| Message ID | b0488fa6181a47668e5737905ae7adc8d7cd055e.1701713943.git.u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net*: Convert to platform remove callback returning void | expand |
On Mon, Dec 4, 2023 at 7:31 PM Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 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() will be renamed to .remove(). > > Trivially convert this driver from always returning zero in the remove > callback to the void returning variant. > > Link: https://lore.kernel.org/r/20231117095922.876489-8-u.kleine-koenig@pengutronix.de > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c index b09f4c235142..931c5ca79ea5 100644 --- a/drivers/net/wan/ixp4xx_hss.c +++ b/drivers/net/wan/ixp4xx_hss.c @@ -1522,20 +1522,19 @@ static int ixp4xx_hss_probe(struct platform_device *pdev) return err; } -static int ixp4xx_hss_remove(struct platform_device *pdev) +static void ixp4xx_hss_remove(struct platform_device *pdev) { struct port *port = platform_get_drvdata(pdev); unregister_hdlc_device(port->netdev); free_netdev(port->netdev); npe_release(port->npe); - return 0; } static struct platform_driver ixp4xx_hss_driver = { .driver.name = DRV_NAME, .probe = ixp4xx_hss_probe, - .remove = ixp4xx_hss_remove, + .remove_new = ixp4xx_hss_remove, }; module_platform_driver(ixp4xx_hss_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() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Link: https://lore.kernel.org/r/20231117095922.876489-8-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> --- drivers/net/wan/ixp4xx_hss.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)