linux-kernel - [PATCH 30/58] mmc: cavium-octeon: Convert to platform remove callback returning void

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Message-Id: <20230713080807.69999-30-frank.li@vivo.com>
Date:   Thu, 13 Jul 2023 16:07:39 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Robert Richter <rric@...nel.org>,
        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 30/58] mmc: cavium-octeon: 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/cavium-octeon.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/cavium-octeon.c b/drivers/mmc/host/cavium-octeon.c
index 12dca91a8ef6..d526868b30f6 100644
--- a/drivers/mmc/host/cavium-octeon.c
+++ b/drivers/mmc/host/cavium-octeon.c
@@ -294,7 +294,7 @@ static int octeon_mmc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int octeon_mmc_remove(struct platform_device *pdev)
+static void octeon_mmc_remove(struct platform_device *pdev)
 {
 	struct cvm_mmc_host *host = platform_get_drvdata(pdev);
 	u64 dma_cfg;
@@ -309,7 +309,6 @@ static int octeon_mmc_remove(struct platform_device *pdev)
 	writeq(dma_cfg, host->dma_base + MIO_EMM_DMA_CFG(host));
 
 	octeon_mmc_set_shared_power(host, 0);
-	return 0;
 }
 
 static const struct of_device_id octeon_mmc_match[] = {
@@ -325,7 +324,7 @@ MODULE_DEVICE_TABLE(of, octeon_mmc_match);
 
 static struct platform_driver octeon_mmc_driver = {
 	.probe		= octeon_mmc_probe,
-	.remove		= octeon_mmc_remove,
+	.remove_new	= octeon_mmc_remove,
 	.driver		= {
 		.name	= KBUILD_MODNAME,
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
-- 
2.39.0