linux-kernel - [PATCH 07/58] mmc: davinci_mmc: Convert to platform remove callback returning void

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Message-Id: <20230713080807.69999-7-frank.li@vivo.com>
Date:   Thu, 13 Jul 2023 16:07:16 +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-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 07/58] mmc: davinci_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/davinci_mmc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 7138dfa065bf..0a08b85e35b0 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1345,7 +1345,7 @@ static int davinci_mmcsd_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int __exit davinci_mmcsd_remove(struct platform_device *pdev)
+static void __exit davinci_mmcsd_remove(struct platform_device *pdev)
 {
 	struct mmc_davinci_host *host = platform_get_drvdata(pdev);
 
@@ -1354,8 +1354,6 @@ static int __exit davinci_mmcsd_remove(struct platform_device *pdev)
 	davinci_release_dma_channels(host);
 	clk_disable_unprepare(host->clk);
 	mmc_free_host(host->mmc);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -1402,7 +1400,7 @@ static struct platform_driver davinci_mmcsd_driver = {
 		.of_match_table = davinci_mmc_dt_ids,
 	},
 	.probe		= davinci_mmcsd_probe,
-	.remove		= __exit_p(davinci_mmcsd_remove),
+	.remove_new	= __exit_p(davinci_mmcsd_remove),
 	.id_table	= davinci_mmc_devtype,
 };
 
-- 
2.39.0