Messages in this thread Patch in this message | | | From | Len Brown <> | Subject | [PATCH 53/76] ACPI: Evaluate thermal trip points before reading temperature | Date | Fri, 30 Mar 2012 06:13:56 -0400 |
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From: Matthew Garrett <mjg@redhat.com>
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> --- drivers/acpi/thermal.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 48fbc64..7dbebea 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; -- 1.7.10.rc2.19.gfae9d
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