static DEFINE_MUTEX(acpi_wakeup_lock);
static int __acpi_device_wakeup_enable(struct acpi_device *adev,
- u32 target_state, int max_count)
+ u32 target_state)
{
struct acpi_device_wakeup *wakeup = &adev->wakeup;
acpi_status status;
mutex_lock(&acpi_wakeup_lock);
- if (wakeup->enable_count >= max_count)
- goto out;
-
+ /*
+ * If the device wakeup power is already enabled, disable it and enable
+ * it again in case it depends on the configuration of subordinate
+ * devices and the conditions have changed since it was enabled last
+ * time.
+ */
if (wakeup->enable_count > 0)
- goto inc;
+ acpi_disable_wakeup_device_power(adev);
error = acpi_enable_wakeup_device_power(adev, target_state);
- if (error)
+ if (error) {
+ if (wakeup->enable_count > 0) {
+ acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number);
+ wakeup->enable_count = 0;
+ }
goto out;
+ }
+
+ if (wakeup->enable_count > 0)
+ goto inc;
status = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number);
if (ACPI_FAILURE(status)) {
(unsigned int)wakeup->gpe_number);
inc:
- wakeup->enable_count++;
+ if (wakeup->enable_count < INT_MAX)
+ wakeup->enable_count++;
+ else
+ acpi_handle_info(adev->handle, "Wakeup enable count out of bounds!\n");
out:
mutex_unlock(&acpi_wakeup_lock);
*/
static int acpi_device_wakeup_enable(struct acpi_device *adev, u32 target_state)
{
- return __acpi_device_wakeup_enable(adev, target_state, 1);
+ return __acpi_device_wakeup_enable(adev, target_state);
}
/**
mutex_unlock(&acpi_wakeup_lock);
}
-static int __acpi_pm_set_device_wakeup(struct device *dev, bool enable,
- int max_count)
+/**
+ * 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.
+ */
+int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
{
struct acpi_device *adev;
int error;
return 0;
}
- error = __acpi_device_wakeup_enable(adev, acpi_target_system_state(),
- max_count);
+ error = __acpi_device_wakeup_enable(adev, acpi_target_system_state());
if (!error)
dev_dbg(dev, "Wakeup enabled by ACPI\n");
return error;
}
-
-/**
- * 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.
- */
-int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
-{
- return __acpi_pm_set_device_wakeup(dev, enable, 1);
-}
EXPORT_SYMBOL_GPL(acpi_pm_set_device_wakeup);
-/**
- * acpi_pm_set_bridge_wakeup - Enable/disable remote wakeup for given bridge.
- * @dev: Bridge device to enable/disable to generate wakeup events.
- * @enable: Whether to enable or disable the wakeup functionality.
- */
-int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable)
-{
- return __acpi_pm_set_device_wakeup(dev, enable, INT_MAX);
-}
-EXPORT_SYMBOL_GPL(acpi_pm_set_bridge_wakeup);
-
/**
* acpi_dev_pm_low_power - Put ACPI device into a low-power state.
* @dev: Device to put into a low-power state.