In theory, this code path should not be reachable because of the
previous switch statement. But just in case we should make sure we
are restoring the SAMPLE gpio to its original state before returning
in addition to releasing the mutex lock.

Signed-off-by: David Lechner <dlechner@baylibre.com>
---
 drivers/staging/iio/resolver/ad2s1210.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index 84743e31261a..0bdd5a30d45d 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -510,8 +510,8 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
 		ret = IIO_VAL_INT;
 		break;
 	default:
-		mutex_unlock(&st->lock);
-		return -EINVAL;
+		ret = -EINVAL;
+		break;
 	}
 
 error_ret:
-- 
2.34.1