dmaengine: mmp_tdma: 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/20230919133207.1400430-27-u.kleine-koenig@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index d49fa6bc677592f24c50b5913c55a2843c77febf..f039e07181f7a9067dcf65b7e2846374f88db020 100644 (file)
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -552,12 +552,10 @@ static void mmp_tdma_issue_pending(struct dma_chan *chan)
        mmp_tdma_enable_chan(tdmac);
 }
 
-static int mmp_tdma_remove(struct platform_device *pdev)
+static void mmp_tdma_remove(struct platform_device *pdev)
 {
        if (pdev->dev.of_node)
                of_dma_controller_free(pdev->dev.of_node);
-
-       return 0;
 }
 
 static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
@@ -753,7 +751,7 @@ static struct platform_driver mmp_tdma_driver = {
        },
        .id_table       = mmp_tdma_id_table,
        .probe          = mmp_tdma_probe,
-       .remove         = mmp_tdma_remove,
+       .remove_new     = mmp_tdma_remove,
 };
 
 module_platform_driver(mmp_tdma_driver);