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hwmon fixes for v6.17-rc5

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- ina238: Various value range fixes when writing limit attributes
 
 - mlxreg-fan: Prevent fans from getting stuck at 0 RPM
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Merge tag 'hwmon-for-v6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - ina238: Various value range fixes when writing limit attributes

 - mlxreg-fan: Prevent fans from getting stuck at 0 RPM

* tag 'hwmon-for-v6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ina238) Correctly clamp power limits
  hwmon: (ina238) Correctly clamp shunt voltage limit
  hwmon: (ina238) Correctly clamp temperature
  hwmon: mlxreg-fan: Prevent fans from getting stuck at 0 RPM
This commit is contained in:
Linus Torvalds 2025-09-05 11:08:06 -07:00
commit 260aa8d5f0
2 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/hwmon/ina238.c
View File

@ -379,7 +379,7 @@ static int ina238_write_in(struct device *dev, u32 attr, int channel,
regval = clamp_val(val, -163, 163);
regval = (regval * 1000 * 4) /
(INA238_SHUNT_VOLTAGE_LSB * data->gain);
regval = clamp_val(regval, S16_MIN, S16_MAX);
regval = clamp_val(regval, S16_MIN, S16_MAX) & 0xffff;
switch (attr) {
case hwmon_in_max:
@ -517,9 +517,10 @@ static int ina238_write_power(struct device *dev, u32 attr, long val)
* Unsigned postive values. Compared against the 24-bit power register,
* lower 8-bits are truncated. Same conversion to/from uW as POWER
* register.
* The first clamp_val() is to establish a baseline to avoid overflows.
*/
regval = clamp_val(val, 0, LONG_MAX);
regval = div_u64(val * 4 * 100 * data->rshunt, data->config->power_calculate_factor *
regval = clamp_val(val, 0, LONG_MAX / 2);
regval = div_u64(regval * 4 * 100 * data->rshunt, data->config->power_calculate_factor *
1000ULL * INA238_FIXED_SHUNT * data->gain);
regval = clamp_val(regval >> 8, 0, U16_MAX);
@ -572,7 +573,7 @@ static int ina238_write_temp(struct device *dev, u32 attr, long val)
return -EOPNOTSUPP;
/* Signed */
regval = clamp_val(val, -40000, 125000);
val = clamp_val(val, -40000, 125000);
regval = div_s64(val * 10000, data->config->temp_lsb) << data->config->temp_shift;
regval = clamp_val(regval, S16_MIN, S16_MAX) & (0xffff << data->config->temp_shift);

5
drivers/hwmon/mlxreg-fan.c
View File

@ -561,15 +561,14 @@ static int mlxreg_fan_cooling_config(struct device *dev, struct mlxreg_fan *fan)
if (!pwm->connected)
continue;
pwm->fan = fan;
/* Set minimal PWM speed. */
pwm->last_hwmon_state = MLXREG_FAN_PWM_DUTY2STATE(MLXREG_FAN_MIN_DUTY);
pwm->cdev = devm_thermal_of_cooling_device_register(dev, NULL, mlxreg_fan_name[i],
pwm, &mlxreg_fan_cooling_ops);
if (IS_ERR(pwm->cdev)) {
dev_err(dev, "Failed to register cooling device\n");
return PTR_ERR(pwm->cdev);
}
/* Set minimal PWM speed. */
pwm->last_hwmon_state = MLXREG_FAN_PWM_DUTY2STATE(MLXREG_FAN_MIN_DUTY);
}
return 0;