Allow the ACPI battery device to be resumed and suspended
asynchronously.
This only means that the driver's suspend and resume callbacks may
be executed in parallel with the callbacks of devices that don't
directly depend on the battery device (i.e. that are not its parent
or children).
Index: linux-2.6/drivers/acpi/battery.c
===================================================================
--- linux-2.6.orig/drivers/acpi/battery.c
+++ linux-2.6/drivers/acpi/battery.c
@@ -837,6 +837,7 @@ static int acpi_battery_add(struct acpi_
printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
device->status.battery_present ? "present" : "absent");
+ device_enable_async_suspend(&device->dev, true);
} else {
#ifdef CONFIG_ACPI_PROCFS_POWER
acpi_battery_remove_fs(device);
--
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