hwmon: (sht15) Check return value of regulator_enable()

Not having power is a pretty serious error so check that we are able to
enable the supply and error out if we can't.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org #3.8+; 3.0+ will need manual backport
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
index bfe326e896dfd6d277ed22aec18ff9431ae8b8c1..2507f902fb7aa4ea450079a69bbbf8234e7e0ef4 100644 (file)
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -965,7 +965,13 @@ static int sht15_probe(struct platform_device *pdev)
                if (voltage)
                        data->supply_uv = voltage;
 
-               regulator_enable(data->reg);
+               ret = regulator_enable(data->reg);
+               if (ret != 0) {
+                       dev_err(&pdev->dev,
+                               "failed to enable regulator: %d\n", ret);
+                       return ret;
+               }
+
                /*
                 * Setup a notifier block to update this if another device
                 * causes the voltage to change