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

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

From: Giorgi Tchankvetadze <giorgi@tchankvetadze.com>

commit 8756acd30919a3e9f547ea4a1d4b7f7895f4d340 upstream.

The write_raw callback is documented to return 0 on success or a
negative error code.  However, the IIO_CHAN_INFO_CALIBSCALE case
returns 'val' (the user-supplied value) instead of 0.

Fix it by returning 0 on success, matching the behavior of other
calibscale implementations in the subsystem.

Fixes: 971672c0b3cc ("iio: add Capella CM32181 ambient light sensor driver.")
Signed-off-by: Giorgi Tchankvetadze <giorgi@tchankvetadze.com>
Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/cm32181.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/light/cm32181.c
+++ b/drivers/iio/light/cm32181.c
@@ -369,7 +369,7 @@ static int cm32181_write_raw(struct iio_
 	switch (mask) {
 	case IIO_CHAN_INFO_CALIBSCALE:
 		cm32181->calibscale = val;
-		return val;
+		return 0;
 	case IIO_CHAN_INFO_INT_TIME:
 		ret = cm32181_write_als_it(cm32181, val2);
 		return ret;