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ACPI: AC: Update AC state on resume

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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>
This commit is contained in:
Alexey Starikovskiy 2007-11-14 17:00:39 -08:00 committed by Linus Torvalds
parent 8a246ee43f
commit 5bfeca3138
1 changed files with 17 additions and 0 deletions
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17
drivers/acpi/ac.c
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@ -59,6 +59,7 @@ static int acpi_ac_open_fs(struct inode *inode, struct file *file);
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 @@ static struct acpi_driver acpi_ac_driver = {
.ops = {
.add = acpi_ac_add,
.remove = acpi_ac_remove,
.resume = acpi_ac_resume,
},
};
@ -307,6 +309,21 @@ static int acpi_ac_add(struct acpi_device *device)
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;