linux-kernel - [PATCH 48/58] mmc: wmt-sdmmc: Convert to platform remove callback returning void

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Date:   Thu, 13 Jul 2023 16:07:57 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Yangtao Li <frank.li@...o.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 48/58] mmc: wmt-sdmmc: 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/wmt-sdmmc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index 68525d900046..74c475d071b7 100644
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -880,7 +880,7 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int wmt_mci_remove(struct platform_device *pdev)
+static void wmt_mci_remove(struct platform_device *pdev)
 {
 	struct mmc_host *mmc;
 	struct wmt_mci_priv *priv;
@@ -918,8 +918,6 @@ static int wmt_mci_remove(struct platform_device *pdev)
 	mmc_free_host(mmc);
 
 	dev_info(&pdev->dev, "WMT MCI device removed\n");
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -989,7 +987,7 @@ static const struct dev_pm_ops wmt_mci_pm = {
 
 static struct platform_driver wmt_mci_driver = {
 	.probe = wmt_mci_probe,
-	.remove = wmt_mci_remove,
+	.remove_new = wmt_mci_remove,
 	.driver = {
 		.name = DRIVER_NAME,
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
-- 
2.39.0