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authorZhang Rui <rui.zhang@intel.com>2010-12-08 10:40:49 +0800
committerLen Brown <len.brown@intel.com>2010-12-09 15:34:57 -0500
commit3138b32d5e0998ba3cbd1c74bdc1887d74c5279b (patch)
treee9058af9058161a2e9e180b85b9dcbebd94f068b /drivers/acpi
parent3151dbb04ad5a5bd6358371c0bfb457216d00205 (diff)
downloadlinux-3138b32d5e0998ba3cbd1c74bdc1887d74c5279b.tar.bz2
ACPI battery: update status upon sysfs query
Sometimes the Battery driver doesn't get notifications when it's plugged/unplugged. And this results in the incorrect Battery status reported by the power supply sysfs I/F. Update Battery status first when querying from sysfs. http://marc.info/?l=linux-acpi&m=128855015826728&w=2 Tested_by: Seblu <seblu@seblu.net> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/battery.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 95649d373071..9fb9d5ac939d 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -130,6 +130,8 @@ struct acpi_battery {
unsigned long flags;
};
+static int acpi_battery_update(struct acpi_battery *battery);
+
#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
inline int acpi_battery_present(struct acpi_battery *battery)
@@ -184,6 +186,9 @@ static int acpi_battery_get_property(struct power_supply *psy,
int ret = 0;
struct acpi_battery *battery = to_acpi_battery(psy);
+ if (acpi_battery_update(battery))
+ return -ENODEV;
+
if (acpi_battery_present(battery)) {
/* run battery update only if it is present */
acpi_battery_get_state(battery);