iio: pressure: zpa2326: fix iio_triggered_buffer_postenable position

The iio_triggered_buffer_{predisable,postenable} functions attach/detach
the poll functions.

The iio_triggered_buffer_postenable() should be called before (to attach
the poll func) and then the

The iio_triggered_buffer_predisable() function is hooked directly without
anything, which is probably fine, as the postenable() version seems to also
do some reset/wake-up of the device.
This will mean it will be easier when removing it; i.e. it just gets
removed.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
index 9d0d079..99dfe33 100644 (file)
--- a/drivers/iio/pressure/zpa2326.c
+++ b/drivers/iio/pressure/zpa2326.c
@@ -1243,6 +1243,11 @@ static int zpa2326_postenable_buffer(struct iio_dev *indio_dev)
        const struct zpa2326_private *priv = iio_priv(indio_dev);
        int                           err;
 
+       /* Plug our own trigger event handler. */
+       err = iio_triggered_buffer_postenable(indio_dev);
+       if (err)
+               goto err;
+
        if (!priv->waken) {
                /*
                 * We were already power supplied. Just clear hardware FIFO to
@@ -1250,7 +1255,7 @@ static int zpa2326_postenable_buffer(struct iio_dev *indio_dev)
                 */
                err = zpa2326_clear_fifo(indio_dev, 0);
                if (err)
-                       goto err;
+                       goto err_buffer_predisable;
        }
 
        if (!iio_trigger_using_own(indio_dev) && priv->waken) {
@@ -1260,16 +1265,13 @@ static int zpa2326_postenable_buffer(struct iio_dev *indio_dev)
                 */
                err = zpa2326_config_oneshot(indio_dev, priv->irq);
                if (err)
-                       goto err;
+                       goto err_buffer_predisable;
        }
 
-       /* Plug our own trigger event handler. */
-       err = iio_triggered_buffer_postenable(indio_dev);
-       if (err)
-               goto err;
-
        return 0;
 
+err_buffer_predisable:
+       iio_triggered_buffer_predisable(indio_dev);
 err:
        zpa2326_err(indio_dev, "failed to enable buffering (%d)", err);