hwmon: (f75375s) Do not overwrite values read from registers

All bits in the values read from registers to be used for the next
write were getting overwritten, avoid doing so to not mess with the
current configuration.

Signed-off-by: Guillem Jover <guillem@hadrons.org>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: stable@kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index e5828c009d9125105a9c6348e3a93764ad73ff58..9638d58f99fdb0e56f15832f824dc6096d99d3ea 100644 (file)
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -298,7 +298,7 @@ static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
                return -EINVAL;
 
        fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
-       fanmode = ~(3 << FAN_CTRL_MODE(nr));
+       fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 
        switch (val) {
        case 0: /* Full speed */
@@ -350,7 +350,7 @@ static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 
        mutex_lock(&data->update_lock);
        conf = f75375_read8(client, F75375_REG_CONFIG1);
-       conf = ~(1 << FAN_CTRL_LINEAR(nr));
+       conf &= ~(1 << FAN_CTRL_LINEAR(nr));
 
        if (val == 0)
                conf |= (1 << FAN_CTRL_LINEAR(nr)) ;