diff mbox series

[82/97] usb: xhci-mtk: Convert to platform remove callback returning void

Message ID 20230517230239.187727-83-u.kleine-koenig@pengutronix.de (mailing list archive)
State Accepted
Commit d89dfff5eaebc888d9acc6ff1021a33a99d43136
Headers show
Series usb: Convert to platform remove callback returning void | expand

Commit Message

Uwe Kleine-König May 17, 2023, 11:02 p.m. UTC
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>
---
 drivers/usb/host/xhci-mtk.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

AngeloGioacchino Del Regno May 18, 2023, 9:35 a.m. UTC | #1
Il 18/05/23 01:02, 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 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>

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

Patch

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 90cf40d6d0c3..8d9a55b0281b 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -673,7 +673,7 @@  static int xhci_mtk_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int xhci_mtk_remove(struct platform_device *pdev)
+static void xhci_mtk_remove(struct platform_device *pdev)
 {
 	struct xhci_hcd_mtk *mtk = platform_get_drvdata(pdev);
 	struct usb_hcd	*hcd = mtk->hcd;
@@ -703,8 +703,6 @@  static int xhci_mtk_remove(struct platform_device *pdev)
 	pm_runtime_disable(dev);
 	pm_runtime_put_noidle(dev);
 	pm_runtime_set_suspended(dev);
-
-	return 0;
 }
 
 static int __maybe_unused xhci_mtk_suspend(struct device *dev)
@@ -824,7 +822,7 @@  MODULE_DEVICE_TABLE(of, mtk_xhci_of_match);
 
 static struct platform_driver mtk_xhci_driver = {
 	.probe	= xhci_mtk_probe,
-	.remove	= xhci_mtk_remove,
+	.remove_new = xhci_mtk_remove,
 	.driver	= {
 		.name = "xhci-mtk",
 		.pm = DEV_PM_OPS,