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Commit 4bd35cdb authored by Vladimir Lebedev's avatar Vladimir Lebedev Committed by Len Brown
Browse files

ACPI: battery: check for battery present on /proc/battery access 

http://bugzilla.kernel.org/show_bug.cgi?id=7200



Signed-off-by: default avatarVladimir Lebedev <vladimir.p.lebedev@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent eaefd5fb

drivers/acpi/battery.c

+15 −0
Original line number Diff line number Diff line
@@ -324,6 +324,13 @@ 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)

   -------------------------------------------------------------------------- */
@@ -340,6 +347,8 @@ 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 {
@@ -424,6 +433,8 @@ 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 {
@@ -499,6 +510,8 @@ 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;
@@ -536,6 +549,8 @@ 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;