iio: adc128s052: Fix the error handling path of 'adc128_probe()'

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@wanadoo.fr>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/85189f1cfcf6f5f7b42d8730966f2a074b07b5f5.1629542160.git.christophe.jaillet@wanadoo.fr
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
index 89dfbd31be5c88569655a13c6fc72d70d6635e12..b7c7cba2dc0921d97a81c0e2411c9294bc57cf29 100644 (file)
--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -169,7 +169,13 @@ static int adc128_probe(struct spi_device *spi)
        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;
 }