[PATCH] driver: net: can: delete napi if register_candev fails

[Dongliang Mu]

On Sun, Oct 17, 2021 at 8:36 PM Marc Kleine-Budde <mkl at pengutronix.de> wrote:
>
> On 13.10.2021 13:21:09, Dongliang Mu wrote:
> > On Wed, Oct 13, 2021 at 12:04 PM Dongliang Mu <mudongliangabcd at gmail.com> wrote:
> > >
> > > If register_candev fails, xcan_probe does not clean the napi
> > > created by netif_napi_add.
> > >
> >
> > It seems the netif_napi_del operation is done in the free_candev
> > (free_netdev precisely).
> >
> > list_for_each_entry_safe(p, n, &dev->napi_list, dev_list)
> >           netif_napi_del(p);
> >
> > And list_add_rcu(&napi->dev_list, &dev->napi_list) is done in the
> > netif_napi_add.
> >
> > Therefore, I suggest removing "netif_napi_del" operation in the
> > xcan_remove to match probe and remove function.
>
> Sounds reasonable, can you create a patch for this.

I have submitted one patch - https://lkml.org/lkml/2021/10/17/181

>
> regards,
> Marc
>
> --
> Pengutronix e.K.                 | Marc Kleine-Budde           |
> Embedded Linux                   | https://www.pengutronix.de  |
> Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
> Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |