| Message ID | 20230918195102.1302746-4-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: mdio: Convert to platform remove callback returning void | expand |
On 9/18/23 12:50, 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 --git a/drivers/net/mdio/mdio-bcm-unimac.c b/drivers/net/mdio/mdio-bcm-unimac.c index 6b26a0803696..e8cd8eef319b 100644 --- a/drivers/net/mdio/mdio-bcm-unimac.c +++ b/drivers/net/mdio/mdio-bcm-unimac.c @@ -296,15 +296,13 @@ static int unimac_mdio_probe(struct platform_device *pdev) return ret; } -static int unimac_mdio_remove(struct platform_device *pdev) +static void unimac_mdio_remove(struct platform_device *pdev) { struct unimac_mdio_priv *priv = platform_get_drvdata(pdev); mdiobus_unregister(priv->mii_bus); mdiobus_free(priv->mii_bus); clk_disable_unprepare(priv->clk); - - return 0; } static int __maybe_unused unimac_mdio_suspend(struct device *d) @@ -353,7 +351,7 @@ static struct platform_driver unimac_mdio_driver = { .pm = &unimac_mdio_pm_ops, }, .probe = unimac_mdio_probe, - .remove = unimac_mdio_remove, + .remove_new = unimac_mdio_remove, }; module_platform_driver(unimac_mdio_driver);
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/net/mdio/mdio-bcm-unimac.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)