14 files changed, 250 insertions, 292 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 8ae5fac08dfa..33121d6c827c 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -586,11 +586,6 @@ and is between 256 and 4096 characters. It is defined in the file
 
         eata=           [HW,SCSI]
 
-        ec_intr=        [HW,ACPI] ACPI Embedded Controller interrupt mode
-                        Format: <int>
-                        0: polling mode
-                        non-0: interrupt mode (default)
-
         edd=            [EDD]
                         Format: {"of[f]" | "sk[ipmbr]"}
                         See comment in arch/i386/boot/edd.S
diff --git a/MAINTAINERS b/MAINTAINERS
index 231bda28c428..4a26f832b4b5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -216,7 +216,7 @@ P:	Len Brown
 M:      len.brown@intel.com
 M:      lenb@kernel.org
 L:      linux-acpi@vger.kernel.org
-W:      http://acpi.sourceforge.net/
+W:      http://www.lesswatts.org/projects/acpi/
 T:      git kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
 S:      Supported
 
@@ -235,8 +235,8 @@ W:	http://acpi.sourceforge.net/
 S:      Supported
 
 ACPI FAN DRIVER
-P:      Konstantin A. Karasyov
-M:      konstantin.a.karasyov@intel.com
+P:      Len Brown
+M:      len.brown@intel.com
 L:      linux-acpi@vger.kernel.org
 W:      http://acpi.sourceforge.net/
 S:      Supported
@@ -248,15 +248,15 @@ L:	pcihpd-discuss@lists.sourceforge.net
 S:      Supported
 
 ACPI THERMAL DRIVER
-P:      Konstantin A. Karasyov
-M:      konstantin.a.karasyov@intel.com
+P:      Len Brown
+M:      len.brown@intel.com
 L:      linux-acpi@vger.kernel.org
 W:      http://acpi.sourceforge.net/
 S:      Supported
 
 ACPI VIDEO DRIVER
-P:      Luming Yu
-M:      luming.yu@intel.com
+P:      Rui Zhang
+M:      rui.zhang@intel.com
 L:      linux-acpi@vger.kernel.org
 W:      http://acpi.sourceforge.net/
 S:      Supported
@@ -3472,12 +3472,14 @@ L:	linux-pm@lists.linux-foundation.org
 S:      Supported
 
 SUSPEND TO RAM:
+P:      Len Brown
+M:      len.brown@intel.com
 P:      Pavel Machek
 M:      pavel@suse.cz
 P:      Rafael J. Wysocki
 M:      rjw@sisk.pl
 L:      linux-pm@lists.linux-foundation.org
-S:      Maintained
+S:      Supported
 
 SONIC NETWORK DRIVER
 P:      Thomas Bogendoerfer
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");
 
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 7b74b60a68a4..19c3ead2a90b 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -168,8 +168,7 @@ struct acpi_device_flags {
         u32 power_manageable:1;
         u32 performance_manageable:1;
         u32 wake_capable:1;     /* Wakeup(_PRW) supported? */
-        u32 force_power_state:1;
-        u32 reserved:19;
+        u32 reserved:20;
 };
 
 /* File System */