netdev - Re: [PATCH net-next 09/10] ieee802154: fakelb: Convert to platform remove callback returning void

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri, 17 Nov 2023 13:05:51 +0100
From: Stefan Schmidt <stefan@...enfreihafen.org>
To: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
 Alexander Aring <alex.aring@...il.com>,
 Miquel Raynal <miquel.raynal@...tlin.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: linux-wpan@...r.kernel.org, netdev@...r.kernel.org, kernel@...gutronix.de
Subject: Re: [PATCH net-next 09/10] ieee802154: fakelb: Convert to platform
 remove callback returning void

Hello.

On 17.11.23 10:59, 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() will be 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@...gutronix.de>
> ---
>   drivers/net/ieee802154/fakelb.c | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c
> index 523d13ee02bf..35e55f198e05 100644
> --- a/drivers/net/ieee802154/fakelb.c
> +++ b/drivers/net/ieee802154/fakelb.c
> @@ -221,7 +221,7 @@ static int fakelb_probe(struct platform_device *pdev)
>   	return err;
>   }
>   
> -static int fakelb_remove(struct platform_device *pdev)
> +static void fakelb_remove(struct platform_device *pdev)
>   {
>   	struct fakelb_phy *phy, *tmp;
>   
> @@ -229,14 +229,13 @@ static int fakelb_remove(struct platform_device *pdev)
>   	list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
>   		fakelb_del(phy);
>   	mutex_unlock(&fakelb_phys_lock);
> -	return 0;
>   }
>   
>   static struct platform_device *ieee802154fake_dev;
>   
>   static struct platform_driver ieee802154fake_driver = {
>   	.probe = fakelb_probe,
> -	.remove = fakelb_remove,
> +	.remove_new = fakelb_remove,
>   	.driver = {
>   			.name = "ieee802154fakelb",
>   	},


Acked-by: Stefan Schmidt <stefan@...enfreihafen.org>

regards
Stefan Schmidt