struct pcie_device *dev)
 		rc = request_irq(ctrl->pci_dev->irq, pcie_isr, IRQF_SHARED,
 				 MY_NAME, (void *)ctrl);
 		dbg("%s: request_irq %d for hpc%d (returns %d)\n",
-		    __FUNCTION__, ctrl->pci_dev->irq, ctlr_seq_num, rc);
+		    __FUNCTION__, ctrl->pci_dev->irq,
+		    atomic_read(&pciehp_num_controllers), rc);
 		if (rc) {
 			err("Can't get irq %d for the hotplug controller\n",
 			    ctrl->pci_dev->irq);
@@ -1296,6 +1297,18 @@ int pcie_init(struct controller * ctrl, struct pcie_device *dev)
 	dbg("pciehp ctrl b:d:f:irq=0x%x:%x:%x:%x\n", pdev->bus->number,
 		PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), dev->irq);
 
+	/*
+	 * If this is the first controller to be initialized,
+	 * initialize the pciehp work queue
+	 */
+	if (atomic_add_return(1, &pciehp_num_controllers) == 1) {
+		pciehp_wq = create_singlethread_workqueue("pciehpd");
+		if (!pciehp_wq) {
+			rc = -ENOMEM;
+			goto abort_free_irq;
+		}
+	}
+
 	rc = pciehp_readw(ctrl, SLOTCTRL, &temp_word);
 	if (rc) {
 		err("%s: Cannot read SLOTCTRL register\n", __FUNCTION__);
@@ -1349,7 +1362,6 @@ int pcie_init(struct controller * ctrl, struct pcie_device *dev)
 			goto abort_disable_intr;
 	}
 
-	ctlr_seq_num++;
 	ctrl->hpc_ops = &pciehp_hpc_ops;
 
 	DBG_LEAVE_ROUTINE
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index 7238346..bb3c101 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -98,7 +98,15 @@ static struct device_node *find_dlpar_node(char *drc_name, int *node_type)
 	return NULL;
 }
 
-static struct slot *find_slot(struct device_node *dn)
+/**
+ * find_php_slot - return hotplug slot structure for device node
+ *
+ * This routine will return the hotplug slot structure
+ * for a given device node. Note that built-in PCI slots
+ * may be dlpar-able, but not hot-pluggable, so this routine
+ * will return NULL for built-in PCI slots.
+ */
+static struct slot *find_php_slot(struct device_node *dn)
 {
 	struct list_head *tmp, *n;
 	struct slot *slot;
@@ -224,9 +232,9 @@ static int dlpar_remove_phb(char *drc_name, struct device_node *dn)
 	if (!pcibios_find_pci_bus(dn))
 		return -EINVAL;
 
-	slot = find_slot(dn);
+	/* If pci slot is hotplugable, use hotplug to remove it */
+	slot = find_php_slot(dn);
 	if (slot) {
-		/* Remove hotplug slot */
 		if (rpaphp_deregister_slot(slot)) {
 			printk(KERN_ERR
 				"%s: unable to remove hotplug slot %s\n",
@@ -370,22 +378,17 @@ int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
 	if (!bus)
 		return -EINVAL;
 
-	slot = find_slot(dn);
+	/* If pci slot is hotplugable, use hotplug to remove it */
+	slot = find_php_slot(dn);
 	if (slot) {
-		/* Remove hotplug slot */
 		if (rpaphp_deregister_slot(slot)) {
 			printk(KERN_ERR
 				"%s: unable to remove hotplug slot %s\n",
 				__FUNCTION__, drc_name);
 			return -EIO;
 		}
-	} else {
-		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);
-		}
-	}
+	} else
+		pcibios_remove_pci_devices(bus);
 
 	if (unmap_bus_range(bus)) {
 		printk(KERN_ERR "%s: failed to unmap bus range\n",
diff --git a/drivers/pci/hotplug/rpaphp.h b/drivers/pci/hotplug/rpaphp.h
index 2e7accf..c822a77 100644
--- a/drivers/pci/hotplug/rpaphp.h
+++ b/drivers/pci/hotplug/rpaphp.h
@@ -83,19 +83,15 @@ struct slot {
 
 extern struct hotplug_slot_ops rpaphp_hotplug_slot_ops;
 extern struct list_head rpaphp_slot_head;
-extern int num_slots;
 
 /* function prototypes */
 
 /* rpaphp_pci.c */
-extern int rpaphp_enable_pci_slot(struct slot *slot);
-extern int rpaphp_register_pci_slot(struct slot *slot);
-extern int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value);
+extern int rpaphp_enable_slot(struct slot *slot);
 extern int rpaphp_get_sensor_state(struct slot *slot, int *state);
 
 /* rpaphp_core.c */
 extern int rpaphp_add_slot(struct device_node *dn);
-extern int rpaphp_remove_slot(struct slot *slot);
 extern int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
 		char **drc_name, char **drc_type, int *drc_power_domain);
 
@@ -104,7 +100,5 @@ extern void dealloc_slot_struct(struct slot *slot);
 extern struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, int power_domain);
 extern int rpaphp_register_slot(struct slot *slot);
 extern int rpaphp_deregister_slot(struct slot *slot);
-extern int rpaphp_get_power_status(struct slot *slot, u8 * value);
-extern int rpaphp_set_attention_status(struct slot *slot, u8 status);
 	
 #endif				/* _PPC64PHP_H */
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index 353da5b..899eed0 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -39,9 +39,7 @@
 #include "rpaphp.h"
 
 int debug;
-static struct semaphore rpaphp_sem;
 LIST_HEAD(rpaphp_slot_head);
-int num_slots;
 
 #define DRIVER_VERSION	"0.1"
 #define DRIVER_AUTHOR	"Linda Xie <lxie@us.ibm.com>"
@@ -55,11 +53,6 @@ MODULE_LICENSE("GPL");
 
 module_param(debug, bool, 0644);
 
-static int rpaphp_get_attention_status(struct slot *slot)
-{
-	return slot->hotplug_slot->info->attention_status;
-}
-
 /**
  * set_attention_status - set attention LED
  * echo 0 > attention -- set LED OFF
@@ -69,79 +62,75 @@ static int rpaphp_get_attention_status(struct slot *slot)
  */
 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
 {
-	int retval = 0;
+	int rc;
 	struct slot *slot = (struct slot *)hotplug_slot->private;
 
-	down(&rpaphp_sem);
 	switch (value) {
 	case 0:
-		retval = rpaphp_set_attention_status(slot, LED_OFF);
-		hotplug_slot->info->attention_status = 0;
-		break;
 	case 1:
-	default:
-		retval = rpaphp_set_attention_status(slot, LED_ON);
-		hotplug_slot->info->attention_status = 1;
-		break;
 	case 2:
-		retval = rpaphp_set_attention_status(slot, LED_ID);
-		hotplug_slot->info->attention_status = 2;
+		break;
+	default:
+		value = 1;
 		break;
 	}
-	up(&rpaphp_sem);
-	return retval;
+
+	rc = rtas_set_indicator(DR_INDICATOR, slot->index, value);
+	if (!rc)
+		hotplug_slot->info->attention_status = value;
+
+	return rc;
 }
 
 /**
  * get_power_status - get power status of a slot
  * @hotplug_slot: slot to get status
  * @value: pointer to store status
- *
- *
  */
 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
 {
-	int retval;
+	int retval, level;
 	struct slot *slot = (struct slot *)hotplug_slot->private;
 
-	down(&rpaphp_sem);
-	retval = rpaphp_get_power_status(slot, value);
-	up(&rpaphp_sem);
+	retval = rtas_get_power_level (slot->power_domain, &level);
+	if (!retval)
+		*value = level;
 	return retval;
 }
 
 /**
  * get_attention_status - get attention LED status
- *
- *
  */
 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
 {
-	int retval = 0;
 	struct slot *slot = (struct slot *)hotplug_slot->private;
-
-	down(&rpaphp_sem);
-	*value = rpaphp_get_attention_status(slot);
-	up(&rpaphp_sem);
-	return retval;
+	*value = slot->hotplug_slot->info->attention_status;
+	return 0;
 }
 
 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value)
 {
 	struct slot *slot = (struct slot *)hotplug_slot->private;
-	int retval = 0;
+	int rc, state;
 
-	down(&rpaphp_sem);
-	retval = rpaphp_get_pci_adapter_status(slot, 0, value);
-	up(&rpaphp_sem);
-	return retval;
+	rc = rpaphp_get_sensor_state(slot, &state);
+
+	*value = NOT_VALID;
+	if (rc)
+		return rc;
+
+	if (state == EMPTY)
+		*value = EMPTY;
+	else if (state == PRESENT)
+		*value = slot->state;
+
+	return 0;
 }
 
 static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 {
 	struct slot *slot = (struct slot *)hotplug_slot->private;
 
-	down(&rpaphp_sem);
 	switch (slot->type) {
 	case 1:
 	case 2:
@@ -172,7 +161,6 @@ static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_spe
 		break;
 
 	}
-	up(&rpaphp_sem);
 	return 0;
 }
 
@@ -265,6 +253,14 @@ static int is_php_type(char *drc_type)
 	return 1;
 }
 
+/**
+ * is_php_dn() - return 1 if this is a hotpluggable pci slot, else 0
+ *
+ * This routine will return true only if the device node is
+ * a hotpluggable slot. This routine will return false
+ * for built-in pci slots (even when the built-in slots are
+ * dlparable.)
+ */
 static int is_php_dn(struct device_node *dn, const int **indexes,
 		const int **names, const int **types, const int **power_domains)
 {
@@ -272,24 +268,31 @@ static int is_php_dn(struct device_node *dn, const int **indexes,
 	int rc;
 
 	rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
-	if (rc >= 0) {
-		if (is_php_type((char *) &drc_types[1])) {
-			*types = drc_types;
-			return 1;
-		}
-	}
+	if (rc < 0)
+		return 0;
 
-	return 0;
+	if (!is_php_type((char *) &drc_types[1]))
+		return 0;
+
+	*types = drc_types;
+	return 1;
 }
 
 /**
- * rpaphp_add_slot -- add hotplug or dlpar slot
+ * rpaphp_add_slot -- declare a hotplug slot to the hotplug subsystem.
+ * @dn device node of slot
+ *
+ * This subroutine will register a hotplugable slot with the
+ * PCI hotplug infrastructure. This routine is typicaly called
+ * during boot time, if the hotplug slots are present at boot time,
+ * or is called later, by the dlpar add code, if the slot is
+ * being dynamically added during runtime.
+ *
+ * If the device node points at an embedded (built-in) slot, this
+ * routine will just return without doing anything, since embedded
+ * slots cannot be hotplugged.
  *
- *	rpaphp not only registers PCI hotplug slots(HOTPLUG), 
- *	but also logical DR slots(EMBEDDED).
- *	HOTPLUG slot: An adapter can be physically added/removed. 
- *	EMBEDDED slot: An adapter can be logically removed/added
- *		  from/to a partition with the slot.
+ * To remove a slot, it suffices to call rpaphp_deregister_slot()
  */
 int rpaphp_add_slot(struct device_node *dn)
 {
@@ -299,34 +302,42 @@ int rpaphp_add_slot(struct device_node *dn)
 	const int *indexes, *names, *types, *power_domains;
 	char *name, *type;
 
+	if (!dn->name || strcmp(dn->name, "pci"))
+		return 0;
+
+	/* If this is not a hotplug slot, return without doing anything. */
+	if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
+		return 0;
+
 	dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);
 
 	/* register PCI devices */
-	if (dn->name != 0 && strcmp(dn->name, "pci") == 0) {
-		if (!is_php_dn(dn, &indexes, &names, &types, &power_domains))
-			goto exit;
-
-		name = (char *) &names[1];
-		type = (char *) &types[1];
-		for (i = 0; i < indexes[0]; i++,
-	     		name += (strlen(name) + 1), type += (strlen(type) + 1)) 		{
-
-			if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name,
-				       power_domains[i + 1]))) {
-				retval = -ENOMEM;
-				goto exit;
-			}
-			slot->type = simple_strtoul(type, NULL, 10);
+	name = (char *) &names[1];
+	type = (char *) &types[1];
+	for (i = 0; i < indexes[0]; i++) {
+
+		slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
+		if (!slot)
+			return -ENOMEM;
+
+		slot->type = simple_strtoul(type, NULL, 10);
 				
-			dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
-					indexes[i + 1], name, type);
+		dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
+				indexes[i + 1], name, type);
 
-			retval = rpaphp_register_pci_slot(slot);
-		}
+		retval = rpaphp_enable_slot(slot);
+		if (!retval)
+			retval = rpaphp_register_slot(slot);
+
+		if (retval)
+			dealloc_slot_struct(slot);
+
+		name += strlen(name) + 1;
+		type += strlen(type) + 1;
 	}
-exit:
-	dbg("%s - Exit: num_slots=%d rc[%d]\n",
-	    __FUNCTION__, num_slots, retval);
+	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+
+	/* XXX FIXME: reports a failure only if last entry in loop failed */
 	return retval;
 }
 
@@ -354,7 +365,6 @@ static int __init rpaphp_init(void)
 	struct device_node *dn = NULL;
 
 	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
-	init_MUTEX(&rpaphp_sem);
 
 	while ((dn = of_find_node_by_name(dn, "pci")))
 		rpaphp_add_slot(dn);
@@ -367,8 +377,9 @@ static void __exit rpaphp_exit(void)
 	cleanup_slots();
 }
 
-static int __enable_slot(struct slot *slot)
+static int enable_slot(struct hotplug_slot *hotplug_slot)
 {
+	struct slot *slot = (struct slot *)hotplug_slot->private;
 	int state;
 	int retval;
 
@@ -392,46 +403,17 @@ static int __enable_slot(struct slot *slot)
 	return 0;
 }
 
-static int enable_slot(struct hotplug_slot *hotplug_slot)
+static int disable_slot(struct hotplug_slot *hotplug_slot)
 {
-	int retval;
 	struct slot *slot = (struct slot *)hotplug_slot->private;
-
-	down(&rpaphp_sem);
-	retval = __enable_slot(slot);
-	up(&rpaphp_sem);
-
-	return retval;
-}
-
-static int __disable_slot(struct slot *slot)
-{
-	struct pci_dev *dev, *tmp;
-
 	if (slot->state == NOT_CONFIGURED)
 		return -EINVAL;
 
-	list_for_each_entry_safe(dev, tmp, &slot->bus->devices, bus_list) {
-		eeh_remove_bus_device(dev);
-		pci_remove_bus_device(dev);
-	}
-
+	pcibios_remove_pci_devices(slot->bus);
 	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 = __disable_slot (slot);
-	up(&rpaphp_sem);
-
-	return retval;
-}
-
 struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
 	.owner = THIS_MODULE,
 	.enable_slot = enable_slot,
diff --git a/drivers/pci/hotplug/rpaphp_pci.c b/drivers/pci/hotplug/rpaphp_pci.c
index 6f6cbed..54ca865 100644
--- a/drivers/pci/hotplug/rpaphp_pci.c
+++ b/drivers/pci/hotplug/rpaphp_pci.c
@@ -64,75 +64,6 @@ int rpaphp_get_sensor_state(struct slot *slot, int *state)
 	return rc;
 }
 
-/**
- * get_pci_adapter_status - get the status of a slot
- * 
- * 0-- slot is empty
- * 1-- adapter is configured
- * 2-- adapter is not configured
- * 3-- not valid
- */
-int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
-{
-	struct pci_bus *bus;
-	int state, rc;
-
-	*value = NOT_VALID;
-	rc = rpaphp_get_sensor_state(slot, &state);
-	if (rc)
-		goto exit;
-
- 	if (state == EMPTY)
- 		*value = EMPTY;
- 	else if (state == PRESENT) {
-		if (!is_init) {
-			/* at run-time slot->state can be changed by */
-			/* config/unconfig adapter */
-			*value = slot->state;
-		} else {
-			bus = pcibios_find_pci_bus(slot->dn);
-			if (bus && !list_empty(&bus->devices))
-				*value = CONFIGURED;
-			else
-				*value = NOT_CONFIGURED;
-		}
-	}
-exit:
-	return rc;
-}
-
-static void print_slot_pci_funcs(struct pci_bus *bus)
-{
-	struct device_node *dn;
-	struct pci_dev *dev;
-
-	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 setup_pci_hotplug_slot_info(struct slot *slot)
-{
-	struct hotplug_slot_info *hotplug_slot_info = slot->hotplug_slot->info;
-
-	dbg("%s Initilize the PCI slot's hotplug->info structure ...\n",
-	    __FUNCTION__);
-	rpaphp_get_power_status(slot, &hotplug_slot_info->power_status);
-	rpaphp_get_pci_adapter_status(slot, 1,
-				      &hotplug_slot_info->adapter_status);
-	if (hotplug_slot_info->adapter_status == NOT_VALID) {
-		err("%s: NOT_VALID: skip dn->full_name=%s\n",
-		    __FUNCTION__, slot->dn->full_name);
-		return -EINVAL;
-	}
-	return 0;
-}
-
 static void set_slot_name(struct slot *slot)
 {
 	struct pci_bus *bus = slot->bus;
@@ -146,69 +77,73 @@ static void set_slot_name(struct slot *slot)
 			bus->number);
 }
 
-static int setup_pci_slot(struct slot *slot)
+/**
+ * rpaphp_enable_slot - record slot state, config pci device
+ *
+ * Initialize values in the slot, and the hotplug_slot info
+ * structures to indicate if there is a pci card plugged into
+ * the slot. If the slot is not empty, run the pcibios routine
+ * to get pcibios stuff correctly set up.
+ */
+int rpaphp_enable_slot(struct slot *slot)
 {
-	struct device_node *dn = slot->dn;
+	int rc, level, state;
 	struct pci_bus *bus;
+	struct hotplug_slot_info *info = slot->hotplug_slot->info;
+
+	info->adapter_status = NOT_VALID;
+	slot->state = EMPTY;
+
+	/* Find out if the power is turned on for the slot */
+	rc = rtas_get_power_level(slot->power_domain, &level);
+	if (rc)
+		return rc;
+	info->power_status = level;
+
+	/* Figure out if there is an adapter in the slot */
+	rc = rpaphp_get_sensor_state(slot, &state);
+	if (rc)
+		return rc;
 
-	BUG_ON(!dn);
-	bus = pcibios_find_pci_bus(dn);
+	bus = pcibios_find_pci_bus(slot->dn);
 	if (!bus) {
-		err("%s: no pci_bus for dn %s\n", __FUNCTION__, dn->full_name);
-		goto exit_rc;
+		err("%s: no pci_bus for dn %s\n", __FUNCTION__, slot->dn->full_name);
+		return -EINVAL;
 	}
 
+	info->adapter_status = EMPTY;
 	slot->bus = bus;
 	slot->pci_devs = &bus->devices;
 	set_slot_name(slot);
 
-	/* find slot's pci_dev if it's not empty */
-	if (slot->hotplug_slot->info->adapter_status == EMPTY) {
-		slot->state = EMPTY;	/* slot is empty */
-	} else {
-		/* slot is occupied */
-		if (!dn->child) {
-			/* non-empty slot has to have child */
-			err("%s: slot[%s]'s device_node doesn't have child for adapter\n", 
-				__FUNCTION__, slot->name);
-			goto exit_rc;
+	/* if there's an adapter in the slot, go add the pci devices */
+	if (state == PRESENT) {
+		info->adapter_status = NOT_CONFIGURED;
+		slot->state = NOT_CONFIGURED;
+
+		/* non-empty slot has to have child */
+		if (!slot->dn->child) {
+			err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
+			    __FUNCTION__, slot->name);
+			return -EINVAL;
 		}
 
-		if (slot->hotplug_slot->info->adapter_status == NOT_CONFIGURED) {
-			dbg("%s CONFIGURING pci adapter in slot[%s]\n",  
-				__FUNCTION__, slot->name);
-			pcibios_add_pci_devices(slot->bus);
+		if (list_empty(&bus->devices))
+			pcibios_add_pci_devices(bus);
 
-		} else if (slot->hotplug_slot->info->adapter_status != CONFIGURED) {
-			err("%s: slot[%s]'s adapter_status is NOT_VALID.\n",
-				__FUNCTION__, slot->name);
-			goto exit_rc;
-		}
-		print_slot_pci_funcs(slot->bus);
-		if (!list_empty(slot->pci_devs)) {
+		if (!list_empty(&bus->devices)) {
+			info->adapter_status = CONFIGURED;
 			slot->state = CONFIGURED;
-		} else {
-			/* DLPAR add as opposed to 
-		 	 * boot time */
-			slot->state = NOT_CONFIGURED;
+		}
+
+		if (debug) {
+			struct pci_dev *dev;
+			dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, slot->dn->full_name);
+			list_for_each_entry (dev, &bus->devices, bus_list)
+				dbg("\t%s\n", pci_name(dev));
 		}
 	}
-	return 0;
-exit_rc:
-	dealloc_slot_struct(slot);
-	return -EINVAL;
-}
 
-int rpaphp_register_pci_slot(struct slot *slot)
-{
-	int rc = -EINVAL;
-
-	if (setup_pci_hotplug_slot_info(slot))
-		goto exit_rc;
-	if (setup_pci_slot(slot))
-		goto exit_rc;
-	rc = rpaphp_register_slot(slot);
-exit_rc:
-	return rc;
+	return 0;
 }
 
diff --git a/drivers/pci/hotplug/rpaphp_slot.c b/drivers/pci/hotplug/rpaphp_slot.c
index 3009193..d4ee872 100644
--- a/drivers/pci/hotplug/rpaphp_slot.c
+++ b/drivers/pci/hotplug/rpaphp_slot.c
@@ -56,7 +56,6 @@ static struct hotplug_slot_attribute php_attr_location = {
 static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
 {
 	struct slot *slot = (struct slot *) hotplug_slot->private;
-
 	dealloc_slot_struct(slot);
 }
 
@@ -65,12 +64,12 @@ void dealloc_slot_struct(struct slot *slot)
 	kfree(slot->hotplug_slot->info);
 	kfree(slot->hotplug_slot->name);
 	kfree(slot->hotplug_slot);
+	kfree(slot->location);
 	kfree(slot);
-	return;
 }
 
-struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name,
-		  int power_domain)
+struct slot *alloc_slot_struct(struct device_node *dn,
+                       int drc_index, char *drc_name, int power_domain)
 {
 	struct slot *slot;
 	
@@ -115,7 +114,7 @@ error_nomem:
 
 static int is_registered(struct slot *slot)
 {
-	struct slot             *tmp_slot;
+	struct slot *tmp_slot;
 
 	list_for_each_entry(tmp_slot, &rpaphp_slot_head, rpaphp_slot_list) {
 		if (!strcmp(tmp_slot->name, slot->name))
@@ -140,8 +139,6 @@ int rpaphp_deregister_slot(struct slot *slot)
 	retval = pci_hp_deregister(php_slot);
 	if (retval)
 		err("Problem unregistering a slot %s\n", slot->name);
-	else
-		num_slots--;
 
 	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
 	return retval;
@@ -160,14 +157,13 @@ int rpaphp_register_slot(struct slot *slot)
 	/* should not try to register the same slot twice */
 	if (is_registered(slot)) {
 		err("rpaphp_register_slot: slot[%s] is already registered\n", slot->name);
-		retval = -EAGAIN;
-		goto register_fail;
+		return -EAGAIN;
 	}	
 
 	retval = pci_hp_register(php_slot);
 	if (retval) {
 		err("pci_hp_register failed with error %d\n", retval);
-		goto register_fail;
+		return retval;
 	}
 
 	/* create "phy_location" file */
@@ -181,43 +177,10 @@ int rpaphp_register_slot(struct slot *slot)
 	list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
 	info("Slot [%s](PCI location=%s) registered\n", slot->name,
 			slot->location);
-	num_slots++;
 	return 0;
 
 sysfs_fail:
 	pci_hp_deregister(php_slot);
-register_fail:
-	rpaphp_release_slot(php_slot);
 	return retval;
 }
 
-int rpaphp_get_power_status(struct slot *slot, u8 * value)
-{
-	int rc = 0, level;
-	
-	rc = rtas_get_power_level(slot->power_domain, &level);
-	if (rc < 0) {
-		err("failed to get power-level for slot(%s), rc=0x%x\n",
-			slot->location, rc);
-		return rc;
-	}
-
-	dbg("%s the power level of slot %s(pwd-domain:0x%x) is %d\n",
-		__FUNCTION__, slot->name, slot->power_domain, level);
-	*value = level;
-
-	return rc;
-}
-
-int rpaphp_set_attention_status(struct slot *slot, u8 status)
-{
-	int rc;
-
-	/* status: LED_OFF or LED_ON */
-	rc = rtas_set_indicator(DR_INDICATOR, slot->index, status);
-	if (rc < 0)
-		err("slot(name=%s location=%s index=0x%x) set attention-status(%d) failed! rc=0x%x\n",
-		    slot->name, slot->location, slot->index, status, rc);
-
-	return rc;
-}
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index 01d31a1..37ed088 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -166,7 +166,7 @@ extern u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
 extern int shpchp_configure_device(struct slot *p_slot);
 extern int shpchp_unconfigure_device(struct slot *p_slot);
 extern void cleanup_slots(struct controller *ctrl);
-extern void queue_pushbutton_work(struct work_struct *work);
+extern void shpchp_queue_pushbutton_work(struct work_struct *work);
 extern int shpc_init( struct controller *ctrl, struct pci_dev *pdev);
 
 #ifdef CONFIG_ACPI
diff --git a/drivers/pci/hotplug/shpchp_core.c b/drivers/pci/hotplug/shpchp_core.c
index 5f4bc08..80dec97 100644
--- a/drivers/pci/hotplug/shpchp_core.c
+++ b/drivers/pci/hotplug/shpchp_core.c
@@ -136,7 +136,7 @@ static int init_slots(struct controller *ctrl)
 		slot->hpc_ops = ctrl->hpc_ops;
 		slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
 		mutex_init(&slot->lock);
-		INIT_DELAYED_WORK(&slot->work, queue_pushbutton_work);
+		INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
 
 		/* register this slot with the hotplug pci core */
 		hotplug_slot->private = slot;
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index b746bd2..2c94d44 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -433,7 +433,7 @@ static void shpchp_pushbutton_thread(struct work_struct *work)
 	kfree(info);
 }
 
-void queue_pushbutton_work(struct work_struct *work)
+void shpchp_queue_pushbutton_work(struct work_struct *work)
 {
 	struct slot *p_slot = container_of(work, struct slot, work.work);
 	struct pushbutton_work_info *info;