diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index e0ee0c0..6783986 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -21,12 +21,12 @@
 ACPI_MODULE_NAME("wakeup_devices")
 
 /**
- * acpi_enable_wakeup_device_prep - prepare wakeup devices
- *	@sleep_state:	ACPI state
- * Enable all wakup devices power if the devices' wakeup level
- * is higher than requested sleep level
+ * acpi_enable_wakeup_device_prep - Prepare wake-up devices.
+ * @sleep_state: ACPI system sleep state.
+ *
+ * Enable all wake-up devices' power, unless the requested system sleep state is
+ * too deep.
  */
-
 void acpi_enable_wakeup_device_prep(u8 sleep_state)
 {
 	struct list_head *node, *next;
@@ -36,9 +36,8 @@
 						       struct acpi_device,
 						       wakeup_list);
 
-		if (!dev->wakeup.flags.valid ||
-		    !dev->wakeup.state.enabled ||
-		    (sleep_state > (u32) dev->wakeup.sleep_state))
+		if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
+		    || (sleep_state > (u32) dev->wakeup.sleep_state))
 			continue;
 
 		acpi_enable_wakeup_device_power(dev, sleep_state);
@@ -46,9 +45,12 @@
 }
 
 /**
- * acpi_enable_wakeup_device - enable wakeup devices
- *	@sleep_state:	ACPI state
- * Enable all wakup devices's GPE
+ * acpi_enable_wakeup_device - Enable wake-up device GPEs.
+ * @sleep_state: ACPI system sleep state.
+ *
+ * Enable all wake-up devices' GPEs, with the assumption that
+ * acpi_disable_all_gpes() was executed before, so we don't need to disable any
+ * GPEs here.
  */
 void acpi_enable_wakeup_device(u8 sleep_state)
 {
@@ -65,29 +67,22 @@
 		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 && !dev->wakeup.prepare_count)
-		    || sleep_state > (u32) dev->wakeup.sleep_state) {
-			if (dev->wakeup.flags.run_wake) {
-				/* set_gpe_type will disable GPE, leave it like that */
-				acpi_set_gpe_type(dev->wakeup.gpe_device,
-						  dev->wakeup.gpe_number,
-						  ACPI_GPE_TYPE_RUNTIME);
-			}
+		    || sleep_state > (u32) dev->wakeup.sleep_state)
 			continue;
-		}
-		if (!dev->wakeup.flags.run_wake)
-			acpi_enable_gpe(dev->wakeup.gpe_device,
-					dev->wakeup.gpe_number);
+
+		/* The wake-up power should have been enabled already. */
+		acpi_set_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+				ACPI_GPE_ENABLE);
 	}
 }
 
 /**
- * acpi_disable_wakeup_device - disable devices' wakeup capability
- *	@sleep_state:	ACPI state
- * Disable all wakup devices's GPE and wakeup capability
+ * acpi_disable_wakeup_device - Disable devices' wakeup capability.
+ * @sleep_state: ACPI system sleep state.
+ *
+ * This function only affects devices with wakeup.state.enabled set, which means
+ * that it reverses the changes made by acpi_enable_wakeup_device_prep().
  */
 void acpi_disable_wakeup_device(u8 sleep_state)
 {
@@ -97,30 +92,11 @@
 		struct acpi_device *dev =
 			container_of(node, struct acpi_device, wakeup_list);
 
-		if (!dev->wakeup.flags.valid)
+		if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
+		    || (sleep_state > (u32) dev->wakeup.sleep_state))
 			continue;
 
-		if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
-		    || sleep_state > (u32) dev->wakeup.sleep_state) {
-			if (dev->wakeup.flags.run_wake) {
-				acpi_set_gpe_type(dev->wakeup.gpe_device,
-						  dev->wakeup.gpe_number,
-						  ACPI_GPE_TYPE_WAKE_RUN);
-				/* Re-enable it, since set_gpe_type will disable it */
-				acpi_enable_gpe(dev->wakeup.gpe_device,
-						dev->wakeup.gpe_number);
-			}
-			continue;
-		}
-
 		acpi_disable_wakeup_device_power(dev);
-		/* Never disable run-wake GPE */
-		if (!dev->wakeup.flags.run_wake) {
-			acpi_disable_gpe(dev->wakeup.gpe_device,
-					 dev->wakeup.gpe_number);
-			acpi_clear_gpe(dev->wakeup.gpe_device,
-				       dev->wakeup.gpe_number, ACPI_NOT_ISR);
-		}
 	}
 }
 
@@ -136,11 +112,8 @@
 		/* In case user doesn't load button driver */
 		if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
 			continue;
-		acpi_set_gpe_type(dev->wakeup.gpe_device,
-				  dev->wakeup.gpe_number,
-				  ACPI_GPE_TYPE_WAKE_RUN);
-		acpi_enable_gpe(dev->wakeup.gpe_device,
-				dev->wakeup.gpe_number);
+ 		acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+ 				ACPI_GPE_TYPE_WAKE);
 		dev->wakeup.state.enabled = 1;
 	}
 	mutex_unlock(&acpi_device_lock);