dmaengine: sh: rcar-dmac: 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 ignored (apart
from emitting a warning) 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. Eventually after all drivers
are converted, .remove_new() is renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230919133207.1400430-40-u.kleine-koenig@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 641d689d17ff189b485ca54673812aeb7976292a..40482cb73d798ac15d24fa1aa1a94ea0c2ee2723 100644 (file)
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1990,7 +1990,7 @@ err_pm_disable:
        return ret;
 }
 
-static int rcar_dmac_remove(struct platform_device *pdev)
+static void rcar_dmac_remove(struct platform_device *pdev)
 {
        struct rcar_dmac *dmac = platform_get_drvdata(pdev);
 
@@ -1998,8 +1998,6 @@ static int rcar_dmac_remove(struct platform_device *pdev)
        dma_async_device_unregister(&dmac->engine);
 
        pm_runtime_disable(&pdev->dev);
-
-       return 0;
 }
 
 static void rcar_dmac_shutdown(struct platform_device *pdev)
@@ -2041,7 +2039,7 @@ static struct platform_driver rcar_dmac_driver = {
                .of_match_table = rcar_dmac_of_ids,
        },
        .probe          = rcar_dmac_probe,
-       .remove         = rcar_dmac_remove,
+       .remove_new     = rcar_dmac_remove,
        .shutdown       = rcar_dmac_shutdown,
 };