[PATCH 4.4 10/44] iio: adc128s052: Fix the error handling path of adc128_probe()

[Greg Kroah-Hartman]

From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

commit bbcf40816b547b3c37af49168950491d20d81ce1 upstream.

A successful 'regulator_enable()' call should be balanced by a
corresponding 'regulator_disable()' call in the error handling path of the
probe, as already done in the remove function.

Update the error handling path accordingly.

Fixes: 913b86468674 ("iio: adc: Add TI ADC128S052")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Reviewed-by: Alexandru Ardelean <ardeleanalex@xxxxxxxxx>
Link: https://lore.kernel.org/r/85189f1cfcf6f5f7b42d8730966f2a074b07b5f5.1629542160.git.christophe.jaillet@xxxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/iio/adc/ti-adc128s052.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -159,7 +159,13 @@ static int adc128_probe(struct spi_devic
 	mutex_init(&adc->lock);
 
 	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto err_disable_regulator;
 
+	return 0;
+
+err_disable_regulator:
+	regulator_disable(adc->reg);
 	return ret;
 }