[PATCH 08/29] iio: adc: stm32-dfsdm: Switch to sparse friendly iio_device_claim/release_direct()

[Jonathan Cameron <jic23@xxxxxxxxxx>]

From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

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.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Olivier Moysan <olivier.moysan@xxxxxxxxxxx>
---
 drivers/iio/adc/stm32-dfsdm-adc.c | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 1cf2594d6872..726ddafc9f6d 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -1275,9 +1275,8 @@ static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = stm32_dfsdm_compute_all_osrs(indio_dev, val);
 		if (!ret) {
@@ -1287,19 +1286,18 @@ static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev,
 			adc->oversamp = val;
 			adc->sample_freq = spi_freq / val;
 		}
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		if (!val)
 			return -EINVAL;
 
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = dfsdm_adc_set_samp_freq(indio_dev, val, spi_freq);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 	}
 
@@ -1355,12 +1353,11 @@ static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = __stm32_dfsdm_read_info_raw(indio_dev, chan, val);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		if (ret)
 			return ret;
 		return IIO_VAL_INT;
-- 
2.48.1