[PATCH 04/12] iio: position: iqs624: use devm_blocking_notifier_chain_register()

[Eliav Farber <farbere@amazon.com>]

Replace the blocking_notifier_chain_register() +
devm_add_action_or_reset() pattern with a single call to
devm_blocking_notifier_chain_register(), removing the
iqs624_pos_notifier_unregister() callback.

Signed-off-by: Eliav Farber <farbere@amazon.com>
---
 drivers/iio/position/iqs624-pos.c | 24 +++---------------------
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/drivers/iio/position/iqs624-pos.c b/drivers/iio/position/iqs624-pos.c
index 8239239c6ee2..d2aa2df71457 100644
--- a/drivers/iio/position/iqs624-pos.c
+++ b/drivers/iio/position/iqs624-pos.c
@@ -96,19 +96,6 @@ static int iqs624_pos_notifier(struct notifier_block *notifier,
 	return ret;
 }
 
-static void iqs624_pos_notifier_unregister(void *context)
-{
-	struct iqs624_pos_private *iqs624_pos = context;
-	struct iio_dev *indio_dev = iqs624_pos->indio_dev;
-	int ret;
-
-	ret = blocking_notifier_chain_unregister(&iqs624_pos->iqs62x->nh,
-						 &iqs624_pos->notifier);
-	if (ret)
-		dev_err(indio_dev->dev.parent,
-			"Failed to unregister notifier: %d\n", ret);
-}
-
 static int iqs624_pos_angle_get(struct iqs62x_core *iqs62x, unsigned int *val)
 {
 	int ret;
@@ -255,19 +242,14 @@ static int iqs624_pos_probe(struct platform_device *pdev)
 	mutex_init(&iqs624_pos->lock);
 
 	iqs624_pos->notifier.notifier_call = iqs624_pos_notifier;
-	ret = blocking_notifier_chain_register(&iqs624_pos->iqs62x->nh,
-					       &iqs624_pos->notifier);
+	ret = devm_blocking_notifier_chain_register(&pdev->dev,
+						    &iqs624_pos->iqs62x->nh,
+						    &iqs624_pos->notifier);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret);
 		return ret;
 	}
 
-	ret = devm_add_action_or_reset(&pdev->dev,
-				       iqs624_pos_notifier_unregister,
-				       iqs624_pos);
-	if (ret)
-		return ret;
-
 	return devm_iio_device_register(&pdev->dev, indio_dev);
 }
 
-- 
2.47.3