diff options
Diffstat (limited to 'drivers/acpi/device_pm.c')
| -rw-r--r-- | drivers/acpi/device_pm.c | 72 |
1 files changed, 50 insertions, 22 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 4cd4bdab053d..112fd6c55c2c 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -684,19 +684,8 @@ static void acpi_pm_notify_work_func(struct acpi_device_wakeup_context *context) 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; @@ -704,9 +693,12 @@ static int acpi_device_wakeup_enable(struct acpi_device *adev, u32 target_state) 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; @@ -718,6 +710,7 @@ static int acpi_device_wakeup_enable(struct acpi_device *adev, u32 target_state) goto out; } +inc: wakeup->enable_count++; out: @@ -726,6 +719,23 @@ 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. * @@ -752,12 +762,8 @@ out: mutex_unlock(&acpi_wakeup_lock); } -/** - * 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) +static int __acpi_pm_set_device_wakeup(struct device *dev, bool enable, + int max_count) { struct acpi_device *adev; int error; @@ -777,13 +783,35 @@ int acpi_pm_set_device_wakeup(struct device *dev, bool enable) 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); + +/** + * 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. |