Because of C's type promotion rules, the code shifts in "((val16 & 0xFFF) << 4) >> 4;" cancel each other out and they're a no-op. The intention here was to sign-extend then 11th bit so we can use the sign_extend32() function. Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> --- Please review this carefully. I'm pretty sure it's correct but this is the first time I've ever used the sign_extend32() function. diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c index b70873d..ed636c9 100644 --- a/drivers/iio/imu/adis16400_core.c +++ b/drivers/iio/imu/adis16400_core.c @@ -414,7 +414,7 @@ static int adis16400_read_raw(struct iio_dev *indio_dev, mutex_unlock(&indio_dev->mlock); if (ret) return ret; - val16 = ((val16 & 0xFFF) << 4) >> 4; + val16 = sign_extend32(val16, 11); *val = val16; return IIO_VAL_INT; case IIO_CHAN_INFO_OFFSET: -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
