[PATCH v3 3/4] iio: light: opt4001: Reject integration times with a non-zero seconds part

[Nikhil Gautam <nikhilgtr@gmail.com>]

opt4001_write_raw() only looks at val2 when setting the integration
time, so a write such as 1.000600 is silently accepted as 600 us.
Return -EINVAL if val is non-zero.

Fixes: 9a9608418292 ("iio: light: Add support for TI OPT4001 light sensor")
Signed-off-by: Nikhil Gautam <nikhilgtr@gmail.com>
---
 drivers/iio/light/opt4001.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/light/opt4001.c b/drivers/iio/light/opt4001.c
index a0f174888384..bb4be6384e4c 100644
--- a/drivers/iio/light/opt4001.c
+++ b/drivers/iio/light/opt4001.c
@@ -269,6 +269,9 @@ static int opt4001_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_INT_TIME:
+		if (val)
+			return -EINVAL;
+
 		int_time = opt4001_als_time_to_index(val2);
 		if (int_time < 0)
 			return int_time;
-- 
2.39.5