hwmon: (w83l786ng) Fix fan speed control mode setting and reporting

The wrong mask is used, which causes some fan speed control modes
(pwmX_enable) to be incorrectly reported, and some modes to be
impossible to set.

[JD: add subject and description.]

Signed-off-by: Brian Carnes <bmcarnes@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/hwmon/w83l786ng.c b/drivers/hwmon/w83l786ng.c
index edb06cd..f190219 100644 (file)
--- a/drivers/hwmon/w83l786ng.c
+++ b/drivers/hwmon/w83l786ng.c
@@ -510,7 +510,7 @@ store_pwm_enable(struct device *dev, struct device_attribute *attr,
        mutex_lock(&data->update_lock);
        reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG);
        data->pwm_enable[nr] = val;
-       reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
+       reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]);
        reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr];
        w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg);
        mutex_unlock(&data->update_lock);
@@ -776,7 +776,7 @@ static struct w83l786ng_data *w83l786ng_update_device(struct device *dev)
                            ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1)
                            ? 0 : 1;
                        data->pwm_enable[i] =
-                           ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1;
+                           ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1;
                        data->pwm[i] = w83l786ng_read_value(client,
                            W83L786NG_REG_PWM[i]);
                }