ACPI: update thermal temperature

Fix the problem that thermal_get_temp returns the cached value,
which causes the temperature in generic thermal never updates.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5e9641c93fcd..782c2250443e 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -884,10 +884,15 @@ static void acpi_thermal_check(void *data)
 static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
 {
         struct acpi_thermal *tz = thermal->devdata;
+        int result;
 
         if (!tz)
                 return -EINVAL;
 
+        result = acpi_thermal_get_temperature(tz);
+        if (result)
+                return result;
+
         return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature));
 }