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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2007-07-18 23:45:45 -0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-07-21 23:49:55 -0400 |
| commit | a8fba3da3d11d808137be7ebeb3b6938a42f011f (patch) | |
| tree | caf34342b50fcd152625655e785d78c982151ad1 /drivers/misc | |
| parent | edf0e0e56904f794c97ca6c4562d8256e3d8d8e3 (diff) | |
| download | linux-3.10-a8fba3da3d11d808137be7ebeb3b6938a42f011f.tar.gz linux-3.10-a8fba3da3d11d808137be7ebeb3b6938a42f011f.tar.bz2 linux-3.10-a8fba3da3d11d808137be7ebeb3b6938a42f011f.zip | |
ACPI: thinkpad-acpi: make sure DSDT TMPx readings don't return +128
We get +128 instead of -128 from the DSDT TMPx methods, due to errors when
converting a EC byte return that is a s8 to an ACPI handler return that is
an int.
Fix it once and for all, by clamping acceptable temperature readings from
DSDT TMPx so that anything outside the [-127,+127] range is converted to
TP_EC_THERMAL_TMP_NA (-128).
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Michael Olbrich <michael.olbrich@gmx.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 623d36fd8db..f74d7d600d8 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -2853,6 +2853,8 @@ static int thermal_get_sensor(int idx, s32 *value) snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); if (!acpi_evalf(ec_handle, &t, tmpi, "d")) return -EIO; + if (t > 127 || t < -127) + t = TP_EC_THERMAL_TMP_NA; *value = t * 1000; return 0; } |