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>
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@ -941,13 +941,13 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
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if (!tz)
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return -EINVAL;
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/* Get temperature [_TMP] (required) */
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result = acpi_thermal_get_temperature(tz);
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/* Get trip points [_CRT, _PSV, etc.] (required) */
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result = acpi_thermal_get_trip_points(tz);
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if (result)
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return result;
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/* Get trip points [_CRT, _PSV, etc.] (required) */
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result = acpi_thermal_get_trip_points(tz);
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/* Get temperature [_TMP] (required) */
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result = acpi_thermal_get_temperature(tz);
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if (result)
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return result;
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