From: Alexandru Ardelean alexandru.ardelean@analog.com
[ Upstream commit fe2392c67db9730d46f11fc4fadfa7bffa8843fa ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/pressure/zpa2326.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c index cc002b958f7e8..e79729ee151ed 100644 --- a/drivers/iio/pressure/zpa2326.c +++ b/drivers/iio/pressure/zpa2326.c @@ -1255,6 +1255,11 @@ 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 @@ -1262,7 +1267,7 @@ 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) { @@ -1272,16 +1277,13 @@ 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);