linux-kernel - [PATCH 25/58] mmc: uniphier-sd: Convert to platform remove callback returning void

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Message-Id: <20230713080807.69999-25-frank.li@vivo.com>
Date:   Thu, 13 Jul 2023 16:07:34 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Yangtao Li <frank.li@...o.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-mmc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 25/58]  mmc: uniphier-sd: 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 (mostly) ignored
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.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 drivers/mmc/host/uniphier-sd.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c
index 61acd69fac0e..33a4d1c6ef04 100644
--- a/drivers/mmc/host/uniphier-sd.c
+++ b/drivers/mmc/host/uniphier-sd.c
@@ -727,15 +727,13 @@ static int uniphier_sd_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int uniphier_sd_remove(struct platform_device *pdev)
+static void uniphier_sd_remove(struct platform_device *pdev)
 {
 	struct tmio_mmc_host *host = platform_get_drvdata(pdev);
 
 	tmio_mmc_host_remove(host);
 	uniphier_sd_clk_disable(host);
 	tmio_mmc_host_free(host);
-
-	return 0;
 }
 
 static const struct of_device_id uniphier_sd_match[] = {
@@ -757,7 +755,7 @@ MODULE_DEVICE_TABLE(of, uniphier_sd_match);
 
 static struct platform_driver uniphier_sd_driver = {
 	.probe = uniphier_sd_probe,
-	.remove = uniphier_sd_remove,
+	.remove_new = uniphier_sd_remove,
 	.driver = {
 		.name = "uniphier-sd",
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
-- 
2.39.0