On Sun, Oct 17, 2021 at 8:36 PM Marc Kleine-Budde [off-list ref] wrote:

On 13.10.2021 13:21:09, Dongliang Mu wrote:

quoted

On Wed, Oct 13, 2021 at 12:04 PM Dongliang Mu [off-list ref] wrote:

quoted

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

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