hwmon: (adt7473) Initialize max_duty_at_overheat before use

data->max_duty_at_overheat is not updated in adt7473_update_device,
so it might be used before it is initialized (if the user reads from
sysfs file max_duty_at_crit before writing to it.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/hwmon/adt7473.c b/drivers/hwmon/adt7473.c
index c1009d6f9796..93dbf5e7ff8a 100644
--- a/drivers/hwmon/adt7473.c
+++ b/drivers/hwmon/adt7473.c
@@ -309,6 +309,9 @@ no_sensor_update:
                                                 ADT7473_REG_PWM_BHVR(i));
         }
 
+        i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
+        data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
+
         data->limits_last_updated = local_jiffies;
         data->limits_valid = 1;