ACPI: check battery status on resume for un/plug events during sleep
Add ->resume method to the ACPI battery handler to check
if the battery state has changed during sleep.
If yes, update the ACPI internal data structures
for benefit of /proc/acpi/battery/.
Signed-off-by: Jiri Kosina <jikos@jikos.cz>
Cc: Stefan Seyfried <seife@suse.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9810e2a..026e4075 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -64,6 +64,7 @@
static int acpi_battery_add(struct acpi_device *device);
static int acpi_battery_remove(struct acpi_device *device, int type);
+static int acpi_battery_resume(struct acpi_device *device, int status);
static struct acpi_driver acpi_battery_driver = {
.name = ACPI_BATTERY_DRIVER_NAME,
@@ -71,6 +72,7 @@
.ids = ACPI_BATTERY_HID,
.ops = {
.add = acpi_battery_add,
+ .resume = acpi_battery_resume,
.remove = acpi_battery_remove,
},
};
@@ -753,6 +755,18 @@
return 0;
}
+/* this is needed to learn about changes made in suspended state */
+static int acpi_battery_resume(struct acpi_device *device, int state)
+{
+ struct acpi_battery *battery;
+
+ if (!device)
+ return -EINVAL;
+
+ battery = device->driver_data;
+ return acpi_battery_check(battery);
+}
+
static int __init acpi_battery_init(void)
{
int result;