ACPI: battery: check for battery present on /proc/battery access
http://bugzilla.kernel.org/show_bug.cgi?id=7200
Signed-off-by: Vladimir Lebedev <vladimir.p.lebedev@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 2f4521a..0d7a32e 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -324,6 +324,13 @@
return result;
}
+static void acpi_battery_check_present(struct acpi_battery *battery)
+{
+ if (!battery->flags.present) {
+ acpi_battery_check(battery);
+ }
+}
+
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
@@ -340,6 +347,8 @@
if (!battery)
goto end;
+ acpi_battery_check_present(battery);
+
if (battery->flags.present)
seq_printf(seq, "present: yes\n");
else {
@@ -424,6 +433,8 @@
if (!battery)
goto end;
+ acpi_battery_check_present(battery);
+
if (battery->flags.present)
seq_printf(seq, "present: yes\n");
else {
@@ -499,6 +510,8 @@
if (!battery)
goto end;
+ acpi_battery_check_present(battery);
+
if (!battery->flags.present) {
seq_printf(seq, "present: no\n");
goto end;
@@ -536,6 +549,8 @@
if (!battery || (count > sizeof(alarm_string) - 1))
return -EINVAL;
+ acpi_battery_check_present(battery);
+
if (!battery->flags.present)
return -ENODEV;