Index: linux-pm/drivers/acpi/device_pm.c
===================================================================
--- linux-pm.orig/drivers/acpi/device_pm.c
+++ linux-pm/drivers/acpi/device_pm.c
@@ -682,19 +682,8 @@ static void acpi_pm_notify_work_func(str
 
 static DEFINE_MUTEX(acpi_wakeup_lock);
 
-/**
- * acpi_device_wakeup_enable - Enable wakeup functionality for device.
- * @adev: ACPI device to enable wakeup functionality for.
- * @target_state: State the system is transitioning into.
- *
- * Enable the GPE associated with @adev so that it can generate wakeup signals
- * for the device in response to external (remote) events and enable wakeup
- * power for it.
- *
- * Callers must ensure that @adev is a valid ACPI device node before executing
- * this function.
- */
-static int acpi_device_wakeup_enable(struct acpi_device *adev, u32 target_state)
+static int __acpi_device_wakeup_enable(struct acpi_device *adev,
+				       u32 target_state, int max_count)
 {
 	struct acpi_device_wakeup *wakeup = &adev->wakeup;
 	acpi_status status;
@@ -702,9 +691,12 @@ static int acpi_device_wakeup_enable(str
 
 	mutex_lock(&acpi_wakeup_lock);
 
-	if (wakeup->enable_count > 0)
+	if (wakeup->enable_count >= max_count)
 		goto out;
 
+	if (wakeup->enable_count > 0)
+		goto inc;
+
 	error = acpi_enable_wakeup_device_power(adev, target_state);
 	if (error)
 		goto out;
@@ -716,6 +708,7 @@ static int acpi_device_wakeup_enable(str
 		goto out;
 	}
 
+inc:
 	wakeup->enable_count++;
 
 out:
@@ -724,6 +717,23 @@ out:
 }
 
 /**
+ * acpi_device_wakeup_enable - Enable wakeup functionality for device.
+ * @adev: ACPI device to enable wakeup functionality for.
+ * @target_state: State the system is transitioning into.
+ *
+ * Enable the GPE associated with @adev so that it can generate wakeup signals
+ * for the device in response to external (remote) events and enable wakeup
+ * power for it.
+ *
+ * Callers must ensure that @adev is a valid ACPI device node before executing
+ * this function.
+ */
+static int acpi_device_wakeup_enable(struct acpi_device *adev, u32 target_state)
+{
+	return __acpi_device_wakeup_enable(adev, target_state, 1);
+}
+
+/**
  * acpi_device_wakeup_disable - Disable wakeup functionality for device.
  * @adev: ACPI device to disable wakeup functionality for.
  *
@@ -754,8 +764,9 @@ out:
  * acpi_pm_set_device_wakeup - Enable/disable remote wakeup for given device.
  * @dev: Device to enable/disable to generate wakeup events.
  * @enable: Whether to enable or disable the wakeup functionality.
+ * @max_count: Maximum value of the enable reference counter.
  */
-int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
+int __acpi_pm_set_device_wakeup(struct device *dev, bool enable, int max_count)
 {
 	struct acpi_device *adev;
 	int error;
@@ -775,13 +786,14 @@ int acpi_pm_set_device_wakeup(struct dev
 		return 0;
 	}
 
-	error = acpi_device_wakeup_enable(adev, acpi_target_system_state());
+	error = __acpi_device_wakeup_enable(adev, acpi_target_system_state(),
+					    max_count);
 	if (!error)
 		dev_dbg(dev, "Wakeup enabled by ACPI\n");
 
 	return error;
 }
-EXPORT_SYMBOL(acpi_pm_set_device_wakeup);
+EXPORT_SYMBOL(__acpi_pm_set_device_wakeup);
 
 /**
  * acpi_dev_pm_low_power - Put ACPI device into a low-power state.
Index: linux-pm/include/acpi/acpi_bus.h
===================================================================
--- linux-pm.orig/include/acpi/acpi_bus.h
+++ linux-pm/include/acpi/acpi_bus.h
@@ -605,7 +605,7 @@ acpi_status acpi_add_pm_notifier(struct
 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
 bool acpi_pm_device_can_wakeup(struct device *dev);
 int acpi_pm_device_sleep_state(struct device *, int *, int);
-int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
+int __acpi_pm_set_device_wakeup(struct device *dev, bool enable, int max_count);
 #else
 static inline void acpi_pm_wakeup_event(struct device *dev)
 {
@@ -632,12 +632,22 @@ static inline int acpi_pm_device_sleep_s
 	return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
 		m : ACPI_STATE_D0;
 }
-static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
+static inline int __acpi_pm_set_device_wakeup(struct device *dev, bool enable, int max_count)
 {
 	return -ENODEV;
 }
 #endif
 
+static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
+{
+	return __acpi_pm_set_device_wakeup(dev, enable, 1);
+}
+
+static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable)
+{
+	return __acpi_pm_set_device_wakeup(dev, enable, INT_MAX);
+}
+
 #ifdef CONFIG_ACPI_SLEEP
 u32 acpi_target_system_state(void);
 #else
Index: linux-pm/drivers/pci/pci-acpi.c
===================================================================
--- linux-pm.orig/drivers/pci/pci-acpi.c
+++ linux-pm/drivers/pci/pci-acpi.c
@@ -573,7 +573,7 @@ static int acpi_pci_propagate_wakeup(str
 {
 	while (bus->parent) {
 		if (acpi_pm_device_can_wakeup(&bus->self->dev))
-			return acpi_pm_set_device_wakeup(&bus->self->dev, enable);
+			return acpi_pm_set_bridge_wakeup(&bus->self->dev, enable);
 
 		bus = bus->parent;
 	}
@@ -581,7 +581,7 @@ static int acpi_pci_propagate_wakeup(str
 	/* We have reached the root bus. */
 	if (bus->bridge) {
 		if (acpi_pm_device_can_wakeup(bus->bridge))
-			return acpi_pm_set_device_wakeup(bus->bridge, enable);
+			return acpi_pm_set_bridge_wakeup(bus->bridge, enable);
 	}
 	return 0;
 }
