linux-kernel - [PATCH 04/58] mmc: litex_mmc: Convert to platform remove callback returning void

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Date:   Thu, 13 Jul 2023 16:07:13 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Karol Gugala <kgugala@...micro.com>,
        Mateusz Holenko <mholenko@...micro.com>,
        Gabriel Somlo <gsomlo@...il.com>, Joel Stanley <joel@....id.au>
Cc:     Yangtao Li <frank.li@...o.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 04/58] mmc: litex_mmc: 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/litex_mmc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/litex_mmc.c b/drivers/mmc/host/litex_mmc.c
index 9af6b0902efe..4ec8072dc60b 100644
--- a/drivers/mmc/host/litex_mmc.c
+++ b/drivers/mmc/host/litex_mmc.c
@@ -629,12 +629,11 @@ static int litex_mmc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int litex_mmc_remove(struct platform_device *pdev)
+static void litex_mmc_remove(struct platform_device *pdev)
 {
 	struct litex_mmc_host *host = platform_get_drvdata(pdev);
 
 	mmc_remove_host(host->mmc);
-	return 0;
 }
 
 static const struct of_device_id litex_match[] = {
@@ -645,7 +644,7 @@ MODULE_DEVICE_TABLE(of, litex_match);
 
 static struct platform_driver litex_mmc_driver = {
 	.probe = litex_mmc_probe,
-	.remove = litex_mmc_remove,
+	.remove_new = litex_mmc_remove,
 	.driver = {
 		.name = "litex-mmc",
 		.of_match_table = litex_match,
-- 
2.39.0