staging:iio:adxrs450: Reject out of range calibscale values

Instead of silently discarding the upper bits reject out of range values for the
calibscale property.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/staging/iio/gyro/adxrs450_core.c b/drivers/staging/iio/gyro/adxrs450_core.c
index 4c462d36dac9..96e52844377b 100644
--- a/drivers/staging/iio/gyro/adxrs450_core.c
+++ b/drivers/staging/iio/gyro/adxrs450_core.c
@@ -258,9 +258,10 @@ static int adxrs450_write_raw(struct iio_dev *indio_dev,
         int ret;
         switch (mask) {
         case IIO_CHAN_INFO_CALIBBIAS:
+                if (val < -0x400 || val >= 0x400)
+                        return -EINVAL;
                 ret = adxrs450_spi_write_reg_16(indio_dev,
-                                                ADXRS450_DNC1,
-                                                val & 0x3FF);
+                                                ADXRS450_DNC1, val);
                 break;
         default:
                 ret = -EINVAL;