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>
---
 drivers/spmi/spmi-mtk-pmif.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
index ad511f2c3324..fbcb3921e70c 100644
--- a/drivers/spmi/spmi-mtk-pmif.c
+++ b/drivers/spmi/spmi-mtk-pmif.c
@@ -503,7 +503,7 @@ static int mtk_spmi_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int mtk_spmi_remove(struct platform_device *pdev)
+static void mtk_spmi_remove(struct platform_device *pdev)
 {
 	struct spmi_controller *ctrl = platform_get_drvdata(pdev);
 	struct pmif *arb = spmi_controller_get_drvdata(ctrl);
@@ -511,7 +511,6 @@ static int mtk_spmi_remove(struct platform_device *pdev)
 	clk_bulk_disable_unprepare(arb->nclks, arb->clks);
 	spmi_controller_remove(ctrl);
 	spmi_controller_put(ctrl);
-	return 0;
 }
 
 static const struct of_device_id mtk_spmi_match_table[] = {
@@ -533,7 +532,7 @@ static struct platform_driver mtk_spmi_driver = {
 		.of_match_table = of_match_ptr(mtk_spmi_match_table),
 	},
 	.probe		= mtk_spmi_probe,
-	.remove		= mtk_spmi_remove,
+	.remove_new	= mtk_spmi_remove,
 };
 module_platform_driver(mtk_spmi_driver);
 
-- 
2.39.1

Quoting Uwe Kleine-König (2023-03-05 23:34:45)
> 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>
> ---

Applied to spmi-next

Il 06/03/23 08:34, Uwe Kleine-König ha scritto:
> 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>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>