5.15-stable review patch. If anyone has any objections, please let me know.
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From: Tim Harvey tharvey@gateworks.com
commit 9c62e2282900332c8b711d9f9e37af369a8ef71b upstream.
The Linux hwmon sysfs API values for pwmX_auto_pointY_pwm represent an integer value between 0 (0%) to 255 (100%) and the pwmX_auto_pointY_temp represent millidegrees Celcius.
Commit a6d80df47ee2 ("hwmon: (gsc-hwmon) fix fan pwm temperature scaling") properly addressed the incorrect scaling in the pwm_auto_point_temp_store implementation but erroneously scaled the pwm_auto_point_pwm_show (pwm value) instead of the pwm_auto_point_temp_show (temp value) resulting in: # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_pwm 25500 # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_temp 4500
Fix the scaling of these attributes: # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_pwm 255 # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_temp 45000
Fixes: a6d80df47ee2 ("hwmon: (gsc-hwmon) fix fan pwm temperature scaling") Cc: stable@vger.kernel.org Signed-off-by: Tim Harvey tharvey@gateworks.com Link: https://lore.kernel.org/r/20250718200259.1840792-1-tharvey@gateworks.com Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hwmon/gsc-hwmon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/hwmon/gsc-hwmon.c +++ b/drivers/hwmon/gsc-hwmon.c @@ -65,7 +65,7 @@ static ssize_t pwm_auto_point_temp_show( return ret;
ret = regs[0] | regs[1] << 8; - return sprintf(buf, "%d\n", ret * 10); + return sprintf(buf, "%d\n", ret * 100); }
static ssize_t pwm_auto_point_temp_store(struct device *dev, @@ -100,7 +100,7 @@ static ssize_t pwm_auto_point_pwm_show(s { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10))); + return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10)) / 100); }
static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm_auto_point_pwm, 0);