linux-kernel - [PATCH 17/40] soc/pxa: ssp: Convert to platform remove callback returning void

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Message-Id: <20230925095532.1984344-18-u.kleine-koenig@pengutronix.de>
Date:   Mon, 25 Sep 2023 11:55:08 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Arnd Bergmann <arnd@...db.de>,
        zhang songyi <zhang.songyi@....com.cn>,
        Lubomir Rintel <lkundrak@...sk>, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH 17/40] soc/pxa: ssp: 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/soc/pxa/ssp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/pxa/ssp.c b/drivers/soc/pxa/ssp.c
index bd029e838241..a1e8a07f7275 100644
--- a/drivers/soc/pxa/ssp.c
+++ b/drivers/soc/pxa/ssp.c
@@ -176,15 +176,13 @@ static int pxa_ssp_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int pxa_ssp_remove(struct platform_device *pdev)
+static void pxa_ssp_remove(struct platform_device *pdev)
 {
 	struct ssp_device *ssp = platform_get_drvdata(pdev);
 
 	mutex_lock(&ssp_lock);
 	list_del(&ssp->node);
 	mutex_unlock(&ssp_lock);
-
-	return 0;
 }
 
 static const struct platform_device_id ssp_id_table[] = {
@@ -199,7 +197,7 @@ static const struct platform_device_id ssp_id_table[] = {
 
 static struct platform_driver pxa_ssp_driver = {
 	.probe		= pxa_ssp_probe,
-	.remove		= pxa_ssp_remove,
+	.remove_new	= pxa_ssp_remove,
 	.driver		= {
 		.name		= "pxa2xx-ssp",
 		.of_match_table	= of_match_ptr(pxa_ssp_of_ids),
-- 
2.40.1