hwmon: (f71882fg) Fix various sysfs callback function issues
While working on adding F8000 support I noticed that various of the store sysfs functions (and a few of the show also) had issues. This patch fixes the following issues in these functions: * store: storing the result of strto[u]l in an int, resulting in a possible overflow before boundary checking * store: use of f71882fg_update_device(), we don't want to read the whole device in store functions, just the registers we need * store: use of cached register values instead of reading the needed regs in the store function, including cases where f71882fg_update_device() was not used, this could cause real isues * show: shown value is a calculation of 2 or more cached register reads, without locking the data struct. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Hans de Goede
Jean Delvare
parent
7567a04355
commit
ce0bfa5ee2
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@ -835,6 +835,7 @@ static ssize_t store_fan_full_speed(struct device *dev,
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val = fan_to_reg(val);
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mutex_lock(&data->update_lock);
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data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
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if (data->pwm_enable & (1 << (2 * nr)))
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/* PWM mode */
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count = -EINVAL;
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@ -865,9 +866,10 @@ static ssize_t store_fan_beep(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->fan_beep = f71882fg_read8(data, F71882FG_REG_FAN_BEEP);
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if (val)
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data->fan_beep |= 1 << nr;
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else
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@ -912,10 +914,8 @@ static ssize_t store_in_max(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int val = simple_strtoul(buf, NULL, 10) / 8;
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if (val > 255)
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val = 255;
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long val = simple_strtol(buf, NULL, 10) / 8;
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val = SENSORS_LIMIT(val, 0, 255);
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mutex_lock(&data->update_lock);
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f71882fg_write8(data, F71882FG_REG_IN1_HIGH, val);
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@ -942,9 +942,10 @@ static ssize_t store_in_beep(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_beep = f71882fg_read8(data, F71882FG_REG_IN_BEEP);
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if (val)
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data->in_beep |= 1 << nr;
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else
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@ -991,10 +992,8 @@ static ssize_t store_temp_max(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10) / 1000;
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if (val > 255)
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val = 255;
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long val = simple_strtol(buf, NULL, 10) / 1000;
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val = SENSORS_LIMIT(val, 0, 255);
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mutex_lock(&data->update_lock);
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f71882fg_write8(data, F71882FG_REG_TEMP_HIGH(nr), val);
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@ -1009,9 +1008,13 @@ static ssize_t show_temp_max_hyst(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = f71882fg_update_device(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int temp_max_hyst;
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return sprintf(buf, "%d\n",
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(data->temp_high[nr] - data->temp_hyst[nr]) * 1000);
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mutex_lock(&data->update_lock);
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temp_max_hyst = (data->temp_high[nr] - data->temp_hyst[nr]) * 1000;
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mutex_unlock(&data->update_lock);
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return sprintf(buf, "%d\n", temp_max_hyst);
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}
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static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
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@ -1019,37 +1022,38 @@ static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10) / 1000;
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long val = simple_strtol(buf, NULL, 10) / 1000;
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ssize_t ret = count;
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u8 reg;
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mutex_lock(&data->update_lock);
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/* convert abs to relative and check */
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data->temp_high[nr] = f71882fg_read8(data, F71882FG_REG_TEMP_HIGH(nr));
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val = SENSORS_LIMIT(val, data->temp_high[nr] - 15,
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data->temp_high[nr]);
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val = data->temp_high[nr] - val;
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if (val < 0 || val > 15) {
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ret = -EINVAL;
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goto store_temp_max_hyst_exit;
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}
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data->temp_hyst[nr] = val;
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/* convert value to register contents */
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switch (nr) {
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case 1:
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val = val << 4;
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reg = f71882fg_read8(data, F71882FG_REG_TEMP_HYST1);
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reg = (reg & 0x0f) | (val << 4);
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break;
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case 2:
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val = val | (data->temp_hyst[3] << 4);
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reg = f71882fg_read8(data, F71882FG_REG_TEMP_HYST23);
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reg = (reg & 0xf0) | val;
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break;
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case 3:
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val = data->temp_hyst[2] | (val << 4);
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reg = f71882fg_read8(data, F71882FG_REG_TEMP_HYST23);
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reg = (reg & 0x0f) | (val << 4);
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break;
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}
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f71882fg_write8(data, (nr <= 1) ? F71882FG_REG_TEMP_HYST1 :
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F71882FG_REG_TEMP_HYST23, val);
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F71882FG_REG_TEMP_HYST23, reg);
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store_temp_max_hyst_exit:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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@ -1068,10 +1072,8 @@ static ssize_t store_temp_crit(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10) / 1000;
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if (val > 255)
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val = 255;
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long val = simple_strtol(buf, NULL, 10) / 1000;
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val = SENSORS_LIMIT(val, 0, 255);
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mutex_lock(&data->update_lock);
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f71882fg_write8(data, F71882FG_REG_TEMP_OVT(nr), val);
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@ -1086,9 +1088,13 @@ static ssize_t show_temp_crit_hyst(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = f71882fg_update_device(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int temp_crit_hyst;
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return sprintf(buf, "%d\n",
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(data->temp_ovt[nr] - data->temp_hyst[nr]) * 1000);
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mutex_lock(&data->update_lock);
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temp_crit_hyst = (data->temp_ovt[nr] - data->temp_hyst[nr]) * 1000;
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mutex_unlock(&data->update_lock);
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return sprintf(buf, "%d\n", temp_crit_hyst);
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}
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static ssize_t show_temp_type(struct device *dev, struct device_attribute
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@ -1117,9 +1123,10 @@ static ssize_t store_temp_beep(struct device *dev, struct device_attribute
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{
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_beep = f71882fg_read8(data, F71882FG_REG_TEMP_BEEP);
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if (val)
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data->temp_beep |= 1 << nr;
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else
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@ -1160,16 +1167,16 @@ static ssize_t show_pwm(struct device *dev,
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{
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struct f71882fg_data *data = f71882fg_update_device(dev);
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int val, nr = to_sensor_dev_attr_2(devattr)->index;
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mutex_lock(&data->update_lock);
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if (data->pwm_enable & (1 << (2 * nr)))
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/* PWM mode */
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val = data->pwm[nr];
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else {
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/* RPM mode */
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mutex_lock(&data->update_lock);
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val = 255 * fan_from_reg(data->fan_target[nr])
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/ fan_from_reg(data->fan_full_speed[nr]);
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mutex_unlock(&data->update_lock);
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}
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mutex_unlock(&data->update_lock);
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return sprintf(buf, "%d\n", val);
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}
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@ -1177,23 +1184,26 @@ static ssize_t store_pwm(struct device *dev,
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struct device_attribute *devattr, const char *buf,
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size_t count)
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{
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/* struct f71882fg_data *data = dev_get_drvdata(dev); */
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struct f71882fg_data *data = f71882fg_update_device(dev);
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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long val = simple_strtol(buf, NULL, 10);
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val = SENSORS_LIMIT(val, 0, 255);
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mutex_lock(&data->update_lock);
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data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
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if (data->pwm_enable & (1 << (2 * nr))) {
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/* PWM mode */
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f71882fg_write8(data, F71882FG_REG_PWM(nr), val);
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data->pwm[nr] = val;
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} else {
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/* RPM mode */
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int target = val * fan_from_reg(data->fan_full_speed[nr]) / 255;
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f71882fg_write16(data, F71882FG_REG_FAN_TARGET(nr),
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fan_to_reg(target));
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data->fan_target[nr] = fan_to_reg(target);
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int target, full_speed;
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full_speed = f71882fg_read16(data,
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F71882FG_REG_FAN_FULL_SPEED(nr));
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target = fan_to_reg(val * fan_from_reg(full_speed) / 255);
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f71882fg_write16(data, F71882FG_REG_FAN_TARGET(nr), target);
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data->fan_target[nr] = target;
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data->fan_full_speed[nr] = full_speed;
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}
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mutex_unlock(&data->update_lock);
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@ -1225,6 +1235,7 @@ static ssize_t store_pwm_enable(struct device *dev, struct device_attribute
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return -EINVAL;
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mutex_lock(&data->update_lock);
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data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
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switch (val) {
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case 1:
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data->pwm_enable |= 2 << (2 * nr);
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@ -1258,6 +1269,7 @@ static ssize_t show_pwm_auto_point_pwm(struct device *dev,
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int pwm = to_sensor_dev_attr_2(devattr)->index;
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int point = to_sensor_dev_attr_2(devattr)->nr;
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mutex_lock(&data->update_lock);
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if (data->pwm_enable & (1 << (2 * pwm))) {
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/* PWM mode */
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result = data->pwm_auto_point_pwm[pwm][point];
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@ -1265,6 +1277,7 @@ static ssize_t show_pwm_auto_point_pwm(struct device *dev,
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/* RPM mode */
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result = 32 * 255 / (32 + data->pwm_auto_point_pwm[pwm][point]);
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}
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mutex_unlock(&data->update_lock);
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return sprintf(buf, "%d\n", result);
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}
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@ -1273,14 +1286,14 @@ static ssize_t store_pwm_auto_point_pwm(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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/* struct f71882fg_data *data = dev_get_drvdata(dev); */
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struct f71882fg_data *data = f71882fg_update_device(dev);
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int pwm = to_sensor_dev_attr_2(devattr)->index;
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int point = to_sensor_dev_attr_2(devattr)->nr;
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int val = simple_strtoul(buf, NULL, 10);
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long val = simple_strtol(buf, NULL, 10);
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val = SENSORS_LIMIT(val, 0, 255);
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mutex_lock(&data->update_lock);
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data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
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if (data->pwm_enable & (1 << (2 * pwm))) {
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/* PWM mode */
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} else {
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@ -1331,16 +1344,25 @@ static ssize_t store_pwm_auto_point_temp_hyst(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct f71882fg_data *data = f71882fg_update_device(dev);
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int point = to_sensor_dev_attr_2(devattr)->nr;
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long val = simple_strtol(buf, NULL, 10) / 1000;
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mutex_lock(&data->update_lock);
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data->pwm_auto_point_temp[nr][point] =
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f71882fg_read8(data, F71882FG_REG_POINT_TEMP(nr, point));
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val = SENSORS_LIMIT(val, data->pwm_auto_point_temp[nr][point] - 15,
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data->pwm_auto_point_temp[nr][point]);
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val = data->pwm_auto_point_temp[nr][point] - val;
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if (nr == 0 || nr == 1) {
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data->pwm_auto_point_hyst[0] =
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f71882fg_read8(data, F71882FG_REG_FAN_HYST0);
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} else {
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data->pwm_auto_point_hyst[1] =
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f71882fg_read8(data, F71882FG_REG_FAN_HYST1);
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}
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switch (nr) {
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case 0:
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val = (data->pwm_auto_point_hyst[0] & 0xf0) | val;
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@ -1383,11 +1405,13 @@ static ssize_t store_pwm_interpolate(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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/* struct f71882fg_data *data = dev_get_drvdata(dev); */
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struct f71882fg_data *data = f71882fg_update_device(dev);
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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int val = simple_strtoul(buf, NULL, 10);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->pwm_auto_point_mapping[nr] =
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f71882fg_read8(data, F71882FG_REG_POINT_MAPPING(nr));
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if (val)
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val = data->pwm_auto_point_mapping[nr] | (1 << 4);
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else
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@ -1416,8 +1440,7 @@ static ssize_t store_pwm_auto_point_channel(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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/* struct f71882fg_data *data = dev_get_drvdata(dev); */
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struct f71882fg_data *data = f71882fg_update_device(dev);
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int nr = to_sensor_dev_attr_2(devattr)->index;
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long val = simple_strtol(buf, NULL, 10);
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switch (val) {
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@ -1434,6 +1457,8 @@ static ssize_t store_pwm_auto_point_channel(struct device *dev,
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return -EINVAL;
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}
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mutex_lock(&data->update_lock);
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data->pwm_auto_point_mapping[nr] =
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f71882fg_read8(data, F71882FG_REG_POINT_MAPPING(nr));
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val = (data->pwm_auto_point_mapping[nr] & 0xfc) | val;
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f71882fg_write8(data, F71882FG_REG_POINT_MAPPING(nr), val);
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data->pwm_auto_point_mapping[nr] = val;
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@ -1459,8 +1484,7 @@ static ssize_t store_pwm_auto_point_temp(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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/* struct f71882fg_data *data = dev_get_drvdata(dev); */
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struct f71882fg_data *data = f71882fg_update_device(dev);
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struct f71882fg_data *data = dev_get_drvdata(dev);
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int pwm = to_sensor_dev_attr_2(devattr)->index;
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int point = to_sensor_dev_attr_2(devattr)->nr;
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long val = simple_strtol(buf, NULL, 10) / 1000;
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