linux-kernel - [PATCH 3/4] w1: sgi_w1: Convert to platform remove callback returning void

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Date: Mon, 19 Feb 2024 21:28:36 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: kernel@...gutronix.de,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] w1: sgi_w1: 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/sgi_w1.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/w1/masters/sgi_w1.c b/drivers/w1/masters/sgi_w1.c
index d7fbc3c146e1..7bb7876aa70e 100644
--- a/drivers/w1/masters/sgi_w1.c
+++ b/drivers/w1/masters/sgi_w1.c
@@ -105,13 +105,11 @@ static int sgi_w1_probe(struct platform_device *pdev)
 /*
  * disassociate the w1 device from the driver
  */
-static int sgi_w1_remove(struct platform_device *pdev)
+static void sgi_w1_remove(struct platform_device *pdev)
 {
 	struct sgi_w1_device *sdev = platform_get_drvdata(pdev);

 	w1_remove_master_device(&sdev->bus_master);
-
-	return 0;
 }

 static struct platform_driver sgi_w1_driver = {
@@ -119,7 +117,7 @@ static struct platform_driver sgi_w1_driver = {
 		.name = "sgi_w1",
 	},
 	.probe = sgi_w1_probe,
-	.remove = sgi_w1_remove,
+	.remove_new = sgi_w1_remove,
 };
 module_platform_driver(sgi_w1_driver);

-- 
2.43.0