spi: at91-usart: 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.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230303172041.2103336-5-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-at91-usart.c b/drivers/spi/spi-at91-usart.c
index fab9d22..4fb3653 100644 (file)
--- a/drivers/spi/spi-at91-usart.c
+++ b/drivers/spi/spi-at91-usart.c
@@ -647,15 +647,13 @@ __maybe_unused static int at91_usart_spi_resume(struct device *dev)
        return spi_controller_resume(ctrl);
 }
 
-static int at91_usart_spi_remove(struct platform_device *pdev)
+static void at91_usart_spi_remove(struct platform_device *pdev)
 {
        struct spi_controller *ctlr = platform_get_drvdata(pdev);
        struct at91_usart_spi *aus = spi_controller_get_devdata(ctlr);
 
        at91_usart_spi_release_dma(ctlr);
        clk_disable_unprepare(aus->clk);
-
-       return 0;
 }
 
 static const struct dev_pm_ops at91_usart_spi_pm_ops = {
@@ -670,7 +668,7 @@ static struct platform_driver at91_usart_spi_driver = {
                .pm = &at91_usart_spi_pm_ops,
        },
        .probe = at91_usart_spi_probe,
-       .remove = at91_usart_spi_remove,
+       .remove_new = at91_usart_spi_remove,
 };
 
 module_platform_driver(at91_usart_spi_driver);