diff mbox series

[RFC,11/27] iio: adc: ad4130: Stop using iio_device_claim_direct_scoped()

Message ID 20250105172613.1204781-12-jic23@kernel.org (mailing list archive)
State New
Headers show
Series iio: improve handling of direct mode claim and release | expand

Commit Message

Jonathan Cameron Jan. 5, 2025, 5:25 p.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/ad4130.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/iio/adc/ad4130.c b/drivers/iio/adc/ad4130.c
index 09012f33ff16..1a38b52abbe4 100644
--- a/drivers/iio/adc/ad4130.c
+++ b/drivers/iio/adc/ad4130.c
@@ -1074,10 +1074,16 @@  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];