hwmon: (sht15) Properly handle the case CONFIG_REGULATOR=n
When CONFIG_REGULATOR isn't set, regulator_get_voltage() returns 0.
Properly handle this case by not trusting the value.
Reported-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
index 9a15b1a..a610e78 100644
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -542,7 +542,12 @@
/* If a regulator is available, query what the supply voltage actually is!*/
data->reg = regulator_get(data->dev, "vcc");
if (!IS_ERR(data->reg)) {
- data->supply_uV = regulator_get_voltage(data->reg);
+ int voltage;
+
+ voltage = regulator_get_voltage(data->reg);
+ if (voltage)
+ data->supply_uV = voltage;
+
regulator_enable(data->reg);
/* setup a notifier block to update this if another device
* causes the voltage to change */