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authorMatthew Garrett <mjg@redhat.com>2012-02-01 10:26:54 -0500
committerLen Brown <len.brown@intel.com>2012-03-30 02:38:31 -0400
commit9bcb8118965ab4631a65ee0726e6518f75cda6c5 (patch)
treea1e6d0faea5a6ad75333ca9f2a7ff239405e786b /drivers/acpi
parentf1f0e2ac596f531c15b7b09ebeb8cfd011fffbd2 (diff)
downloadtalos-op-linux-9bcb8118965ab4631a65ee0726e6518f75cda6c5.tar.gz
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ACPI: Evaluate thermal trip points before reading temperature
An HP laptop (Pavilion G4-1016tx) has the following code in _TMP: Store (\_SB.PCI0.LPCB.EC0.RTMP, Local0) If (LGreaterEqual (Local0, S4TP)) { Store (One, HTS4) } S4TP is initialised at 0 and not programmed further until either _HOT or _CRT is called. If we evaluate _TMP before the trip points then HTS4 will always be set, causing the firmware to generate a message on boot complaining that the system shut down because of overheating. The simplest solution is just to reverse the checking of trip points and _TMP in thermal init. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/thermal.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 48fbc647b178..7dbebea1ec31 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -941,13 +941,13 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
if (!tz)
return -EINVAL;
- /* Get temperature [_TMP] (required) */
- result = acpi_thermal_get_temperature(tz);
+ /* Get trip points [_CRT, _PSV, etc.] (required) */
+ result = acpi_thermal_get_trip_points(tz);
if (result)
return result;
- /* Get trip points [_CRT, _PSV, etc.] (required) */
- result = acpi_thermal_get_trip_points(tz);
+ /* Get temperature [_TMP] (required) */
+ result = acpi_thermal_get_temperature(tz);
if (result)
return result;
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