Check values to be written to the device for valid lower and upper bounds.
Signed-off-by: Hartmut Knaack <knaack.h@xxxxxx>
---
drivers/iio/accel/mma8452.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index 1463392f679c..516b6108d5f8 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -471,15 +471,17 @@ static int mma8452_write_thresh(struct iio_dev *indio_dev,
switch (info) {
case IIO_EV_INFO_VALUE:
- return mma8452_change_config(data, MMA8452_TRANSIENT_THS,
- val & MMA8452_TRANSIENT_THS_MASK);
+ if (val < 0 || val > MMA8452_TRANSIENT_THS_MASK)
+ return -EINVAL;
+
+ return mma8452_change_config(data, MMA8452_TRANSIENT_THS, val);
case IIO_EV_INFO_PERIOD:
steps = (val * USEC_PER_SEC + val2) /
mma8452_transient_time_step_us[
mma8452_get_odr_index(data)];
- if (steps > 0xff)
+ if (steps < 0 || steps > 0xff)
return -EINVAL;
return mma8452_change_config(data, MMA8452_TRANSIENT_COUNT,
--
2.4.6
--
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