iio: adc: stm32-dfsdm: Switch to sparse friendly iio_device_claim/release_direct()

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.

Reviewed-by: Olivier Moysan <olivier.moysan@foss.st.com>
Link: https://patch.msgid.link/20250217141630.897334-9-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 1cf2594d6872341934303e1be1d7c93e013af161..726ddafc9f6d296f4584bce4a3e43e96aae8fbef 100644 (file)
--- 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;