Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[pandora-kernel.git] / drivers / acpi / thermal.c

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 504385b..84c795f 100644 (file)
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -364,10 +364,17 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
        if (flag & ACPI_TRIPS_CRITICAL) {
                status = acpi_evaluate_integer(tz->device->handle,
                                "_CRT", NULL, &tz->trips.critical.temperature);
-               if (ACPI_FAILURE(status)) {
+               /*
+                * Treat freezing temperatures as invalid as well; some
+                * BIOSes return really low values and cause reboots at startup.
+                * Below zero (Celcius) values clearly aren't right for sure..
+                * ... so lets discard those as invalid.
+                */
+               if (ACPI_FAILURE(status) ||
+                               tz->trips.critical.temperature <= 2732) {
                        tz->trips.critical.flags.valid = 0;
                        ACPI_EXCEPTION((AE_INFO, status,
-                                       "No critical threshold"));
+                                       "No or invalid critical threshold"));
                        return -ENODEV;
                } else {
                        tz->trips.critical.flags.valid = 1;