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: 1b50b77635
("hwmon: (k10temp) Add support for temperature offsets")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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@ -129,7 +129,10 @@ static ssize_t temp1_input_show(struct device *dev,
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data->read_tempreg(data->pdev, ®val);
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data->read_tempreg(data->pdev, ®val);
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temp = (regval >> 21) * 125;
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temp = (regval >> 21) * 125;
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temp -= data->temp_offset;
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if (temp > data->temp_offset)
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temp -= data->temp_offset;
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else
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temp = 0;
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return sprintf(buf, "%u\n", temp);
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return sprintf(buf, "%u\n", temp);
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}
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}
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