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authorLen Brown <len.brown@intel.com>2007-02-17 04:11:37 +0100
committerLen Brown <len.brown@intel.com>2007-02-17 04:11:37 +0100
commit4559b438225b01942e1661759db0df55883b1bc0 (patch)
tree2c47cd8b33e8ef2db4e3ae17467170b1cc508f4d /drivers/acpi/battery.c
parentPull bugzilla-7122 into release branch (diff)
parentACPI: battery: check for battery present on /proc/battery access (diff)
downloadlinux-4559b438225b01942e1661759db0df55883b1bc0.tar.xz
linux-4559b438225b01942e1661759db0df55883b1bc0.zip
Pull bugzilla-7200 into release branch
Diffstat (limited to 'drivers/acpi/battery.c')
-rw-r--r--drivers/acpi/battery.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 02de49ef1bce..e64c76c8b726 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -323,6 +323,13 @@ static int acpi_battery_check(struct acpi_battery *battery)
return result;
}
+static void acpi_battery_check_present(struct acpi_battery *battery)
+{
+ if (!battery->flags.present) {
+ acpi_battery_check(battery);
+ }
+}
+
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
@@ -339,6 +346,8 @@ static int acpi_battery_read_info(struct seq_file *seq, void *offset)
if (!battery)
goto end;
+ acpi_battery_check_present(battery);
+
if (battery->flags.present)
seq_printf(seq, "present: yes\n");
else {
@@ -423,6 +432,8 @@ static int acpi_battery_read_state(struct seq_file *seq, void *offset)
if (!battery)
goto end;
+ acpi_battery_check_present(battery);
+
if (battery->flags.present)
seq_printf(seq, "present: yes\n");
else {
@@ -498,6 +509,8 @@ static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
if (!battery)
goto end;
+ acpi_battery_check_present(battery);
+
if (!battery->flags.present) {
seq_printf(seq, "present: no\n");
goto end;
@@ -535,6 +548,8 @@ acpi_battery_write_alarm(struct file *file,
if (!battery || (count > sizeof(alarm_string) - 1))
return -EINVAL;
+ acpi_battery_check_present(battery);
+
if (!battery->flags.present)
return -ENODEV;