[PATCH 14/29] iio: adc: ad7606: Switch to sparse friendly iio_device_claim/release_direct()

[Jonathan Cameron <jic23@kernel.org>]

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

These new functions allow sparse to find failures to release
direct mode reducing chances of bugs over the claim_direct_mode()
functions that are deprecated.

This driver got partly converted during removal of the _scoped form.
However some more cases got added in parallel.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/ad7606.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 87908cc51e48..f566248db70a 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -862,11 +862,10 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 		val = (val * MICRO) + val2;
 		i = find_closest(val, scale_avail_uv, cs->num_scales);
 
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret < 0)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = st->write_scale(indio_dev, ch, i + cs->reg_offset);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		if (ret < 0)
 			return ret;
 		cs->range = i;
@@ -878,11 +877,10 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 		i = find_closest(val, st->oversampling_avail,
 				 st->num_os_ratios);
 
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret < 0)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		ret = st->write_os(indio_dev, i);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		if (ret < 0)
 			return ret;
 		st->oversampling = st->oversampling_avail[i];
-- 
2.48.1