linux-kernel - [PATCH 2/4] w1: omap_hdq: Convert to platform remove callback returning void

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Message-ID:  <f3a7eaee59020bf879249304eaaf9839c7e17222.1708340114.git.u.kleine-koenig@pengutronix.de>
Date: Mon, 19 Feb 2024 11:59:28 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: kernel@...gutronix.de,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] w1: omap_hdq: 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/w1/masters/omap_hdq.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index 6a39b71eb718..d1cb5190445a 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -647,7 +647,7 @@ static int omap_hdq_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int omap_hdq_remove(struct platform_device *pdev)
+static void omap_hdq_remove(struct platform_device *pdev)
 {
 	int active;
 
@@ -661,8 +661,6 @@ static int omap_hdq_remove(struct platform_device *pdev)
 	if (active >= 0)
 		pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-
-	return 0;
 }
 
 static const struct of_device_id omap_hdq_dt_ids[] = {
@@ -674,7 +672,7 @@ MODULE_DEVICE_TABLE(of, omap_hdq_dt_ids);
 
 static struct platform_driver omap_hdq_driver = {
 	.probe = omap_hdq_probe,
-	.remove = omap_hdq_remove,
+	.remove_new = omap_hdq_remove,
 	.driver = {
 		.name =	"omap_hdq",
 		.of_match_table = omap_hdq_dt_ids,
-- 
2.43.0