Re: [PATCH net v4 v4 1/3] macsec: introduce dedicated workqueue for SA crypto cleanup

[Sabrina Dubroca <sd@queasysnail.net>]

2026-05-11, 23:30:58 +0800, alexjlzheng@gmail.com wrote:
> From: Jinliang Zheng <alexjlzheng@tencent.com>
> 
> Introduce a dedicated ordered workqueue, macsec_wq, which will be used
> by subsequent patches to defer SA crypto cleanup (crypto_free_aead and
> related teardown) out of softirq context.
> 
> Using a dedicated workqueue instead of system_wq allows macsec_exit()
> to drain exactly the work items belonging to this module via
> destroy_workqueue(), without interfering with unrelated work items on
> system_wq or causing unexpected delays elsewhere.
> 
> rcu_barrier() in macsec_exit() ensures all in-flight rcu_work callbacks
> have enqueued their work items before destroy_workqueue() drains and
> destroys the queue, making the two-step teardown correct and complete.
> The same sequence is kept in the error path of macsec_init() as a
> precaution, to mirror macsec_exit() and stay safe if work ever becomes
> queueable before this point in the future.
> 
> While at it, rename the error labels in macsec_init() from the
> resource-named style (rtnl:, notifier:, wq:) to the err_xxx: style
> (err_rtnl:, err_notifier:, err_destroy_wq:) to align with the broader
> kernel convention.
> 
> Signed-off-by: Jinliang Zheng <alexjlzheng@tencent.com>
> ---
>  drivers/net/macsec.c | 23 ++++++++++++++++++-----
>  1 file changed, 18 insertions(+), 5 deletions(-)

Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>

Thanks for the fixes!

-- 
Sabrina