linux-kernel - [PATCH 43/58] mmc: owl: Convert to platform remove callback returning void

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Message-Id: <20230713080807.69999-43-frank.li@vivo.com>
Date:   Thu, 13 Jul 2023 16:07:52 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Andreas Färber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...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-actions@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 43/58] mmc: owl: 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/owl-mmc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/owl-mmc.c b/drivers/mmc/host/owl-mmc.c
index 1bf22b08b373..a13bec42554a 100644
--- a/drivers/mmc/host/owl-mmc.c
+++ b/drivers/mmc/host/owl-mmc.c
@@ -667,7 +667,7 @@ static int owl_mmc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int owl_mmc_remove(struct platform_device *pdev)
+static void owl_mmc_remove(struct platform_device *pdev)
 {
 	struct mmc_host	*mmc = platform_get_drvdata(pdev);
 	struct owl_mmc_host *owl_host = mmc_priv(mmc);
@@ -676,8 +676,6 @@ static int owl_mmc_remove(struct platform_device *pdev)
 	disable_irq(owl_host->irq);
 	dma_release_channel(owl_host->dma);
 	mmc_free_host(mmc);
-
-	return 0;
 }
 
 static const struct of_device_id owl_mmc_of_match[] = {
@@ -693,7 +691,7 @@ static struct platform_driver owl_mmc_driver = {
 		.of_match_table = owl_mmc_of_match,
 	},
 	.probe		= owl_mmc_probe,
-	.remove		= owl_mmc_remove,
+	.remove_new	= owl_mmc_remove,
 };
 module_platform_driver(owl_mmc_driver);
 
-- 
2.39.0