linux-kernel - [PATCH 1/2] counter: ti-ecap-capture: Convert to platform remove callback returning void

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Message-ID:  <f70902b2aabecaa9295c28629cd7a8a0e6eb06d0.1710057753.git.u.kleine-koenig@pengutronix.de>
Date: Sun, 10 Mar 2024 09:06:06 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: William Breathitt Gray <william.gray@...aro.org>
Cc: Vignesh Raghavendra <vigneshr@...com>,
	Julien Panis <jpanis@...libre.com>,
	linux-iio@...r.kernel.org,
	linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH 1/2] counter: ti-ecap-capture: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/counter/ti-ecap-capture.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/counter/ti-ecap-capture.c b/drivers/counter/ti-ecap-capture.c
index fb1cb1774674..d33d35055b91 100644
--- a/drivers/counter/ti-ecap-capture.c
+++ b/drivers/counter/ti-ecap-capture.c
@@ -537,15 +537,13 @@ static int ecap_cnt_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int ecap_cnt_remove(struct platform_device *pdev)
+static void ecap_cnt_remove(struct platform_device *pdev)
 {
 	struct counter_device *counter_dev = platform_get_drvdata(pdev);
 	struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev);
 
 	if (ecap_dev->enabled)
 		ecap_cnt_capture_disable(counter_dev);
-
-	return 0;
 }
 
 static int ecap_cnt_suspend(struct device *dev)
@@ -600,7 +598,7 @@ MODULE_DEVICE_TABLE(of, ecap_cnt_of_match);
 
 static struct platform_driver ecap_cnt_driver = {
 	.probe = ecap_cnt_probe,
-	.remove = ecap_cnt_remove,
+	.remove_new = ecap_cnt_remove,
 	.driver = {
 		.name = "ecap-capture",
 		.of_match_table = ecap_cnt_of_match,
-- 
2.43.0