diff mbox series

[46/97] usb: ehci-brcm: Convert to platform remove callback returning void

Message ID 20230517230239.187727-47-u.kleine-koenig@pengutronix.de (mailing list archive)
State Accepted
Commit 8ea6a6ab52295d9e8f8383f4deab7ec8f6e6f6b7
Headers show
Series usb: Convert to platform remove callback returning void | expand

Commit Message

Uwe Kleine-König May 17, 2023, 11:01 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/ehci-brcm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Comments

Florian Fainelli May 18, 2023, 10:48 p.m. UTC | #1
On 5/17/23 16:01, Uwe Kleine-König wrote:
> 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: Florian Fainelli <florian.fainelli@broadcom.com>
diff mbox series

Patch

diff --git a/drivers/usb/host/ehci-brcm.c b/drivers/usb/host/ehci-brcm.c
index 6a0f64c9e5e8..0362a082abb4 100644
--- a/drivers/usb/host/ehci-brcm.c
+++ b/drivers/usb/host/ehci-brcm.c
@@ -188,7 +188,7 @@  static int ehci_brcm_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int ehci_brcm_remove(struct platform_device *dev)
+static void ehci_brcm_remove(struct platform_device *dev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(dev);
 	struct brcm_priv *priv = hcd_to_ehci_priv(hcd);
@@ -196,7 +196,6 @@  static int ehci_brcm_remove(struct platform_device *dev)
 	usb_remove_hcd(hcd);
 	clk_disable_unprepare(priv->clk);
 	usb_put_hcd(hcd);
-	return 0;
 }
 
 static int __maybe_unused ehci_brcm_suspend(struct device *dev)
@@ -250,7 +249,7 @@  static const struct of_device_id brcm_ehci_of_match[] = {
 
 static struct platform_driver ehci_brcm_driver = {
 	.probe		= ehci_brcm_probe,
-	.remove		= ehci_brcm_remove,
+	.remove_new	= ehci_brcm_remove,
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver		= {
 		.name	= "ehci-brcm",