Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (26 commits)
  cpuidle: remove unused exports
  acpi: remove double mention of Support for ACPI option
  ACPI: use select POWER_SUPPLY for AC, BATTERY and SBS
  ACPI: Battery: Allow extract string from integer
  ACPI: battery: Support for non-spec name for LiIon technology
  ACPI: battery: register power_supply subdevice only when battery is present
  suspend: MAINTAINERS update
  ACPI: update MAINTAINERS
  fujitsu-laptop.c: remove dead code
  cpuidle: unexport tick_nohz_get_sleep_length
  ACPI: battery: Update battery information upon sysfs read.
  fujitsu-laptop: make 2 functions static
  ACPI: EC: fix use-after-free
  ACPI: battery: remove dead code
  ACPI: Fan: Drop force_power_state acpi_device option
  ACPI: Fan: fan device does not need own structure
  ACPI: power: don't cache power resource state
  ACPI: EC: Output changes to operational mode
  ACPI: EC: Add workaround for "optimized" controllers
  ACPI: EC: Don't re-enable GPE for each transaction.
  ...

11 files changed, 239 insertions, 277 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 5d0e26a5c34c..da3a08fa9e4f 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -3,7 +3,7 @@
 #
 
 menuconfig ACPI
-	bool "ACPI Support (Advanced Configuration and Power Interface) Support"
+	bool "ACPI (Advanced Configuration and Power Interface) Support"
 	depends on !X86_NUMAQ
 	depends on !X86_VISWS
 	depends on !IA64_HP_SIM
@@ -88,7 +88,8 @@ config ACPI_PROC_EVENT
 
 config ACPI_AC
 	tristate "AC Adapter"
-	depends on X86 && POWER_SUPPLY
+	depends on X86
+	select POWER_SUPPLY
 	default y
 	help
 	  This driver adds support for the AC Adapter object, which indicates
@@ -97,7 +98,8 @@ config ACPI_AC
 
 config ACPI_BATTERY
 	tristate "Battery"
-	depends on X86 && POWER_SUPPLY
+	depends on X86
+	select POWER_SUPPLY
 	default y
 	help
 	  This driver adds support for battery information through
@@ -352,7 +354,7 @@ config ACPI_HOTPLUG_MEMORY
 config ACPI_SBS
 	tristate "Smart Battery System"
 	depends on X86
-	depends on POWER_SUPPLY
+	select POWER_SUPPLY
 	help
 	  This driver adds support for the Smart Battery System, another
 	  type of access to battery information, found on some laptops.
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 681e26b56b11..c2ce0ad21693 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -125,11 +125,15 @@ static int acpi_battery_technology(struct acpi_battery *battery)
 		return POWER_SUPPLY_TECHNOLOGY_NiMH;
 	if (!strcasecmp("LION", battery->type))
 		return POWER_SUPPLY_TECHNOLOGY_LION;
+	if (!strcasecmp("LI-ION", battery->type))
+		return POWER_SUPPLY_TECHNOLOGY_LION;
 	if (!strcasecmp("LiP", battery->type))
 		return POWER_SUPPLY_TECHNOLOGY_LIPO;
 	return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
 }
 
+static int acpi_battery_update(struct acpi_battery *battery);
+
 static int acpi_battery_get_property(struct power_supply *psy,
 				     enum power_supply_property psp,
 				     union power_supply_propval *val)
@@ -139,6 +143,7 @@ static int acpi_battery_get_property(struct power_supply *psy,
 	if ((!acpi_battery_present(battery)) &&
 	     psp != POWER_SUPPLY_PROP_PRESENT)
 		return -ENODEV;
+	acpi_battery_update(battery);
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
 		if (battery->state & 0x01)
@@ -257,7 +262,7 @@ static int extract_package(struct acpi_battery *battery,
 			   union acpi_object *package,
 			   struct acpi_offsets *offsets, int num)
 {
-	int i, *x;
+	int i;
 	union acpi_object *element;
 	if (package->type != ACPI_TYPE_PACKAGE)
 		return -EFAULT;
@@ -266,16 +271,21 @@ static int extract_package(struct acpi_battery *battery,
 			return -EFAULT;
 		element = &package->package.elements[i];
 		if (offsets[i].mode) {
-			if (element->type != ACPI_TYPE_STRING &&
-			    element->type != ACPI_TYPE_BUFFER)
-				return -EFAULT;
-			strncpy((u8 *)battery + offsets[i].offset,
-				element->string.pointer, 32);
+			u8 *ptr = (u8 *)battery + offsets[i].offset;
+			if (element->type == ACPI_TYPE_STRING ||
+			    element->type == ACPI_TYPE_BUFFER)
+				strncpy(ptr, element->string.pointer, 32);
+			else if (element->type == ACPI_TYPE_INTEGER) {
+				strncpy(ptr, (u8 *)&element->integer.value,
+					sizeof(acpi_integer));
+				ptr[sizeof(acpi_integer)] = 0;
+			} else return -EFAULT;
 		} else {
-			if (element->type != ACPI_TYPE_INTEGER)
-				return -EFAULT;
-			x = (int *)((u8 *)battery + offsets[i].offset);
-			*x = element->integer.value;
+			if (element->type == ACPI_TYPE_INTEGER) {
+				int *x = (int *)((u8 *)battery +
+						offsets[i].offset);
+				*x = element->integer.value;
+			} else return -EFAULT;
 		}
 	}
 	return 0;
@@ -385,29 +395,81 @@ static int acpi_battery_init_alarm(struct acpi_battery *battery)
 	return acpi_battery_set_alarm(battery);
 }
 
+static ssize_t acpi_battery_alarm_show(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
+	return sprintf(buf, "%d\n", battery->alarm * 1000);
+}
+
+static ssize_t acpi_battery_alarm_store(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	unsigned long x;
+	struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
+	if (sscanf(buf, "%ld\n", &x) == 1)
+		battery->alarm = x/1000;
+	if (acpi_battery_present(battery))
+		acpi_battery_set_alarm(battery);
+	return count;
+}
+
+static struct device_attribute alarm_attr = {
+	.attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
+	.show = acpi_battery_alarm_show,
+	.store = acpi_battery_alarm_store,
+};
+
+static int sysfs_add_battery(struct acpi_battery *battery)
+{
+	int result;
+
+	battery->update_time = 0;
+	result = acpi_battery_get_info(battery);
+	acpi_battery_init_alarm(battery);
+	if (result)
+		return result;
+	if (battery->power_unit) {
+		battery->bat.properties = charge_battery_props;
+		battery->bat.num_properties =
+			ARRAY_SIZE(charge_battery_props);
+	} else {
+		battery->bat.properties = energy_battery_props;
+		battery->bat.num_properties =
+			ARRAY_SIZE(energy_battery_props);
+	}
+
+	battery->bat.name = acpi_device_bid(battery->device);
+	battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
+	battery->bat.get_property = acpi_battery_get_property;
+
+	result = power_supply_register(&battery->device->dev, &battery->bat);
+	if (result)
+		return result;
+	return device_create_file(battery->bat.dev, &alarm_attr);
+}
+
+static void sysfs_remove_battery(struct acpi_battery *battery)
+{
+	if (!battery->bat.dev)
+		return;
+	device_remove_file(battery->bat.dev, &alarm_attr);
+	power_supply_unregister(&battery->bat);
+}
+
 static int acpi_battery_update(struct acpi_battery *battery)
 {
-	int saved_present = acpi_battery_present(battery);
 	int result = acpi_battery_get_status(battery);
-	if (result || !acpi_battery_present(battery))
+	if (result)
 		return result;
-	if (saved_present != acpi_battery_present(battery) ||
-	    !battery->update_time) {
-		battery->update_time = 0;
-		result = acpi_battery_get_info(battery);
-		if (result)
-			return result;
-		if (battery->power_unit) {
-			battery->bat.properties = charge_battery_props;
-			battery->bat.num_properties =
-				ARRAY_SIZE(charge_battery_props);
-		} else {
-			battery->bat.properties = energy_battery_props;
-			battery->bat.num_properties =
-				ARRAY_SIZE(energy_battery_props);
-		}
-		acpi_battery_init_alarm(battery);
+	if (!acpi_battery_present(battery)) {
+		sysfs_remove_battery(battery);
+		return 0;
 	}
+	if (!battery->bat.dev)
+		sysfs_add_battery(battery);
 	return acpi_battery_get_state(battery);
 }
 
@@ -554,10 +616,6 @@ static ssize_t acpi_battery_write_alarm(struct file *file,
 
 	if (!battery || (count > sizeof(alarm_string) - 1))
 		return -EINVAL;
-	if (result) {
-		result = -ENODEV;
-		goto end;
-	}
 	if (!acpi_battery_present(battery)) {
 		result = -ENODEV;
 		goto end;
@@ -688,33 +746,6 @@ static void acpi_battery_remove_fs(struct acpi_device *device)
 
 #endif
 
-static ssize_t acpi_battery_alarm_show(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
-	return sprintf(buf, "%d\n", battery->alarm * 1000);
-}
-
-static ssize_t acpi_battery_alarm_store(struct device *dev,
-					struct device_attribute *attr,
-					const char *buf, size_t count)
-{
-	unsigned long x;
-	struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
-	if (sscanf(buf, "%ld\n", &x) == 1)
-		battery->alarm = x/1000;
-	if (acpi_battery_present(battery))
-		acpi_battery_set_alarm(battery);
-	return count;
-}
-
-static struct device_attribute alarm_attr = {
-	.attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
-	.show = acpi_battery_alarm_show,
-	.store = acpi_battery_alarm_store,
-};
-
 /* --------------------------------------------------------------------------
                                  Driver Interface
    -------------------------------------------------------------------------- */
@@ -732,7 +763,9 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
 	acpi_bus_generate_netlink_event(device->pnp.device_class,
 					device->dev.bus_id, event,
 					acpi_battery_present(battery));
-	kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
+	/* acpi_batter_update could remove power_supply object */
+	if (battery->bat.dev)
+		kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
 }
 
 static int acpi_battery_add(struct acpi_device *device)
@@ -756,11 +789,6 @@ static int acpi_battery_add(struct acpi_device *device)
 	if (result)
 		goto end;
 #endif
-	battery->bat.name = acpi_device_bid(device);
-	battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
-	battery->bat.get_property = acpi_battery_get_property;
-	result = power_supply_register(&battery->device->dev, &battery->bat);
-	result = device_create_file(battery->bat.dev, &alarm_attr);
 	status = acpi_install_notify_handler(device->handle,
 					     ACPI_ALL_NOTIFY,
 					     acpi_battery_notify, battery);
@@ -796,10 +824,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
 #ifdef CONFIG_ACPI_PROCFS
 	acpi_battery_remove_fs(device);
 #endif
-	if (battery->bat.dev) {
-		device_remove_file(battery->bat.dev, &alarm_attr);
-		power_supply_unregister(&battery->bat);
-	}
+	sysfs_remove_battery(battery);
 	mutex_destroy(&battery->lock);
 	kfree(battery);
 	return 0;
@@ -813,6 +838,7 @@ static int acpi_battery_resume(struct acpi_device *device)
 		return -EINVAL;
 	battery = acpi_driver_data(device);
 	battery->update_time = 0;
+	acpi_battery_update(battery);
 	return 0;
 }
 
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index fb2cff9a2d24..49d432d0a12c 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -198,12 +198,10 @@ int acpi_bus_set_power(acpi_handle handle, int state)
 		return -ENODEV;
 	}
 	/*
-	 * Get device's current power state if it's unknown
-	 * This means device power state isn't initialized or previous setting failed
+	 * Get device's current power state
 	 */
-	if ((device->power.state == ACPI_STATE_UNKNOWN) || device->flags.force_power_state)
-		acpi_bus_get_power(device->handle, &device->power.state);
-	if ((state == device->power.state) && !device->flags.force_power_state) {
+	acpi_bus_get_power(device->handle, &device->power.state);
+	if (state == device->power.state) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
 				  state));
 		return 0;
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 301e832e6961..24a7865a57cb 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -78,6 +78,7 @@ MODULE_DEVICE_TABLE(acpi, button_device_ids);
 
 static int acpi_button_add(struct acpi_device *device);
 static int acpi_button_remove(struct acpi_device *device, int type);
+static int acpi_button_resume(struct acpi_device *device);
 static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
 static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
 
@@ -87,6 +88,7 @@ static struct acpi_driver acpi_button_driver = {
 	.ids = button_device_ids,
 	.ops = {
 		.add = acpi_button_add,
+		.resume = acpi_button_resume,
 		.remove = acpi_button_remove,
 	},
 };
@@ -253,6 +255,19 @@ static int acpi_button_remove_fs(struct acpi_device *device)
 /* --------------------------------------------------------------------------
                                 Driver Interface
    -------------------------------------------------------------------------- */
+static int acpi_lid_send_state(struct acpi_button *button)
+{
+	unsigned long state;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(button->device->handle, "_LID", NULL,
+					&state);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+	/* input layer checks if event is redundant */
+	input_report_switch(button->input, SW_LID, !state);
+	return 0;
+}
 
 static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
 {
@@ -265,15 +280,8 @@ static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
 	switch (event) {
 	case ACPI_BUTTON_NOTIFY_STATUS:
 		input = button->input;
-
 		if (button->type == ACPI_BUTTON_TYPE_LID) {
-			struct acpi_handle *handle = button->device->handle;
-			unsigned long state;
-
-			if (!ACPI_FAILURE(acpi_evaluate_integer(handle, "_LID",
-								NULL, &state)))
-				input_report_switch(input, SW_LID, !state);
-
+			acpi_lid_send_state(button);
 		} else {
 			int keycode = test_bit(KEY_SLEEP, input->keybit) ?
 						KEY_SLEEP : KEY_POWER;
@@ -336,6 +344,17 @@ static int acpi_button_install_notify_handlers(struct acpi_button *button)
 	return ACPI_FAILURE(status) ? -ENODEV : 0;
 }
 
+static int acpi_button_resume(struct acpi_device *device)
+{
+	struct acpi_button *button;
+	if (!device)
+		return -EINVAL;
+	button = acpi_driver_data(device);
+	if (button && button->type == ACPI_BUTTON_TYPE_LID)
+		return acpi_lid_send_state(button);
+	return 0;
+}
+
 static void acpi_button_remove_notify_handlers(struct acpi_button *button)
 {
 	switch (button->type) {
@@ -453,6 +472,8 @@ static int acpi_button_add(struct acpi_device *device)
 	error = input_register_device(input);
 	if (error)
 		goto err_remove_handlers;
+	if (button->type == ACPI_BUTTON_TYPE_LID)
+		acpi_lid_send_state(button);
 
 	if (device->wakeup.flags.valid) {
 		/* Button's GPE is run-wake GPE */
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 7b4178393e34..06b78e5e33a1 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -65,16 +65,18 @@ enum ec_command {
 /* EC events */
 enum ec_event {
 	ACPI_EC_EVENT_OBF_1 = 1,	/* Output buffer full */
-	ACPI_EC_EVENT_IBF_0,	/* Input buffer empty */
+	ACPI_EC_EVENT_IBF_0,		/* Input buffer empty */
 };
 
 #define ACPI_EC_DELAY		500	/* Wait 500ms max. during EC ops */
 #define ACPI_EC_UDELAY_GLK	1000	/* Wait 1ms max. to get global lock */
 
-static enum ec_mode {
-	EC_INTR = 1,		/* Output buffer full */
-	EC_POLL,		/* Input buffer empty */
-} acpi_ec_mode = EC_INTR;
+enum {
+	EC_FLAGS_WAIT_GPE = 0,		/* Don't check status until GPE arrives */
+	EC_FLAGS_QUERY_PENDING,		/* Query is pending */
+	EC_FLAGS_GPE_MODE,		/* Expect GPE to be sent for status change */
+	EC_FLAGS_ONLY_IBF_GPE,		/* Expect GPE only for IBF = 0 event */
+};
 
 static int acpi_ec_remove(struct acpi_device *device, int type);
 static int acpi_ec_start(struct acpi_device *device);
@@ -116,9 +118,8 @@ static struct acpi_ec {
 	unsigned long command_addr;
 	unsigned long data_addr;
 	unsigned long global_lock;
+	unsigned long flags;
 	struct mutex lock;
-	atomic_t query_pending;
-	atomic_t event_count;
 	wait_queue_head_t wait;
 	struct list_head list;
 	u8 handlers_installed;
@@ -148,45 +149,54 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
 	outb(data, ec->data_addr);
 }
 
-static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event,
-				       unsigned old_count)
+static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
 {
-	u8 status = acpi_ec_read_status(ec);
-	if (old_count == atomic_read(&ec->event_count))
+	if (test_bit(EC_FLAGS_WAIT_GPE, &ec->flags))
 		return 0;
 	if (event == ACPI_EC_EVENT_OBF_1) {
-		if (status & ACPI_EC_FLAG_OBF)
+		if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF)
 			return 1;
 	} else if (event == ACPI_EC_EVENT_IBF_0) {
-		if (!(status & ACPI_EC_FLAG_IBF))
+		if (!(acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF))
 			return 1;
 	}
 
 	return 0;
 }
 
-static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event,
-                        unsigned count, int force_poll)
+static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
 {
-	if (unlikely(force_poll) || acpi_ec_mode == EC_POLL) {
+	if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) &&
+	    likely(!force_poll)) {
+		if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event),
+				       msecs_to_jiffies(ACPI_EC_DELAY)))
+			return 0;
+		clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
+		if (acpi_ec_check_status(ec, event)) {
+			if (event == ACPI_EC_EVENT_OBF_1) {
+				/* miss OBF = 1 GPE, don't expect it anymore */
+				printk(KERN_INFO PREFIX "missing OBF_1 confirmation,"
+					"switching to degraded mode.\n");
+				set_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags);
+			} else {
+				/* missing GPEs, switch back to poll mode */
+				printk(KERN_INFO PREFIX "missing IBF_1 confirmations,"
+					"switch off interrupt mode.\n");
+				clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
+			}
+			return 0;
+		}
+	} else {
 		unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
+		clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
 		while (time_before(jiffies, delay)) {
-			if (acpi_ec_check_status(ec, event, 0))
+			if (acpi_ec_check_status(ec, event))
 				return 0;
 		}
-	} else {
-		if (wait_event_timeout(ec->wait,
-				       acpi_ec_check_status(ec, event, count),
-				       msecs_to_jiffies(ACPI_EC_DELAY)) ||
-		    acpi_ec_check_status(ec, event, 0)) {
-			return 0;
-		} else {
-			printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
+	}
+	printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
 			       " status = %d, expect_event = %d\n",
 			       acpi_ec_read_status(ec), event);
-		}
-	}
-
 	return -ETIME;
 }
 
@@ -196,39 +206,42 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
 					int force_poll)
 {
 	int result = 0;
-	unsigned count = atomic_read(&ec->event_count);
+	set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
 	acpi_ec_write_cmd(ec, command);
 
 	for (; wdata_len > 0; --wdata_len) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll);
 		if (result) {
 			printk(KERN_ERR PREFIX
 			       "write_cmd timeout, command = %d\n", command);
 			goto end;
 		}
-		count = atomic_read(&ec->event_count);
+		set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
 		acpi_ec_write_data(ec, *(wdata++));
 	}
 
 	if (!rdata_len) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll);
 		if (result) {
 			printk(KERN_ERR PREFIX
 			       "finish-write timeout, command = %d\n", command);
 			goto end;
 		}
-	} else if (command == ACPI_EC_COMMAND_QUERY) {
-		atomic_set(&ec->query_pending, 0);
-	}
+	} else if (command == ACPI_EC_COMMAND_QUERY)
+		clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
 
 	for (; rdata_len > 0; --rdata_len) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count, force_poll);
+		if (test_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags))
+			force_poll = 1;
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll);
 		if (result) {
 			printk(KERN_ERR PREFIX "read timeout, command = %d\n",
 			       command);
 			goto end;
 		}
-		count = atomic_read(&ec->event_count);
+		/* Don't expect GPE after last read */
+		if (rdata_len > 1)
+			set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
 		*(rdata++) = acpi_ec_read_data(ec);
 	}
       end:
@@ -258,10 +271,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
 		}
 	}
 
-	/* Make sure GPE is enabled before doing transaction */
-	acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
-
-	status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0, 0);
+	status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0);
 	if (status) {
 		printk(KERN_ERR PREFIX
 		       "input buffer is not empty, aborting transaction\n");
@@ -435,9 +445,9 @@ EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler);
 
 void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
 {
-	struct acpi_ec_query_handler *handler;
+	struct acpi_ec_query_handler *handler, *tmp;
 	mutex_lock(&ec->lock);
-	list_for_each_entry(handler, &ec->list, node) {
+	list_for_each_entry_safe(handler, tmp, &ec->list, node) {
 		if (query_bit == handler->query_bit) {
 			list_del(&handler->node);
 			kfree(handler);
@@ -476,23 +486,24 @@ static void acpi_ec_gpe_query(void *ec_cxt)
 static u32 acpi_ec_gpe_handler(void *data)
 {
 	acpi_status status = AE_OK;
-	u8 value;
 	struct acpi_ec *ec = data;
 
-	atomic_inc(&ec->event_count);
-
-	if (acpi_ec_mode == EC_INTR) {
+	clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
+	if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))
 		wake_up(&ec->wait);
-	}
 
-	value = acpi_ec_read_status(ec);
-	if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) {
-		atomic_set(&ec->query_pending, 1);
-		status =
-		    acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
+	if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) {
+		if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
+			status = acpi_os_execute(OSL_EC_BURST_HANDLER,
+				acpi_ec_gpe_query, ec);
+	} else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) {
+		/* this is non-query, must be confirmation */
+		printk(KERN_INFO PREFIX "non-query interrupt received,"
+			" switching to interrupt mode\n");
+		set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
 	}
 
-	return status == AE_OK ?
+	return ACPI_SUCCESS(status) ?
 	    ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
 }
 
@@ -641,13 +652,10 @@ static struct acpi_ec *make_acpi_ec(void)
 	struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
 	if (!ec)
 		return NULL;
-
-	atomic_set(&ec->query_pending, 1);
-	atomic_set(&ec->event_count, 1);
+	ec->flags = 1 << EC_FLAGS_QUERY_PENDING;
 	mutex_init(&ec->lock);
 	init_waitqueue_head(&ec->wait);
 	INIT_LIST_HEAD(&ec->list);
-
 	return ec;
 }
 
@@ -741,6 +749,8 @@ static int acpi_ec_add(struct acpi_device *device)
 	acpi_ec_add_fs(device);
 	printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
 			  ec->gpe, ec->command_addr, ec->data_addr);
+	printk(KERN_INFO PREFIX "driver started in %s mode\n",
+		(test_bit(EC_FLAGS_GPE_MODE, &ec->flags))?"interrupt":"poll");
 	return 0;
 }
 
@@ -833,7 +843,7 @@ static int acpi_ec_start(struct acpi_device *device)
 	ret = ec_install_handlers(ec);
 
 	/* EC is fully operational, allow queries */
-	atomic_set(&ec->query_pending, 0);
+	clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
 	return ret;
 }
 
@@ -924,20 +934,4 @@ static void __exit acpi_ec_exit(void)
 
 	return;
 }
-#endif				/* 0 */
-
-static int __init acpi_ec_set_intr_mode(char *str)
-{
-	int intr;
-
-	if (!get_option(&str, &intr))
-		return 0;
-
-	acpi_ec_mode = (intr) ? EC_INTR : EC_POLL;
-
-	printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling");
-
-	return 1;
-}
-
-__setup("ec_intr=", acpi_ec_set_intr_mode);
+#endif	/* 0 */
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index c81f6bdb68b8..a5a5532db268 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -47,8 +47,6 @@ MODULE_LICENSE("GPL");
 
 static int acpi_fan_add(struct acpi_device *device);
 static int acpi_fan_remove(struct acpi_device *device, int type);
-static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);
-static int acpi_fan_resume(struct acpi_device *device);
 
 static const struct acpi_device_id fan_device_ids[] = {
 	{"PNP0C0B", 0},
@@ -63,15 +61,9 @@ static struct acpi_driver acpi_fan_driver = {
 	.ops = {
 		.add = acpi_fan_add,
 		.remove = acpi_fan_remove,
-		.suspend = acpi_fan_suspend,
-		.resume = acpi_fan_resume,
 		},
 };
 
-struct acpi_fan {
-	struct acpi_device * device;
-};
-
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
@@ -80,12 +72,12 @@ static struct proc_dir_entry *acpi_fan_dir;
 
 static int acpi_fan_read_state(struct seq_file *seq, void *offset)
 {
-	struct acpi_fan *fan = seq->private;
+	struct acpi_device *device = seq->private;
 	int state = 0;
 
 
-	if (fan) {
-		if (acpi_bus_get_power(fan->device->handle, &state))
+	if (device) {
+		if (acpi_bus_get_power(device->handle, &state))
 			seq_printf(seq, "status:                  ERROR\n");
 		else
 			seq_printf(seq, "status:                  %s\n",
@@ -105,11 +97,10 @@ acpi_fan_write_state(struct file *file, const char __user * buffer,
 {
 	int result = 0;
 	struct seq_file *m = file->private_data;
-	struct acpi_fan *fan = m->private;
+	struct acpi_device *device = m->private;
 	char state_string[12] = { '\0' };
 
-
-	if (!fan || (count > sizeof(state_string) - 1))
+	if (count > sizeof(state_string) - 1)
 		return -EINVAL;
 
 	if (copy_from_user(state_string, buffer, count))
@@ -117,7 +108,7 @@ acpi_fan_write_state(struct file *file, const char __user * buffer,
 
 	state_string[count] = '\0';
 
-	result = acpi_bus_set_power(fan->device->handle,
+	result = acpi_bus_set_power(device->handle,
 				    simple_strtoul(state_string, NULL, 0));
 	if (result)
 		return result;
@@ -158,7 +149,7 @@ static int acpi_fan_add_fs(struct acpi_device *device)
 		return -ENODEV;
 	else {
 		entry->proc_fops = &acpi_fan_state_ops;
-		entry->data = acpi_driver_data(device);
+		entry->data = device;
 		entry->owner = THIS_MODULE;
 	}
 
@@ -191,14 +182,8 @@ static int acpi_fan_add(struct acpi_device *device)
 	if (!device)
 		return -EINVAL;
 
-	fan = kzalloc(sizeof(struct acpi_fan), GFP_KERNEL);
-	if (!fan)
-		return -ENOMEM;
-
-	fan->device = device;
 	strcpy(acpi_device_name(device), "Fan");
 	strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
-	acpi_driver_data(device) = fan;
 
 	result = acpi_bus_get_power(device->handle, &state);
 	if (result) {
@@ -206,10 +191,6 @@ static int acpi_fan_add(struct acpi_device *device)
 		goto end;
 	}
 
-	device->flags.force_power_state = 1;
-	acpi_bus_set_power(device->handle, state);
-	device->flags.force_power_state = 0;
-
 	result = acpi_fan_add_fs(device);
 	if (result)
 		goto end;
@@ -227,53 +208,14 @@ static int acpi_fan_add(struct acpi_device *device)
 
 static int acpi_fan_remove(struct acpi_device *device, int type)
 {
-	struct acpi_fan *fan = NULL;
-
-
 	if (!device || !acpi_driver_data(device))
 		return -EINVAL;
 
-	fan = acpi_driver_data(device);
-
 	acpi_fan_remove_fs(device);
 
-	kfree(fan);
-
 	return 0;
 }
 
-static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
-{
-	if (!device)
-		return -EINVAL;
-
-	acpi_bus_set_power(device->handle, ACPI_STATE_D0);
-
-	return AE_OK;
-}
-
-static int acpi_fan_resume(struct acpi_device *device)
-{
-	int result = 0;
-	int power_state = 0;
-
-	if (!device)
-		return -EINVAL;
-
-	result = acpi_bus_get_power(device->handle, &power_state);
-	if (result) {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-				  "Error reading fan power state\n"));
-		return result;
-	}
-
-	device->flags.force_power_state = 1;
-	acpi_bus_set_power(device->handle, power_state);
-	device->flags.force_power_state = 0;
-
-	return result;
-}
-
 static int __init acpi_fan_init(void)
 {
 	int result = 0;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 57b9a2998fd0..af1769a20c7a 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -86,7 +86,6 @@ struct acpi_power_resource {
 	acpi_bus_id name;
 	u32 system_level;
 	u32 order;
-	int state;
 	struct mutex resource_lock;
 	struct list_head reference;
 };
@@ -128,33 +127,31 @@ acpi_power_get_context(acpi_handle handle,
 	return 0;
 }
 
-static int acpi_power_get_state(struct acpi_power_resource *resource)
+static int acpi_power_get_state(struct acpi_power_resource *resource, int *state)
 {
 	acpi_status status = AE_OK;
 	unsigned long sta = 0;
 
 
-	if (!resource)
+	if (!resource || !state)
 		return -EINVAL;
 
 	status = acpi_evaluate_integer(resource->device->handle, "_STA", NULL, &sta);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
-	if (sta & 0x01)
-		resource->state = ACPI_POWER_RESOURCE_STATE_ON;
-	else
-		resource->state = ACPI_POWER_RESOURCE_STATE_OFF;
+	*state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON:
+			      ACPI_POWER_RESOURCE_STATE_OFF;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n",
-			  resource->name, resource->state ? "on" : "off"));
+			  resource->name, state ? "on" : "off"));
 
 	return 0;
 }
 
 static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
 {
-	int result = 0;
+	int result = 0, state1;
 	struct acpi_power_resource *resource = NULL;
 	u32 i = 0;
 
@@ -168,11 +165,11 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
 		result = acpi_power_get_context(list->handles[i], &resource);
 		if (result)
 			return result;
-		result = acpi_power_get_state(resource);
+		result = acpi_power_get_state(resource, &state1);
 		if (result)
 			return result;
 
-		*state = resource->state;
+		*state = state1;
 
 		if (*state != ACPI_POWER_RESOURCE_STATE_ON)
 			break;
@@ -186,7 +183,7 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
 
 static int acpi_power_on(acpi_handle handle, struct acpi_device *dev)
 {
-	int result = 0;
+	int result = 0, state;
 	int found = 0;
 	acpi_status status = AE_OK;
 	struct acpi_power_resource *resource = NULL;
@@ -224,20 +221,14 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev)
 	}
 	mutex_unlock(&resource->resource_lock);
 
-	if (resource->state == ACPI_POWER_RESOURCE_STATE_ON) {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] already on\n",
-				  resource->name));
-		return 0;
-	}
-
 	status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
-	result = acpi_power_get_state(resource);
+	result = acpi_power_get_state(resource, &state);
 	if (result)
 		return result;
-	if (resource->state != ACPI_POWER_RESOURCE_STATE_ON)
+	if (state != ACPI_POWER_RESOURCE_STATE_ON)
 		return -ENOEXEC;
 
 	/* Update the power resource's _device_ power state */
@@ -250,7 +241,7 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev)
 
 static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev)
 {
-	int result = 0;
+	int result = 0, state;
 	acpi_status status = AE_OK;
 	struct acpi_power_resource *resource = NULL;
 	struct list_head *node, *next;
@@ -281,20 +272,14 @@ static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev)
 	}
 	mutex_unlock(&resource->resource_lock);
 
-	if (resource->state == ACPI_POWER_RESOURCE_STATE_OFF) {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] already off\n",
-				  resource->name));
-		return 0;
-	}
-
 	status = acpi_evaluate_object(resource->device->handle, "_OFF", NULL, NULL);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
-	result = acpi_power_get_state(resource);
+	result = acpi_power_get_state(resource, &state);
 	if (result)
 		return result;
-	if (resource->state != ACPI_POWER_RESOURCE_STATE_OFF)
+	if (state != ACPI_POWER_RESOURCE_STATE_OFF)
 		return -ENOEXEC;
 
 	/* Update the power resource's _device_ power state */
@@ -494,7 +479,7 @@ static struct proc_dir_entry *acpi_power_dir;
 static int acpi_power_seq_show(struct seq_file *seq, void *offset)
 {
 	int count = 0;
-	int result = 0;
+	int result = 0, state;
 	struct acpi_power_resource *resource = NULL;
 	struct list_head *node, *next;
 	struct acpi_power_reference *ref;
@@ -505,12 +490,12 @@ static int acpi_power_seq_show(struct seq_file *seq, void *offset)
 	if (!resource)
 		goto end;
 
-	result = acpi_power_get_state(resource);
+	result = acpi_power_get_state(resource, &state);
 	if (result)
 		goto end;
 
 	seq_puts(seq, "state:                   ");
-	switch (resource->state) {
+	switch (state) {
 	case ACPI_POWER_RESOURCE_STATE_ON:
 		seq_puts(seq, "on\n");
 		break;
@@ -591,7 +576,7 @@ static int acpi_power_remove_fs(struct acpi_device *device)
 
 static int acpi_power_add(struct acpi_device *device)
 {
-	int result = 0;
+	int result = 0, state;
 	acpi_status status = AE_OK;
 	struct acpi_power_resource *resource = NULL;
 	union acpi_object acpi_object;
@@ -622,11 +607,11 @@ static int acpi_power_add(struct acpi_device *device)
 	resource->system_level = acpi_object.power_resource.system_level;
 	resource->order = acpi_object.power_resource.resource_order;
 
-	result = acpi_power_get_state(resource);
+	result = acpi_power_get_state(resource, &state);
 	if (result)
 		goto end;
 
-	switch (resource->state) {
+	switch (state) {
 	case ACPI_POWER_RESOURCE_STATE_ON:
 		device->power.state = ACPI_STATE_D0;
 		break;
@@ -643,7 +628,7 @@ static int acpi_power_add(struct acpi_device *device)
 		goto end;
 
 	printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device),
-	       acpi_device_bid(device), resource->state ? "on" : "off");
+	       acpi_device_bid(device), state ? "on" : "off");
 
       end:
 	if (result)
@@ -680,7 +665,7 @@ static int acpi_power_remove(struct acpi_device *device, int type)
 
 static int acpi_power_resume(struct acpi_device *device)
 {
-	int result = 0;
+	int result = 0, state;
 	struct acpi_power_resource *resource = NULL;
 	struct acpi_power_reference *ref;
 
@@ -689,12 +674,12 @@ static int acpi_power_resume(struct acpi_device *device)
 
 	resource = (struct acpi_power_resource *)acpi_driver_data(device);
 
-	result = acpi_power_get_state(resource);
+	result = acpi_power_get_state(resource, &state);
 	if (result)
 		return result;
 
 	mutex_lock(&resource->resource_lock);
-	if ((resource->state == ACPI_POWER_RESOURCE_STATE_OFF) &&
+	if (state == ACPI_POWER_RESOURCE_STATE_OFF &&
 	    !list_empty(&resource->reference)) {
 		ref = container_of(resource->reference.next, struct acpi_power_reference, node);
 		mutex_unlock(&resource->resource_lock);
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index f3d3867303ec..2c0b6630f8ba 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -167,8 +167,8 @@ static void acpi_pm_finish(void)
 {
 	u32 acpi_state = acpi_target_sleep_state;
 
-	acpi_leave_sleep_state(acpi_state);
 	acpi_disable_wakeup_device(acpi_state);
+	acpi_leave_sleep_state(acpi_state);
 
 	/* reset firmware waking vector */
 	acpi_set_firmware_waking_vector((acpi_physical_address) 0);
@@ -272,8 +272,8 @@ static void acpi_hibernation_finish(void)
 	 * enable it here.
 	 */
 	acpi_enable();
-	acpi_leave_sleep_state(ACPI_STATE_S4);
 	acpi_disable_wakeup_device(ACPI_STATE_S4);
+	acpi_leave_sleep_state(ACPI_STATE_S4);
 
 	/* reset firmware waking vector */
 	acpi_set_firmware_waking_vector((acpi_physical_address) 0);
@@ -410,6 +410,7 @@ static void acpi_power_off(void)
 	/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
 	printk("%s called\n", __FUNCTION__);
 	local_irq_disable();
+	acpi_enable_wakeup_device(ACPI_STATE_S5);
 	acpi_enter_sleep_state(ACPI_STATE_S5);
 }
 
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index fdf4106b817b..d2fabe7863a9 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -19,7 +19,6 @@
 #include "cpuidle.h"
 
 DEFINE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
-EXPORT_PER_CPU_SYMBOL_GPL(cpuidle_devices);
 
 DEFINE_MUTEX(cpuidle_lock);
 LIST_HEAD(cpuidle_detected_devices);
diff --git a/drivers/cpuidle/governor.c b/drivers/cpuidle/governor.c
index bb699cb2dc5a..70b59642a708 100644
--- a/drivers/cpuidle/governor.c
+++ b/drivers/cpuidle/governor.c
@@ -94,8 +94,6 @@ int cpuidle_register_governor(struct cpuidle_governor *gov)
 	return ret;
 }
 
-EXPORT_SYMBOL_GPL(cpuidle_register_governor);
-
 /**
  * cpuidle_replace_governor - find a replacement governor
  * @exclude_rating: the rating that will be skipped while looking for
@@ -138,4 +136,3 @@ void cpuidle_unregister_governor(struct cpuidle_governor *gov)
 	mutex_unlock(&cpuidle_lock);
 }
 
-EXPORT_SYMBOL_GPL(cpuidle_unregister_governor);
diff --git a/drivers/misc/fujitsu-laptop.c b/drivers/misc/fujitsu-laptop.c
index d366a6cc1fd9..c8d62c268b11 100644
--- a/drivers/misc/fujitsu-laptop.c
+++ b/drivers/misc/fujitsu-laptop.c
@@ -122,9 +122,6 @@ static int get_lcd_level(void)
 	else
 		fujitsu->brightness_changed = 0;
 
-	if (status < 0)
-		return status;
-
 	return fujitsu->brightness_level;
 }
 
@@ -198,7 +195,7 @@ static struct platform_driver fujitsupf_driver = {
 
 /* ACPI device */
 
-int acpi_fujitsu_add(struct acpi_device *device)
+static int acpi_fujitsu_add(struct acpi_device *device)
 {
 	int result = 0;
 	int state = 0;
@@ -229,7 +226,7 @@ int acpi_fujitsu_add(struct acpi_device *device)
 	return result;
 }
 
-int acpi_fujitsu_remove(struct acpi_device *device, int type)
+static int acpi_fujitsu_remove(struct acpi_device *device, int type)
 {
 	ACPI_FUNCTION_TRACE("acpi_fujitsu_remove");