netdev - [PATCH net-next 22/22] can: xilinx: 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: <20230515205759.1003118-23-mkl@pengutronix.de>
Date: Mon, 15 May 2023 22:57:59 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 22/22] can: xilinx: Convert to platform remove callback returning void

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

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() is
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>
Link: https://lore.kernel.org/r/20230512212725.143824-20-u.kleine-koenig@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/xilinx_can.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index 43c812ea1de0..797c69a0314d 100644
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -1898,20 +1898,18 @@ static int xcan_probe(struct platform_device *pdev)
  * This function frees all the resources allocated to the device.
  * Return: 0 always
  */
-static int xcan_remove(struct platform_device *pdev)
+static void xcan_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 
 	unregister_candev(ndev);
 	pm_runtime_disable(&pdev->dev);
 	free_candev(ndev);
-
-	return 0;
 }
 
 static struct platform_driver xcan_driver = {
 	.probe = xcan_probe,
-	.remove	= xcan_remove,
+	.remove_new = xcan_remove,
 	.driver	= {
 		.name = DRIVER_NAME,
 		.pm = &xcan_dev_pm_ops,
-- 
2.39.2