4 files changed, 45 insertions, 4 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index b9b69d9629b5..fc1110d6a078 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -306,6 +306,17 @@ bool acpi_bus_power_manageable(acpi_handle handle)
 
 EXPORT_SYMBOL(acpi_bus_power_manageable);
 
+bool acpi_bus_can_wakeup(acpi_handle handle)
+{
+        struct acpi_device *device;
+        int result;
+
+        result = acpi_bus_get_device(handle, &device);
+        return result ? false : device->wakeup.flags.valid;
+}
+
+EXPORT_SYMBOL(acpi_bus_can_wakeup);
+
 /* --------------------------------------------------------------------------
                                 Event Management
    -------------------------------------------------------------------------- */
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 06f8634fe58b..87c5d456e180 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -166,6 +166,8 @@ static int acpi_bind_one(struct device *dev, acpi_handle handle)
                                 "firmware_node");
                 ret = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
                                 "physical_node");
+                if (acpi_dev->wakeup.flags.valid)
+                        device_set_wakeup_capable(dev, true);
         }
 
         return 0;
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 4addf8ad50ae..af7f4663deaa 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -468,6 +468,31 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
                 *d_min_p = d_min;
         return d_max;
 }
+
+/**
+ *      acpi_pm_device_sleep_wake - enable or disable the system wake-up
+ *                                  capability of given device
+ *      @dev: device to handle
+ *      @enable: 'true' - enable, 'false' - disable the wake-up capability
+ */
+int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
+{
+        acpi_handle handle;
+        struct acpi_device *adev;
+
+        if (!device_may_wakeup(dev))
+                return -EINVAL;
+
+        handle = DEVICE_ACPI_HANDLE(dev);
+        if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
+                printk(KERN_DEBUG "ACPI handle has no context!\n");
+                return -ENODEV;
+        }
+
+        return enable ?
+                acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
+                acpi_disable_wakeup_device_power(adev);
+}
 #endif
 
 static void acpi_power_off_prepare(void)
diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c
index 7422a2213944..38655eb132dc 100644
--- a/drivers/acpi/sleep/wakeup.c
+++ b/drivers/acpi/sleep/wakeup.c
@@ -66,13 +66,15 @@ void acpi_enable_wakeup_device(u8 sleep_state)
         list_for_each_safe(node, next, &acpi_wakeup_device_list) {
                 struct acpi_device *dev =
                         container_of(node, struct acpi_device, wakeup_list);
+
                 if (!dev->wakeup.flags.valid)
                         continue;
+
                 /* If users want to disable run-wake GPE,
                  * we only disable it for wake and leave it for runtime
                  */
-                if (!dev->wakeup.state.enabled ||
-                    sleep_state > (u32) dev->wakeup.sleep_state) {
+                if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+                    || sleep_state > (u32) dev->wakeup.sleep_state) {
                         if (dev->wakeup.flags.run_wake) {
                                 spin_unlock(&acpi_device_lock);
                                 /* set_gpe_type will disable GPE, leave it like that */
@@ -110,8 +112,9 @@ void acpi_disable_wakeup_device(u8 sleep_state)
 
                 if (!dev->wakeup.flags.valid)
                         continue;
-                if (!dev->wakeup.state.enabled ||
-                    sleep_state > (u32) dev->wakeup.sleep_state) {
+
+                if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+                    || sleep_state > (u32) dev->wakeup.sleep_state) {
                         if (dev->wakeup.flags.run_wake) {
                                 spin_unlock(&acpi_device_lock);
                                 acpi_set_gpe_type(dev->wakeup.gpe_device,