minor improvements for ACPI dock and acpiphp drivers

index 14de9f4..e944e39 100644
@@ -1007,7 +1007,6 @@ static int __init dock_add(acpi_handle handle)
 	mutex_init(&dock_station->hp_lock);
 	spin_lock_init(&dock_station->dd_lock);
 	INIT_LIST_HEAD(&dock_station->sibling);
-	ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list);
 	INIT_LIST_HEAD(&dock_station->dependent_devices);
 
 	/* we want the dock device to send uevents */

@@ -1078,6 +1077,7 @@ int __init acpi_dock_init(void)
 		return 0;
 	}
 
+	ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list);
 	register_acpi_bus_notifier(&dock_acpi_notifier);
 	pr_info(PREFIX "%s: %d docks/bays found\n",
 		ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count);

index e944e39..a73571f 100644
@@ -63,7 +63,6 @@ struct dock_station {
 	acpi_handle handle;
 	unsigned long last_dock_time;
 	u32 flags;
-	spinlock_t dd_lock;
 	struct mutex hp_lock;
 	struct list_head dependent_devices;
 

@@ -112,10 +111,7 @@ add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 
 	dd->handle = handle;
 	INIT_LIST_HEAD(&dd->list);
-
-	spin_lock(&ds->dd_lock);
 	list_add_tail(&dd->list, &ds->dependent_devices);
-	spin_unlock(&ds->dd_lock);
 
 	return 0;
 }

@@ -220,14 +216,10 @@ find_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 {
 	struct dock_dependent_device *dd;
 
-	spin_lock(&ds->dd_lock);
-	list_for_each_entry(dd, &ds->dependent_devices, list) {
-		if (handle == dd->handle) {
-			spin_unlock(&ds->dd_lock);
+	list_for_each_entry(dd, &ds->dependent_devices, list)
+		if (handle == dd->handle)
 			return dd;
-		}
-	}
-	spin_unlock(&ds->dd_lock);
+
 	return NULL;
 }
 

@@ -1005,7 +997,6 @@ static int __init dock_add(acpi_handle handle)
 	dock_station->last_dock_time = jiffies - HZ;
 
 	mutex_init(&dock_station->hp_lock);
-	spin_lock_init(&dock_station->dd_lock);
 	INIT_LIST_HEAD(&dock_station->sibling);
 	INIT_LIST_HEAD(&dock_station->dependent_devices);
 

index a73571f..8c4214d 100644
@@ -100,7 +100,7 @@ struct dock_dependent_device {
  *
  * Add the dependent device to the dock's dependent device list.
  */
-static int
+static int __init
 add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 {
 	struct dock_dependent_device *dd;

@@ -244,7 +244,7 @@ static int is_dock(acpi_handle handle)
 	return 1;
 }
 
-static int is_ejectable(acpi_handle handle)
+static int __init is_ejectable(acpi_handle handle)
 {
 	acpi_status status;
 	acpi_handle tmp;

@@ -255,7 +255,7 @@ static int is_ejectable(acpi_handle handle)
 	return 1;
 }
 
-static int is_ata(acpi_handle handle)
+static int __init is_ata(acpi_handle handle)
 {
 	acpi_handle tmp;
 

@@ -268,7 +268,7 @@ static int is_ata(acpi_handle handle)
 	return 0;
 }
 
-static int is_battery(acpi_handle handle)
+static int __init is_battery(acpi_handle handle)
 {
 	struct acpi_device_info *info;
 	int ret = 1;

@@ -284,7 +284,7 @@ static int is_battery(acpi_handle handle)
 	return ret;
 }
 
-static int is_ejectable_bay(acpi_handle handle)
+static int __init is_ejectable_bay(acpi_handle handle)
 {
 	acpi_handle phandle;
 

@@ -848,7 +848,7 @@ static struct notifier_block dock_acpi_notifier = {
  * check to see if an object has an _EJD method.  If it does, then it
  * will see if it is dependent on the dock station.
  */
-static acpi_status
+static acpi_status __init
 find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
 	acpi_status status;

index 8c4214d..22183c4 100644
@@ -351,10 +351,8 @@ static int dock_present(struct dock_station *ds)
  *  handle if one does not exist already.  This should cause
  *  acpi to scan for drivers for the given devices, and call
  *  matching driver's add routine.
- *
- *  Returns a pointer to the acpi_device corresponding to the handle.
  */
-static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
+static void dock_create_acpi_device(acpi_handle handle)
 {
 	struct acpi_device *device;
 	int ret;

@@ -367,10 +365,7 @@ static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
 		ret = acpi_bus_scan(handle);
 		if (ret)
 			pr_debug("error adding bus, %x\n", -ret);
-
-		acpi_bus_get_device(handle, &device);
 	}
-	return device;
 }
 
 /**

index 74437130..5bcf068 100644
@@ -495,3 +495,75 @@ acpi_handle_printk(const char *level, acpi_handle handle, const char *fmt, ...)
 	kfree(buffer.pointer);
 }
 EXPORT_SYMBOL(acpi_handle_printk);
+
+static acpi_status
+acpi_evaluate_object_with_int_arg(acpi_handle handle, char *method, u64 val)
+{
+	union acpi_object arg;
+	struct acpi_object_list arg_list;
+
+	arg.type = ACPI_TYPE_INTEGER;
+	arg.integer.value = val;
+	arg_list.count = 1;
+	arg_list.pointer = &arg;
+
+	return acpi_evaluate_object(handle, method, &arg_list, NULL);
+}
+
+/**
+ * acpi_evaluate_ej0: Evaluate _EJ0 method for hotplug operations
+ * @handle: ACPI device handle
+ *
+ * Evaluate device's _EJ0 method for hotplug operations.
+ */
+acpi_status acpi_evaluate_ej0(acpi_handle handle)
+{
+	acpi_status status;
+
+	status = acpi_evaluate_object_with_int_arg(handle, "_EJ0", 1);
+	if (status == AE_NOT_FOUND)
+		acpi_handle_warn(handle, "No _EJ0 support for device\n");
+	else if (ACPI_FAILURE(status))
+		acpi_handle_warn(handle, "Eject failed (0x%x)\n", status);
+
+	return status;
+}
+
+/**
+ * acpi_evaluate_lck: Evaluate _LCK method to lock/unlock device
+ * @handle: ACPI device handle
+ * @lock: lock device if non-zero, otherwise unlock device
+ *
+ * Evaluate device's _LCK method if present to lock/unlock device
+ */
+acpi_status acpi_evaluate_lck(acpi_handle handle, int lock)
+{
+	acpi_status status;
+
+	status = acpi_evaluate_object_with_int_arg(handle, "_LCK", !!lock);
+	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+		if (lock)
+			acpi_handle_warn(handle,
+				"Locking device failed (0x%x)\n", status);
+		else
+			acpi_handle_warn(handle,
+				"Unlocking device failed (0x%x)\n", status);
+	}
+
+	return status;
+}
+
+/**
+ * acpi_has_method: Check whether @handle has a method named @name
+ * @handle: ACPI device handle
+ * @name: name of object or method
+ *
+ * Check whether @handle has a method named @name.
+ */
+bool acpi_has_method(acpi_handle handle, char *name)
+{
+	acpi_handle tmp;
+
+	return ACPI_SUCCESS(acpi_get_handle(handle, name, &tmp));
+}
+EXPORT_SYMBOL(acpi_has_method);

index ca081ac..3db3b97 100644
@@ -56,6 +56,11 @@ acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
 
 acpi_status
 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
+
+acpi_status acpi_evaluate_ej0(acpi_handle handle);
+acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
+bool acpi_has_method(acpi_handle handle, char *name);
+
 #ifdef CONFIG_ACPI
 
 #include <linux/proc_fs.h>

index dfe76f1..3ddba74 100644
@@ -1532,46 +1532,45 @@ static void acpi_device_get_busid(struct acpi_device *device)
 }
 
 /*
+ * acpi_ata_match - see if an acpi object is an ATA device
+ *
+ * If an acpi object has one of the ACPI ATA methods defined,
+ * then we can safely call it an ATA device.
+ */
+bool acpi_ata_match(acpi_handle handle)
+{
+	return acpi_has_method(handle, "_GTF") ||
+	       acpi_has_method(handle, "_GTM") ||
+	       acpi_has_method(handle, "_STM") ||
+	       acpi_has_method(handle, "_SDD");
+}
+
+/*
  * acpi_bay_match - see if an acpi object is an ejectable driver bay
  *
  * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
  * then we can safely call it an ejectable drive bay
  */
-static int acpi_bay_match(acpi_handle handle)
+bool acpi_bay_match(acpi_handle handle)
 {
-	acpi_status status;
-	acpi_handle tmp;
 	acpi_handle phandle;
 
-	status = acpi_get_handle(handle, "_EJ0", &tmp);
-	if (ACPI_FAILURE(status))
-		return -ENODEV;
-
-	if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
-		(ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
-		(ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
-		(ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
-		return 0;
-
-	if (acpi_get_parent(handle, &phandle))
-		return -ENODEV;
-
-        if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
-                (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
-                (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
-                (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
-                return 0;
+	if (!acpi_has_method(handle, "_EJ0"))
+		return false;
+	if (acpi_ata_match(handle))
+		return true;
+	if (ACPI_FAILURE(acpi_get_parent(handle, &phandle)))
+		return false;
 
-	return -ENODEV;
+	return acpi_ata_match(phandle);
 }
 
 /*
  * acpi_dock_match - see if an acpi object has a _DCK method
  */
-static int acpi_dock_match(acpi_handle handle)
+bool acpi_dock_match(acpi_handle handle)
 {
-	acpi_handle tmp;
-	return acpi_get_handle(handle, "_DCK", &tmp);
+	return acpi_has_method(handle, "_DCK");
 }
 
 const char *acpi_device_hid(struct acpi_device *device)

@@ -1609,34 +1608,27 @@ static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id)
  * lacks the SMBUS01 HID and the methods do not have the necessary "_"
  * prefix.  Work around this.
  */
-static int acpi_ibm_smbus_match(acpi_handle handle)
+static bool acpi_ibm_smbus_match(acpi_handle handle)
 {
 	acpi_handle h_dummy;
-	struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
-	int result;
+	char node_name[ACPI_PATH_SEGMENT_LENGTH];
+	struct acpi_buffer path = { sizeof(node_name), node_name };
 
 	if (!dmi_name_in_vendors("IBM"))
-		return -ENODEV;
+		return false;
 
 	/* Look for SMBS object */
-	result = acpi_get_name(handle, ACPI_SINGLE_NAME, &path);
-	if (result)
-		return result;
-
-	if (strcmp("SMBS", path.pointer)) {
-		result = -ENODEV;
-		goto out;
-	}
+	if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) ||
+	    strcmp("SMBS", path.pointer))
+		return false;
 
 	/* Does it have the necessary (but misnamed) methods? */
-	result = -ENODEV;
 	if (ACPI_SUCCESS(acpi_get_handle(handle, "SBI", &h_dummy)) &&
 	    ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) &&
 	    ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy)))
-		result = 0;
-out:
-	kfree(path.pointer);
-	return result;
+		return true;
+
+	return false;
 }
 
 static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,

@@ -1684,11 +1676,11 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
 		 */
 		if (acpi_is_video_device(handle))
 			acpi_add_id(pnp, ACPI_VIDEO_HID);
-		else if (ACPI_SUCCESS(acpi_bay_match(handle)))
+		else if (acpi_bay_match(handle))
 			acpi_add_id(pnp, ACPI_BAY_HID);
-		else if (ACPI_SUCCESS(acpi_dock_match(handle)))
+		else if (acpi_dock_match(handle))
 			acpi_add_id(pnp, ACPI_DOCK_HID);
-		else if (!acpi_ibm_smbus_match(handle))
+		else if (acpi_ibm_smbus_match(handle))
 			acpi_add_id(pnp, ACPI_SMBUS_IBM_HID);
 		else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) {
 			acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */

index 3db3b97..a4e4427 100644
@@ -60,6 +60,9 @@ acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld
 acpi_status acpi_evaluate_ej0(acpi_handle handle);
 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
 bool acpi_has_method(acpi_handle handle, char *name);
+bool acpi_ata_match(acpi_handle handle);
+bool acpi_bay_match(acpi_handle handle);
+bool acpi_dock_match(acpi_handle handle);
 
 #ifdef CONFIG_ACPI
 

index 22183c4..31ab001 100644
@@ -226,48 +226,6 @@ find_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
 /*****************************************************************************
  *                         Dock functions                                    *
  *****************************************************************************/
-/**
- * is_dock - see if a device is a dock station
- * @handle: acpi handle of the device
- *
- * If an acpi object has a _DCK method, then it is by definition a dock
- * station, so return true.
- */
-static int is_dock(acpi_handle handle)
-{
-	acpi_status status;
-	acpi_handle tmp;
-
-	status = acpi_get_handle(handle, "_DCK", &tmp);
-	if (ACPI_FAILURE(status))
-		return 0;
-	return 1;
-}
-
-static int __init is_ejectable(acpi_handle handle)
-{
-	acpi_status status;
-	acpi_handle tmp;
-
-	status = acpi_get_handle(handle, "_EJ0", &tmp);
-	if (ACPI_FAILURE(status))
-		return 0;
-	return 1;
-}
-
-static int __init is_ata(acpi_handle handle)
-{
-	acpi_handle tmp;
-
-	if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
-	   (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
-	   (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
-	   (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
-		return 1;
-
-	return 0;
-}
-
 static int __init is_battery(acpi_handle handle)
 {
 	struct acpi_device_info *info;

@@ -284,17 +242,13 @@ static int __init is_battery(acpi_handle handle)
 	return ret;
 }
 
-static int __init is_ejectable_bay(acpi_handle handle)
+/* Check whether ACPI object is an ejectable battery or disk bay */
+static bool __init is_ejectable_bay(acpi_handle handle)
 {
-	acpi_handle phandle;
+	if (acpi_has_method(handle, "_EJ0") && is_battery(handle))
+		return true;
 
-	if (!is_ejectable(handle))
-		return 0;
-	if (is_battery(handle) || is_ata(handle))
-		return 1;
-	if (!acpi_get_parent(handle, &phandle) && is_ata(phandle))
-		return 1;
-	return 0;
+	return acpi_bay_match(handle);
 }
 
 /**

@@ -312,7 +266,7 @@ int is_dock_device(acpi_handle handle)
 	if (!dock_station_count)
 		return 0;
 
-	if (is_dock(handle))
+	if (acpi_dock_match(handle))
 		return 1;
 
 	list_for_each_entry(dock_station, &dock_stations, sibling)

@@ -447,37 +401,6 @@ static void dock_event(struct dock_station *ds, u32 event, int num)
 }
 
 /**
- * eject_dock - respond to a dock eject request
- * @ds: the dock station
- *
- * This is called after _DCK is called, to execute the dock station's
- * _EJ0 method.
- */
-static void eject_dock(struct dock_station *ds)
-{
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
-	acpi_status status;
-	acpi_handle tmp;
-
-	/* all dock devices should have _EJ0, but check anyway */
-	status = acpi_get_handle(ds->handle, "_EJ0", &tmp);
-	if (ACPI_FAILURE(status)) {
-		pr_debug("No _EJ0 support for dock device\n");
-		return;
-	}
-
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = 1;
-
-	status = acpi_evaluate_object(ds->handle, "_EJ0", &arg_list, NULL);
-	if (ACPI_FAILURE(status))
-		pr_debug("Failed to evaluate _EJ0!\n");
-}
-
-/**
  * handle_dock - handle a dock event
  * @ds: the dock station
  * @dock: to dock, or undock - that is the question

@@ -537,27 +460,6 @@ static inline void complete_undock(struct dock_station *ds)
 	ds->flags &= ~(DOCK_UNDOCKING);
 }
 
-static void dock_lock(struct dock_station *ds, int lock)
-{
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
-	acpi_status status;
-
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = !!lock;
-	status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL);
-	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-		if (lock)
-			acpi_handle_warn(ds->handle,
-				"Locking device failed (0x%x)\n", status);
-		else
-			acpi_handle_warn(ds->handle,
-				"Unlocking device failed (0x%x)\n", status);
-	}
-}
-
 /**
  * dock_in_progress - see if we are in the middle of handling a dock event
  * @ds: the dock station

@@ -692,8 +594,8 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
 
 	hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST);
 	undock(ds);
-	dock_lock(ds, 0);
-	eject_dock(ds);
+	acpi_evaluate_lck(ds->handle, 0);
+	acpi_evaluate_ej0(ds->handle);
 	if (dock_present(ds)) {
 		acpi_handle_err(ds->handle, "Unable to undock!\n");
 		return -EBUSY;

@@ -752,7 +654,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data)
 			hotplug_dock_devices(ds, event);
 			complete_dock(ds);
 			dock_event(ds, event, DOCK_EVENT);
-			dock_lock(ds, 1);
+			acpi_evaluate_lck(ds->handle, 1);
 			acpi_update_all_gpes();
 			break;
 		}

@@ -998,9 +900,9 @@ static int __init dock_add(acpi_handle handle)
 	/* we want the dock device to send uevents */
 	dev_set_uevent_suppress(&dd->dev, 0);
 
-	if (is_dock(handle))
+	if (acpi_dock_match(handle))
 		dock_station->flags |= DOCK_IS_DOCK;
-	if (is_ata(handle))
+	if (acpi_ata_match(handle))
 		dock_station->flags |= DOCK_IS_ATA;
 	if (is_battery(handle))
 		dock_station->flags |= DOCK_IS_BAT;

@@ -1043,7 +945,7 @@ err_unregister:
 static __init acpi_status
 find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-	if (is_dock(handle) || is_ejectable_bay(handle))
+	if (acpi_dock_match(handle) || is_ejectable_bay(handle))
 		dock_add(handle);
 
 	return AE_OK;

index 3ddba74..d228926 100644
@@ -194,9 +194,6 @@ static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl,
 static int acpi_scan_hot_remove(struct acpi_device *device)
 {
 	acpi_handle handle = device->handle;
-	acpi_handle not_used;
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
 	struct device *errdev;
 	acpi_status status;
 	unsigned long long sta;

@@ -259,32 +256,15 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
 	put_device(&device->dev);
 	device = NULL;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &not_used))) {
-		arg_list.count = 1;
-		arg_list.pointer = &arg;
-		arg.type = ACPI_TYPE_INTEGER;
-		arg.integer.value = 0;
-		acpi_evaluate_object(handle, "_LCK", &arg_list, NULL);
-	}
-
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = 1;
-
+	acpi_evaluate_lck(handle, 0);
 	/*
 	 * TBD: _EJD support.
 	 */
-	status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
-	if (ACPI_FAILURE(status)) {
-		if (status == AE_NOT_FOUND) {
-			return -ENODEV;
-		} else {
-			acpi_handle_warn(handle, "Eject failed (0x%x)\n",
-								status);
-			return -EIO;
-		}
-	}
+	status = acpi_evaluate_ej0(handle);
+	if (status == AE_NOT_FOUND)
+		return -ENODEV;
+	else if (ACPI_FAILURE(status))
+		return -EIO;
 
 	/*
 	 * Verify if eject was indeed successful.  If not, log an error

@@ -653,7 +633,6 @@ static int acpi_device_setup_files(struct acpi_device *dev)
 {
 	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 	acpi_status status;
-	acpi_handle temp;
 	unsigned long long sun;
 	int result = 0;
 

@@ -679,8 +658,7 @@ static int acpi_device_setup_files(struct acpi_device *dev)
 	/*
 	 * If device has _STR, 'description' file is created
 	 */
-	status = acpi_get_handle(dev->handle, "_STR", &temp);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_has_method(dev->handle, "_STR")) {
 		status = acpi_evaluate_object(dev->handle, "_STR",
 					NULL, &buffer);
 		if (ACPI_FAILURE(status))

@@ -710,8 +688,7 @@ static int acpi_device_setup_files(struct acpi_device *dev)
          * If device has _EJ0, 'eject' file is created that is used to trigger
          * hot-removal function from userland.
          */
-	status = acpi_get_handle(dev->handle, "_EJ0", &temp);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_has_method(dev->handle, "_EJ0")) {
 		result = device_create_file(&dev->dev, &dev_attr_eject);
 		if (result)
 			return result;

@@ -733,9 +710,6 @@ end:
 
 static void acpi_device_remove_files(struct acpi_device *dev)
 {
-	acpi_status status;
-	acpi_handle temp;
-
 	if (dev->flags.power_manageable) {
 		device_remove_file(&dev->dev, &dev_attr_power_state);
 		if (dev->power.flags.power_resources)

@@ -746,20 +720,17 @@ static void acpi_device_remove_files(struct acpi_device *dev)
 	/*
 	 * If device has _STR, remove 'description' file
 	 */
-	status = acpi_get_handle(dev->handle, "_STR", &temp);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_has_method(dev->handle, "_STR")) {
 		kfree(dev->pnp.str_obj);
 		device_remove_file(&dev->dev, &dev_attr_description);
 	}
 	/*
 	 * If device has _EJ0, remove 'eject' file.
 	 */
-	status = acpi_get_handle(dev->handle, "_EJ0", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(dev->handle, "_EJ0"))
 		device_remove_file(&dev->dev, &dev_attr_eject);
 
-	status = acpi_get_handle(dev->handle, "_SUN", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(dev->handle, "_SUN"))
 		device_remove_file(&dev->dev, &dev_attr_sun);
 
 	if (dev->pnp.unique_id)

@@ -1335,13 +1306,10 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
 
 static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
 {
-	acpi_handle temp;
-	acpi_status status = 0;
 	int err;
 
 	/* Presence of _PRW indicates wake capable */
-	status = acpi_get_handle(device->handle, "_PRW", &temp);
-	if (ACPI_FAILURE(status))
+	if (!acpi_has_method(device->handle, "_PRW"))
 		return;
 
 	err = acpi_bus_extract_wakeup_device_power_package(device->handle,

@@ -1371,7 +1339,6 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
 	struct acpi_device_power_state *ps = &device->power.states[state];
 	char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' };
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-	acpi_handle handle;
 	acpi_status status;
 
 	INIT_LIST_HEAD(&ps->resources);

@@ -1394,8 +1361,7 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
 
 	/* Evaluate "_PSx" to see if we can do explicit sets */
 	pathname[2] = 'S';
-	status = acpi_get_handle(device->handle, pathname, &handle);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, pathname))
 		ps->flags.explicit_set = 1;
 
 	/*

@@ -1414,28 +1380,21 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
 
 static void acpi_bus_get_power_flags(struct acpi_device *device)
 {
-	acpi_status status;
-	acpi_handle handle;
 	u32 i;
 
 	/* Presence of _PS0|_PR0 indicates 'power manageable' */
-	status = acpi_get_handle(device->handle, "_PS0", &handle);
-	if (ACPI_FAILURE(status)) {
-		status = acpi_get_handle(device->handle, "_PR0", &handle);
-		if (ACPI_FAILURE(status))
-			return;
-	}
+	if (!acpi_has_method(device->handle, "_PS0") &&
+	    !acpi_has_method(device->handle, "_PR0"))
+		return;
 
 	device->flags.power_manageable = 1;
 
 	/*
 	 * Power Management Flags
 	 */
-	status = acpi_get_handle(device->handle, "_PSC", &handle);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_PSC"))
 		device->power.flags.explicit_get = 1;
-	status = acpi_get_handle(device->handle, "_IRC", &handle);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_IRC"))
 		device->power.flags.inrush_current = 1;
 
 	/*

@@ -1469,28 +1428,18 @@ static void acpi_bus_get_power_flags(struct acpi_device *device)
 
 static void acpi_bus_get_flags(struct acpi_device *device)
 {
-	acpi_status status = AE_OK;
-	acpi_handle temp = NULL;
-
 	/* Presence of _STA indicates 'dynamic_status' */
-	status = acpi_get_handle(device->handle, "_STA", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_STA"))
 		device->flags.dynamic_status = 1;
 
 	/* Presence of _RMV indicates 'removable' */
-	status = acpi_get_handle(device->handle, "_RMV", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_RMV"))
 		device->flags.removable = 1;
 
 	/* Presence of _EJD|_EJ0 indicates 'ejectable' */
-	status = acpi_get_handle(device->handle, "_EJD", &temp);
-	if (ACPI_SUCCESS(status))
+	if (acpi_has_method(device->handle, "_EJD") ||
+	    acpi_has_method(device->handle, "_EJ0"))
 		device->flags.ejectable = 1;
-	else {
-		status = acpi_get_handle(device->handle, "_EJ0", &temp);
-		if (ACPI_SUCCESS(status))
-			device->flags.ejectable = 1;
-	}
 }
 
 static void acpi_device_get_busid(struct acpi_device *device)

@@ -1891,7 +1840,6 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
 	struct acpi_device *device = NULL;
 	int type;
 	unsigned long long sta;
-	acpi_status status;
 	int result;
 
 	acpi_bus_get_device(handle, &device);

@@ -1912,10 +1860,8 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
 	if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
 	    !(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
 		struct acpi_device_wakeup wakeup;
-		acpi_handle temp;
 
-		status = acpi_get_handle(handle, "_PRW", &temp);
-		if (ACPI_SUCCESS(status)) {
+		if (acpi_has_method(handle, "_PRW")) {
 			acpi_bus_extract_wakeup_device_power_package(handle,
 								     &wakeup);
 			acpi_power_resources_list_free(&wakeup.resources);

index 59df857..a0a7133 100644
@@ -201,7 +201,6 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 	struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context;
 	struct acpiphp_slot *slot;
 	struct acpiphp_func *newfunc;
-	acpi_handle tmp;
 	acpi_status status = AE_OK;
 	unsigned long long adr, sun;
 	int device, function, retval, found = 0;

@@ -232,19 +231,19 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 	newfunc->handle = handle;
 	newfunc->function = function;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
+	if (acpi_has_method(handle, "_EJ0"))
 		newfunc->flags = FUNC_HAS_EJ0;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp)))
+	if (acpi_has_method(handle, "_STA"))
 		newfunc->flags |= FUNC_HAS_STA;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp)))
+	if (acpi_has_method(handle, "_PS0"))
 		newfunc->flags |= FUNC_HAS_PS0;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp)))
+	if (acpi_has_method(handle, "_PS3"))
 		newfunc->flags |= FUNC_HAS_PS3;
 
-	if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp)))
+	if (acpi_has_method(handle, "_DCK"))
 		newfunc->flags |= FUNC_HAS_DCK;
 
 	status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun);

@@ -843,25 +842,14 @@ static unsigned int get_slot_status(struct acpiphp_slot *slot)
  */
 int acpiphp_eject_slot(struct acpiphp_slot *slot)
 {
-	acpi_status status;
 	struct acpiphp_func *func;
-	struct acpi_object_list arg_list;
-	union acpi_object arg;
 
 	list_for_each_entry(func, &slot->funcs, sibling) {
 		/* We don't want to call _EJ0 on non-existing functions. */
 		if ((func->flags & FUNC_HAS_EJ0)) {
-			/* _EJ0 method take one argument */
-			arg_list.count = 1;
-			arg_list.pointer = &arg;
-			arg.type = ACPI_TYPE_INTEGER;
-			arg.integer.value = 1;
-
-			status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL);
-			if (ACPI_FAILURE(status)) {
-				warn("%s: _EJ0 failed\n", __func__);
+			if (ACPI_FAILURE(acpi_evaluate_ej0(func->handle)))
 				return -1;
-			} else
+			else
 				break;
 		}
 	}

@@ -1171,7 +1159,6 @@ static void handle_hotplug_event_func(acpi_handle handle, u32 type,
  */
 void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle)
 {
-	acpi_handle dummy_handle;
 	struct acpiphp_bridge *bridge;
 
 	if (acpiphp_disabled)

@@ -1200,8 +1187,7 @@ void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle)
 	get_device(&bus->dev);
 
 	if (!pci_is_root_bus(bridge->pci_bus) &&
-	    ACPI_SUCCESS(acpi_get_handle(bridge->handle,
-					"_EJ0", &dummy_handle))) {
+	    acpi_has_method(bridge->handle, "_EJ0")) {
 		dbg("found ejectable p2p bridge\n");
 		bridge->flags |= BRIDGE_HAS_EJ0;
 		bridge->func = acpiphp_bridge_handle_to_function(handle);