linux-kernel - [PATCH 5/7] pcmcia: pxa2xx: Convert to platform remove callback returning void

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Date:   Fri,  8 Dec 2023 17:08:10 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Dominik Brodowski <linux@...inikbrodowski.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 5/7] pcmcia: pxa2xx: 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/pcmcia/pxa2xx_base.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pcmcia/pxa2xx_base.c b/drivers/pcmcia/pxa2xx_base.c
index 5254028354f4..457fb81b497a 100644
--- a/drivers/pcmcia/pxa2xx_base.c
+++ b/drivers/pcmcia/pxa2xx_base.c
@@ -313,15 +313,13 @@ static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
 	return ret;
 }
 
-static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
+static void pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
 {
 	struct skt_dev_info *sinfo = platform_get_drvdata(dev);
 	int i;
 
 	for (i = 0; i < sinfo->nskt; i++)
 		soc_pcmcia_remove_one(&sinfo->skt[i]);
-
-	return 0;
 }
 
 static int pxa2xx_drv_pcmcia_resume(struct device *dev)
@@ -338,7 +336,7 @@ static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
 
 static struct platform_driver pxa2xx_pcmcia_driver = {
 	.probe		= pxa2xx_drv_pcmcia_probe,
-	.remove		= pxa2xx_drv_pcmcia_remove,
+	.remove_new	= pxa2xx_drv_pcmcia_remove,
 	.driver		= {
 		.name	= "pxa2xx-pcmcia",
 		.pm	= &pxa2xx_drv_pcmcia_pm_ops,
-- 
2.42.0