linux-kernel - [PATCH 7/7] pcmcia: xxs1500_ss: Convert to platform remove callback returning void

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Message-ID:  <09a89926787cb9f64caa73c510f04d9f04a5136f.1702051073.git.u.kleine-koenig@pengutronix.de>
Date:   Fri,  8 Dec 2023 17:08:12 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Dominik Brodowski <linux@...inikbrodowski.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH 7/7] pcmcia: xxs1500_ss: 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/xxs1500_ss.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pcmcia/xxs1500_ss.c b/drivers/pcmcia/xxs1500_ss.c
index b11c7abb1dc0..2a93fbbd128d 100644
--- a/drivers/pcmcia/xxs1500_ss.c
+++ b/drivers/pcmcia/xxs1500_ss.c
@@ -301,7 +301,7 @@ static int xxs1500_pcmcia_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int xxs1500_pcmcia_remove(struct platform_device *pdev)
+static void xxs1500_pcmcia_remove(struct platform_device *pdev)
 {
 	struct xxs1500_pcmcia_sock *sock = platform_get_drvdata(pdev);
 
@@ -309,8 +309,6 @@ static int xxs1500_pcmcia_remove(struct platform_device *pdev)
 	free_irq(gpio_to_irq(GPIO_CDA), sock);
 	iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
 	kfree(sock);
-
-	return 0;
 }
 
 static struct platform_driver xxs1500_pcmcia_socket_driver = {
@@ -318,7 +316,7 @@ static struct platform_driver xxs1500_pcmcia_socket_driver = {
 		.name	= "xxs1500_pcmcia",
 	},
 	.probe		= xxs1500_pcmcia_probe,
-	.remove		= xxs1500_pcmcia_remove,
+	.remove_new	= xxs1500_pcmcia_remove,
 };
 
 module_platform_driver(xxs1500_pcmcia_socket_driver);
-- 
2.42.0