Re: [PATCH] io_uring/zcrx: reject netdevices without ops lock support

[Mina Almasry]

On Wed, Aug 5, 2026 at 7:00 AM <pavankumaryalagada@xxxxxxxxx> wrote:
>
> From: Yalagada Pavan Kumar <pavankumaryalagada@xxxxxxxxx>
>
> zcrx registration can fail for netdevices that do not support the
> required ops locking model.
>
> netdev_queue_get_dma_dev() requires ops locking support.
> Calling it for devices without ops lock support triggers
> netdev_assert_locked_ops_compat().
>

Ha! netif_mp_open_rxq() does check for the ops locking support, but
get_dma_dev runs before netif_mpu_open_rxq. I would prefer a fix that
doesn't require every caller to add this check. Maybe make the
function return -EOPNOTSUPP instead of asserting? Or changing the call
sequence so that netif_mp_open_rxq is called before get_dma_dev()?
Pavel?
-- 
Thanks,
Mina