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authorIngo Molnar <mingo@elte.hu>2008-06-16 11:15:58 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-16 11:15:58 +0200
commite765ee90da62535ac7d7a97f2464f9646539d683 (patch)
tree7a9cecce5aab958938e9a3bf46c2302d6af1958c /drivers/acpi/thermal.c
parenta4500b84c51645bbc86be3ca84f2252b7ada060f (diff)
parent066519068ad2fbe98c7f45552b1f592903a9c8c8 (diff)
Diffstat (limited to 'drivers/acpi/thermal.c')
-rw-r--r--drivers/acpi/thermal.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 504385b1f211..84c795fb9b1e 100644
--- 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;