[PATCH 4.18 064/145] iio: sca3000: Fix missing return in switch

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>

commit c5b974bee9d2ceae4c441ae5a01e498c2674e100 upstream.

The IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY case is missing a
return and will fall through to the default case and errorenously
return -EINVAL.

Fix this by adding in missing *return ret*.

Fixes: 626f971b5b07 ("staging:iio:accel:sca3000 Add write support to the low pass filter control")
Reported-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/iio/accel/sca3000.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -797,6 +797,7 @@ static int sca3000_write_raw(struct iio_
 		mutex_lock(&st->lock);
 		ret = sca3000_write_3db_freq(st, val);
 		mutex_unlock(&st->lock);
+		return ret;
 	default:
 		return -EINVAL;
 	}