linux-kernel - [PATCH 05/11] mei: vsc: Convert to platform remove callback returning void

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Date: Wed, 21 Feb 2024 10:53:49 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: kernel@...gutronix.de,
	Tomas Winkler <tomas.winkler@...el.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 05/11] mei: vsc: 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/misc/mei/platform-vsc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/mei/platform-vsc.c b/drivers/misc/mei/platform-vsc.c
index 8d303c6c0000..6c9f00bcb94b 100644
--- a/drivers/misc/mei/platform-vsc.c
+++ b/drivers/misc/mei/platform-vsc.c
@@ -384,7 +384,7 @@ static int mei_vsc_probe(struct platform_device *pdev)
 	return ret;
 }

-static int mei_vsc_remove(struct platform_device *pdev)
+static void mei_vsc_remove(struct platform_device *pdev)
 {
 	struct mei_device *mei_dev = platform_get_drvdata(pdev);

@@ -395,8 +395,6 @@ static int mei_vsc_remove(struct platform_device *pdev)
 	mei_disable_interrupts(mei_dev);

 	mei_deregister(mei_dev);
-
-	return 0;
 }

 static int mei_vsc_suspend(struct device *dev)
@@ -433,7 +431,7 @@ MODULE_DEVICE_TABLE(platform, mei_vsc_id_table);

 static struct platform_driver mei_vsc_drv = {
 	.probe = mei_vsc_probe,
-	.remove = mei_vsc_remove,
+	.remove_new = mei_vsc_remove,
 	.id_table = mei_vsc_id_table,
 	.driver = {
 		.name = MEI_VSC_DRV_NAME,
-- 
2.43.0