iio:ad5064: Fix off by one in DAC value range check

The DAC value range check allows values one larger than the maximum value, which
effectively results in setting the DAC value to 0. This patch fixes the issue.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c
index 7b777083cb48..f724a54bf334 100644
--- a/drivers/iio/dac/ad5064.c
+++ b/drivers/iio/dac/ad5064.c
@@ -257,7 +257,7 @@ static int ad5064_write_raw(struct iio_dev *indio_dev,
 
         switch (mask) {
         case IIO_CHAN_INFO_RAW:
-                if (val > (1 << chan->scan_type.realbits) || val < 0)
+                if (val >= (1 << chan->scan_type.realbits) || val < 0)
                         return -EINVAL;
 
                 mutex_lock(&indio_dev->mlock);