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authorGuenter Roeck <linux@roeck-us.net>2018-02-08 04:49:39 +0300
committerGuenter Roeck <linux@roeck-us.net>2018-02-13 01:23:29 +0300
commitaef17ca1271948ee57cc39b2493d31110cc42625 (patch)
treee1cebfb6a7d6c71f0e0539864129dcdbb2569468 /drivers/hwmon
parent7928b2cbe55b2a410a0f5c1f154610059c57b1b2 (diff)
downloadlinux-aef17ca1271948ee57cc39b2493d31110cc42625.tar.xz
hwmon: (k10temp) Only apply temperature offset if result is positive
A user reports a really bad temperature on Ryzen 1950X. k10temp-pci-00cb Adapter: PCI adapter temp1: +4294948.3°C (high = +70.0°C) This will happen if the temperature reported by the chip is lower than the offset temperature. This has been seen in the field if "Sense MI Skew" and/or "Sense MI Offset" BIOS parameters were set to unexpected values. Let's report a temperature of 0 degrees C in that case. Fixes: 1b50b776355f ("hwmon: (k10temp) Add support for temperature offsets") Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/k10temp.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index 06b4e1c78bd8..4c6594a4661d 100644
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -129,7 +129,10 @@ static ssize_t temp1_input_show(struct device *dev,
data->read_tempreg(data->pdev, &regval);
temp = (regval >> 21) * 125;
- temp -= data->temp_offset;
+ if (temp > data->temp_offset)
+ temp -= data->temp_offset;
+ else
+ temp = 0;
return sprintf(buf, "%u\n", temp);
}