Re: [Intel-wired-lan] [PATCH iwl-next v4 3/5] ice: migrate to netdev ops lock

[Alexander Lobakin <aleksander.lobakin@intel.com>]

From: Kohei Enju <kohei@enjuk.jp>
Date: Thu, 19 Mar 2026 03:56:19 +0900

> On 03/19 02:55, Kohei Enju wrote:
>> On 03/18 17:35, Alexander Lobakin wrote:
>>> Queue management ops unconditionally enable netdev locking. The same
>>> lock is taken by default by several NAPI configuration functions,
>>> such as napi_enable() and netif_napi_set_irq().
>>> Request ops locking in advance and make sure we use the _locked
>>> counterparts of those functions to avoid deadlocks, taking the lock
>>> manually where needed (suspend/resume, queue rebuild and resets).
>>
>> Hi Alexander,


Uff, sorry, I didn't notice this thread for some reason. Maybe it landed
into the IWL folder in my mail client and I haven't checked it for some
time... But I read LKML online on a daily basis and missed this reports =\

>> After applying this patch (3/5) along with the preceding ones on top of
>> net-next, I got some WARNING splats when changing the admin state
>> (up/down) using the ip link command. [1, 2]
>>
>> Since I haven't looked into this series in detail, I'm reporting the
>> splats anyway. 
>> I'm wondering why I haven't seen anyone report this type of issue up to
>> v3. Maybe there is something wrong with my setup or devices?
>>
>> Device: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)
> 
> Ah, I think I figured out the reason. My adapter accidentally fell into
> safe mode. When the adapter is in the safe mode, netdev->queue_mgmt_ops
> == NULL and netdev->request_ops_lock == false, so
> netdev_assert_locked_or_invisible() complains about not holding the
> netdev lock.
> 
> Setting netdev->request_ops_lock = true in the safe mode path also
> worked fine for me.
> 
> ---
> diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
> index 9ef258d5ab48..3477c53316ba 100644
> --- a/drivers/net/ethernet/intel/ice/ice_main.c
> +++ b/drivers/net/ethernet/intel/ice/ice_main.c
> @@ -3519,6 +3519,7 @@ static void ice_set_ops(struct ice_vsi *vsi)
> 
>         if (ice_is_safe_mode(pf)) {
>                 netdev->netdev_ops = &ice_netdev_safe_mode_ops;
> +               netdev->request_ops_lock = true;

This fix looks good to me, thanks!

>                 ice_set_ethtool_safe_mode_ops(netdev);
>                 return;
>         }

Tony, could you please pick it up to patch 3/5 when sending a new PR?

Thanks,
Olek