diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2013-11-09 09:38:14 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2014-01-14 21:36:31 -0800 |
| commit | 9fb6c9c73b11bef65ba80a362547fd116c1e1c9d (patch) | |
| tree | 790f952ca7c7b5170f4233e419323d638f9569c4 /drivers/hwmon/coretemp.c | |
| parent | 347c16cfdecf9b4cfb94137b47bf6a05b3ff57d5 (diff) | |
hwmon: (coretemp) Refine TjMax detection
Intel's turbostat code uses only 7 bits from MSR_IA32_TEMPERATURE_TARGET to
read TjMax, and also only accepts it if the reported temperature is at least
85 degrees C. Play safe and do the same.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/coretemp.c')
| -rw-r--r-- | drivers/hwmon/coretemp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 7eed10e20b38..b2e59b395ce4 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -368,12 +368,12 @@ static int get_tjmax(struct cpuinfo_x86 *c, u32 id, struct device *dev) if (cpu_has_tjmax(c)) dev_warn(dev, "Unable to read TjMax from CPU %u\n", id); } else { - val = (eax >> 16) & 0xff; + val = (eax >> 16) & 0x7f; /* * If the TjMax is not plausible, an assumption * will be used */ - if (val) { + if (val >= 85) { dev_dbg(dev, "TjMax is %d degrees C\n", val); return val * 1000; } |