ACPI battery supports device async actions.
Create an async domain for every ACPI battery device,
so that ACPI battery can be resumed asynchronously.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
drivers/acpi/battery.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
Index: linux-2.6/drivers/acpi/battery.c
===================================================================
--- linux-2.6.orig/drivers/acpi/battery.c
+++ linux-2.6/drivers/acpi/battery.c
@@ -829,6 +829,17 @@ static int acpi_battery_add(struct acpi_
strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
device->driver_data = battery;
mutex_init(&battery->lock);
+
+ /*
+ * dev_async_register must be called before any of its child
+ * device being registered, i.e. power supply sysfs class device.
+ */
+ result = dev_async_register(&device->dev, DEV_ASYNC_RESUME);
+ if (result) {
+ kfree(battery);
+ return result;
+ }
+
acpi_battery_update(battery);
#ifdef CONFIG_ACPI_PROCFS_POWER
result = acpi_battery_add_fs(device);
@@ -841,6 +852,7 @@ static int acpi_battery_add(struct acpi_
#ifdef CONFIG_ACPI_PROCFS_POWER
acpi_battery_remove_fs(device);
#endif
+ dev_async_unregister(&device->dev);
kfree(battery);
}
return result;
@@ -859,6 +871,7 @@ static int acpi_battery_remove(struct ac
#ifdef CONFIG_ACPI_SYSFS_POWER
sysfs_remove_battery(battery);
#endif
+ dev_async_unregister(&device->dev);
mutex_destroy(&battery->lock);
kfree(battery);
return 0;
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