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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>
This commit is contained in:
Zhang Rui 2010-12-08 10:40:49 +08:00 committed by Len Brown
parent 3151dbb04a
commit 3138b32d5e
1 changed files with 5 additions and 0 deletions
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5
drivers/acpi/battery.c
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@ -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);