ACPI ac: update AC status upon sysfs query

http://marc.info/?l=linux-acpi&m=128855015826728&w=2
https://bugzilla.kernel.org/show_bug.cgi?id=21722

Tested_by: Seblu <seblu@seblu.net>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index ba9afea..25d3aae 100644 (file)
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -100,24 +100,7 @@ static const struct file_operations acpi_ac_fops = {
        .release = single_release,
 };
 #endif
-static int get_ac_property(struct power_supply *psy,
-                          enum power_supply_property psp,
-                          union power_supply_propval *val)
-{
-       struct acpi_ac *ac = to_acpi_ac(psy);
-       switch (psp) {
-       case POWER_SUPPLY_PROP_ONLINE:
-               val->intval = ac->state;
-               break;
-       default:
-               return -EINVAL;
-       }
-       return 0;
-}
 
-static enum power_supply_property ac_props[] = {
-       POWER_SUPPLY_PROP_ONLINE,
-};
 /* --------------------------------------------------------------------------
                                AC Adapter Management
    -------------------------------------------------------------------------- */
@@ -140,6 +123,35 @@ static int acpi_ac_get_state(struct acpi_ac *ac)
        return 0;
 }
 
+/* --------------------------------------------------------------------------
+                            sysfs I/F
+   -------------------------------------------------------------------------- */
+static int get_ac_property(struct power_supply *psy,
+                          enum power_supply_property psp,
+                          union power_supply_propval *val)
+{
+       struct acpi_ac *ac = to_acpi_ac(psy);
+
+       if (!ac)
+               return -ENODEV;
+
+       if (acpi_ac_get_state(ac))
+               return -ENODEV;
+
+       switch (psp) {
+       case POWER_SUPPLY_PROP_ONLINE:
+               val->intval = ac->state;
+               break;
+       default:
+               return -EINVAL;
+       }
+       return 0;
+}
+
+static enum power_supply_property ac_props[] = {
+       POWER_SUPPLY_PROP_ONLINE,
+};
+
 #ifdef CONFIG_ACPI_PROCFS_POWER
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)