ACPI: AC: Update AC state on resume
Check if AC state has changed across resume and notify userspace if so.
Fixes "[2.6.24-rc1 regression] AC adapter state does not change after resume"
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Tested-by: Andrey Borzenkov <arvidjaar@mail.ru>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 1461dc9..30238f6 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -59,6 +59,7 @@
static int acpi_ac_add(struct acpi_device *device);
static int acpi_ac_remove(struct acpi_device *device, int type);
+static int acpi_ac_resume(struct acpi_device *device);
const static struct acpi_device_id ac_device_ids[] = {
{"ACPI0003", 0},
@@ -73,6 +74,7 @@
.ops = {
.add = acpi_ac_add,
.remove = acpi_ac_remove,
+ .resume = acpi_ac_resume,
},
};
@@ -307,6 +309,21 @@
return result;
}
+static int acpi_ac_resume(struct acpi_device *device)
+{
+ struct acpi_ac *ac;
+ unsigned old_state;
+ if (!device || !acpi_driver_data(device))
+ return -EINVAL;
+ ac = acpi_driver_data(device);
+ old_state = ac->state;
+ if (acpi_ac_get_state(ac))
+ return 0;
+ if (old_state != ac->state)
+ kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
+ return 0;
+}
+
static int acpi_ac_remove(struct acpi_device *device, int type)
{
acpi_status status = AE_OK;