linux-kernel - [PATCH 50/58] mmc: sunplus-mmc: Convert to platform remove callback returning void

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Message-Id: <20230713080807.69999-50-frank.li@vivo.com>
Date:   Thu, 13 Jul 2023 16:07:59 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Tony Huang <tonyhuang.sunplus@...il.com>,
        Li-hao Kuo <lhjeff911@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
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 50/58] mmc: sunplus-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/sunplus-mmc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/sunplus-mmc.c b/drivers/mmc/host/sunplus-mmc.c
index db5e0dcdfa7f..a15371e98fd9 100644
--- a/drivers/mmc/host/sunplus-mmc.c
+++ b/drivers/mmc/host/sunplus-mmc.c
@@ -938,7 +938,7 @@ static int spmmc_drv_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int spmmc_drv_remove(struct platform_device *dev)
+static void spmmc_drv_remove(struct platform_device *dev)
 {
 	struct spmmc_host *host = platform_get_drvdata(dev);
 
@@ -949,8 +949,6 @@ static int spmmc_drv_remove(struct platform_device *dev)
 	pm_runtime_disable(&dev->dev);
 	platform_set_drvdata(dev, NULL);
 	mmc_free_host(host->mmc);
-
-	return 0;
 }
 
 static int spmmc_pm_runtime_suspend(struct device *dev)
@@ -985,7 +983,7 @@ MODULE_DEVICE_TABLE(of, spmmc_of_table);
 
 static struct platform_driver spmmc_driver = {
 	.probe = spmmc_drv_probe,
-	.remove = spmmc_drv_remove,
+	.remove_new = spmmc_drv_remove,
 	.driver = {
 		.name = "spmmc",
 		.pm = pm_ptr(&spmmc_pm_ops),
-- 
2.39.0