linux-kernel - [PATCH 3/8] regulator: db8500-prcmu: 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 for Android: free password hash cracker in your pocket

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

Message-ID:  <fcaa42d7dd707031ed8dd9e8c28483891b879965.1701778038.git.u.kleine-koenig@pengutronix.de>
Date:   Tue,  5 Dec 2023 13:26:18 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH 3/8] regulator: db8500-prcmu: 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/regulator/db8500-prcmu.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/db8500-prcmu.c b/drivers/regulator/db8500-prcmu.c
index 34c5e485d0af..1e2d54da1b9a 100644
--- a/drivers/regulator/db8500-prcmu.c
+++ b/drivers/regulator/db8500-prcmu.c
@@ -469,11 +469,9 @@ static int db8500_regulator_probe(struct platform_device *pdev)
 	return 0;
 }

-static int db8500_regulator_remove(struct platform_device *pdev)
+static void db8500_regulator_remove(struct platform_device *pdev)
 {
 	ux500_regulator_debug_exit();
-
-	return 0;
 }

 static struct platform_driver db8500_regulator_driver = {
@@ -482,7 +480,7 @@ static struct platform_driver db8500_regulator_driver = {
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe = db8500_regulator_probe,
-	.remove = db8500_regulator_remove,
+	.remove_new = db8500_regulator_remove,
 };

 static int __init db8500_regulator_init(void)
-- 
2.42.0