iio: adc: ad4130: Stop using iio_device_claim_direct_scoped()

This complex cleanup.h use case of conditional guards has proved
to be more trouble that it is worth in terms of false positive compiler
warnings and hard to read code.

Move directly to the new claim/release_direct() that allow sparse
to check for unbalanced context.

Cc: Cosmin Tanislav <demonsingur@gmail.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250209180624.701140-11-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad4130.c b/drivers/iio/adc/ad4130.c
index acc241cc0a7a87021e8857f9412d262fd21083b3..061eeb9b1f8de5cd3602f2e19991c404781fa584 100644 (file)
--- a/drivers/iio/adc/ad4130.c
+++ b/drivers/iio/adc/ad4130.c
@@ -1067,13 +1067,11 @@ static int _ad4130_read_sample(struct iio_dev *indio_dev, unsigned int channel,
 static int ad4130_read_sample(struct iio_dev *indio_dev, unsigned int channel,
                              int *val)
 {
-       iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
-               struct ad4130_state *st = iio_priv(indio_dev);
+       struct ad4130_state *st = iio_priv(indio_dev);
 
-               guard(mutex)(&st->lock);
-               return _ad4130_read_sample(indio_dev, channel, val);
-       }
-       unreachable();
+       guard(mutex)(&st->lock);
+
+       return _ad4130_read_sample(indio_dev, channel, val);
 }
 
 static int ad4130_read_raw(struct iio_dev *indio_dev,
@@ -1083,10 +1081,16 @@ static int ad4130_read_raw(struct iio_dev *indio_dev,
        struct ad4130_state *st = iio_priv(indio_dev);
        unsigned int channel = chan->scan_index;
        struct ad4130_setup_info *setup_info = &st->chans_info[channel].setup;
+       int ret;
 
        switch (info) {
        case IIO_CHAN_INFO_RAW:
-               return ad4130_read_sample(indio_dev, channel, val);
+               if (!iio_device_claim_direct(indio_dev))
+                       return -EBUSY;
+
+               ret = ad4130_read_sample(indio_dev, channel, val);
+               iio_device_release_direct(indio_dev);
+               return ret;
        case IIO_CHAN_INFO_SCALE: {
                guard(mutex)(&st->lock);
                *val = st->scale_tbls[setup_info->ref_sel][setup_info->pga][0];