iio: adc: ad9467: 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. Also use guard() to simplify mutex
unlock paths.

Reviewed-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250209180624.701140-16-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad9467.c b/drivers/iio/adc/ad9467.c
index f30119b42ba0cb2cf7edd7a3e28a3d33267fdcf6..f7a9f46ea0dc405e25f312197df4b2131871b4bc 100644 (file)
--- a/drivers/iio/adc/ad9467.c
+++ b/drivers/iio/adc/ad9467.c
@@ -813,6 +813,18 @@ static int ad9467_read_raw(struct iio_dev *indio_dev,
        }
 }
 
+static int __ad9467_update_clock(struct ad9467_state *st, long r_clk)
+{
+       int ret;
+
+       ret = clk_set_rate(st->clk, r_clk);
+       if (ret)
+               return ret;
+
+       guard(mutex)(&st->lock);
+       return ad9467_calibrate(st);
+}
+
 static int ad9467_write_raw(struct iio_dev *indio_dev,
                            struct iio_chan_spec const *chan,
                            int val, int val2, long mask)
@@ -842,14 +854,11 @@ static int ad9467_write_raw(struct iio_dev *indio_dev,
                if (sample_rate == r_clk)
                        return 0;
 
-               iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {
-                       ret = clk_set_rate(st->clk, r_clk);
-                       if (ret)
-                               return ret;
+               if (!iio_device_claim_direct(indio_dev))
+                       return -EBUSY;
 
-                       guard(mutex)(&st->lock);
-                       ret = ad9467_calibrate(st);
-               }
+               ret = __ad9467_update_clock(st, r_clk);
+               iio_device_release_direct(indio_dev);
                return ret;
        default:
                return -EINVAL;