linux-kernel - [PATCH 07/13] irqchip/mvebu-pic: Convert to platform remove callback returning void

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID:  <df977ad4c02ff913b01cdd6c348e7fae3e08e651.1703284359.git.u.kleine-koenig@pengutronix.de>
Date: Fri, 22 Dec 2023 23:50:38 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...tlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	kernel@...gutronix.de
Subject: [PATCH 07/13] irqchip/mvebu-pic: 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/irqchip/irq-mvebu-pic.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/irqchip/irq-mvebu-pic.c b/drivers/irqchip/irq-mvebu-pic.c
index ef3d3646ccc2..57e3f99b61f5 100644
--- a/drivers/irqchip/irq-mvebu-pic.c
+++ b/drivers/irqchip/irq-mvebu-pic.c
@@ -167,14 +167,12 @@ static int mvebu_pic_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int mvebu_pic_remove(struct platform_device *pdev)
+static void mvebu_pic_remove(struct platform_device *pdev)
 {
 	struct mvebu_pic *pic = platform_get_drvdata(pdev);
 
 	on_each_cpu(mvebu_pic_disable_percpu_irq, pic, 1);
 	irq_domain_remove(pic->domain);
-
-	return 0;
 }
 
 static const struct of_device_id mvebu_pic_of_match[] = {
@@ -185,7 +183,7 @@ MODULE_DEVICE_TABLE(of, mvebu_pic_of_match);
 
 static struct platform_driver mvebu_pic_driver = {
 	.probe  = mvebu_pic_probe,
-	.remove = mvebu_pic_remove,
+	.remove_new = mvebu_pic_remove,
 	.driver = {
 		.name = "mvebu-pic",
 		.of_match_table = mvebu_pic_of_match,
-- 
2.42.0