[PATCH v3 41/62] mmc: dw_mmc: rockchip: Convert to platform remove callback returning void

[PATCH v3 41/62] mmc: dw_mmc: rockchip: Convert to platform remove callback returning void

[Yangtao Li]

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@pengutronix.de>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/mmc/host/dw_mmc-rockchip.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 2a99f15f527f..b07190ba4b7a 100644
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -371,15 +371,13 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int dw_mci_rockchip_remove(struct platform_device *pdev)
+static void dw_mci_rockchip_remove(struct platform_device *pdev)
 {
 	pm_runtime_get_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	pm_runtime_put_noidle(&pdev->dev);
 
 	dw_mci_pltfm_remove(pdev);
-
-	return 0;
 }
 
 static const struct dev_pm_ops dw_mci_rockchip_dev_pm_ops = {
@@ -392,7 +390,7 @@ static const struct dev_pm_ops dw_mci_rockchip_dev_pm_ops = {
 
 static struct platform_driver dw_mci_rockchip_pltfm_driver = {
 	.probe		= dw_mci_rockchip_probe,
-	.remove		= dw_mci_rockchip_remove,
+	.remove_new	= dw_mci_rockchip_remove,
 	.driver		= {
 		.name		= "dwmmc_rockchip",
 		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
-- 
2.39.0


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Re: [PATCH v3 41/62] mmc: dw_mmc: rockchip: Convert to platform remove callback returning void

[Heiko Stuebner]

Am Donnerstag, 27. Juli 2023, 09:00:30 CEST schrieb Yangtao Li:
> 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@pengutronix.de>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Acked-by: Heiko Stuebner <heiko@sntech.de>



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