[PATCH 22/29] iio: adc: at91-sama5d2: 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>
Cc: Claudiu Beznea <claudiu.beznea@xxxxxxxxx>
---
 drivers/iio/adc/at91-sama5d2_adc.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 70d3dbb39b25..694ff96fc913 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1914,12 +1914,11 @@ static int at91_adc_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 = at91_adc_read_info_locked(indio_dev, chan, val);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 
 	case IIO_CHAN_INFO_SCALE:
@@ -1932,12 +1931,11 @@ static int at91_adc_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_PROCESSED:
 		if (chan->type != IIO_TEMP)
 			return -EINVAL;
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 
 		ret = at91_adc_read_temp(indio_dev, chan, val);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 
 		return ret;
 
@@ -1967,28 +1965,26 @@ static int at91_adc_write_raw(struct iio_dev *indio_dev,
 		if (val == st->oversampling_ratio)
 			return 0;
 
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		mutex_lock(&st->lock);
 		/* update ratio */
 		ret = at91_adc_config_emr(st, val, 0);
 		mutex_unlock(&st->lock);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return ret;
 	case IIO_CHAN_INFO_SAMP_FREQ:
 		if (val < st->soc_info.min_sample_rate ||
 		    val > st->soc_info.max_sample_rate)
 			return -EINVAL;
 
-		ret = iio_device_claim_direct_mode(indio_dev);
-		if (ret)
-			return ret;
+		if (!iio_device_claim_direct(indio_dev))
+			return -EBUSY;
 		mutex_lock(&st->lock);
 		at91_adc_setup_samp_freq(indio_dev, val,
 					 st->soc_info.startup_time, 0);
 		mutex_unlock(&st->lock);
-		iio_device_release_direct_mode(indio_dev);
+		iio_device_release_direct(indio_dev);
 		return 0;
 	default:
 		return -EINVAL;
-- 
2.48.1