diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index a9946ec7a3b7768e410d76575a557298ee5f76d1..d325aeafe5cbf23a45fa6b7093535e73f1aaa09a 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -151,6 +151,7 @@ static int exynos_read_raw(struct iio_dev *indio_dev,
 		return -EINVAL;
 
 	mutex_lock(&indio_dev->mlock);
+	reinit_completion(&info->completion);
 
 	/* Select the channel to be used and Trigger conversion */
 	if (info->version == ADC_V2) {