linux-kernel - [PATCH 03/12] bus: omap_l3_smx: Convert to platform remove callback returning void

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Message-ID: <20231109202830.4124591-4-u.kleine-koenig@pengutronix.de>
Date:   Thu,  9 Nov 2023 21:28:33 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Rob Herring <robh@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Tony Lindgren <tony@...mide.com>,
        "Sicelo A. Mhlongo" <absicsz@...il.com>
Cc:     linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH 03/12] bus: omap_l3_smx: 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/bus/omap_l3_smx.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/bus/omap_l3_smx.c b/drivers/bus/omap_l3_smx.c
index 31774648be9d..ee6d29925e4d 100644
--- a/drivers/bus/omap_l3_smx.c
+++ b/drivers/bus/omap_l3_smx.c
@@ -261,7 +261,7 @@ static int omap3_l3_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int omap3_l3_remove(struct platform_device *pdev)
+static void omap3_l3_remove(struct platform_device *pdev)
 {
 	struct omap3_l3         *l3 = platform_get_drvdata(pdev);
 
@@ -269,13 +269,11 @@ static int omap3_l3_remove(struct platform_device *pdev)
 	free_irq(l3->debug_irq, l3);
 	iounmap(l3->rt);
 	kfree(l3);
-
-	return 0;
 }
 
 static struct platform_driver omap3_l3_driver = {
 	.probe		= omap3_l3_probe,
-	.remove         = omap3_l3_remove,
+	.remove_new     = omap3_l3_remove,
 	.driver         = {
 		.name   = "omap_l3_smx",
 		.of_match_table = of_match_ptr(omap3_l3_match),
-- 
2.42.0