iio: accel: sca3000: use devm_iio_kfifo_buffer_setup() helper

This change makes use of the devm_iio_kfifo_buffer_setup() helper, however
the unwind order is changed.
The life-time of the kfifo object is attached to the parent device object.
This is to make the driver a bit more consistent with the other IIO
drivers, even though (as it is now before this change) it shouldn't be a
problem.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210215104043.91251-5-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
index 1947386..467b5fc 100644 (file)
--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -1272,20 +1272,6 @@ static int sca3000_write_event_config(struct iio_dev *indio_dev,
        return ret;
 }
 
-static int sca3000_configure_ring(struct iio_dev *indio_dev)
-{
-       struct iio_buffer *buffer;
-
-       buffer = devm_iio_kfifo_allocate(&indio_dev->dev);
-       if (!buffer)
-               return -ENOMEM;
-
-       iio_device_attach_buffer(indio_dev, buffer);
-       indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
-
-       return 0;
-}
-
 static inline
 int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state)
 {
@@ -1479,7 +1465,9 @@ static int sca3000_probe(struct spi_device *spi)
        }
        indio_dev->modes = INDIO_DIRECT_MODE;
 
-       ret = sca3000_configure_ring(indio_dev);
+       ret = devm_iio_kfifo_buffer_setup(&spi->dev, indio_dev,
+                                         INDIO_BUFFER_SOFTWARE,
+                                         &sca3000_ring_setup_ops);
        if (ret)
                return ret;
 
@@ -1493,7 +1481,6 @@ static int sca3000_probe(struct spi_device *spi)
                if (ret)
                        return ret;
        }
-       indio_dev->setup_ops = &sca3000_ring_setup_ops;
        ret = sca3000_clean_setup(st);
        if (ret)
                goto error_free_irq;