Re: [PATCH net] net: airoha: Fix schedule while atomic in airoha_ppe_deinit()

Jakub Kicinski
2026-01-04T17:58:02Z

On Tue, 23 Dec 2025 22:56:44 +0100 Lorenzo Bianconi wrote:
> Rely on rcu_replace_pointer in airoha_ppe_deinit routine in order to fix
> schedule while atomic issue.

The information in the commit message is not sufficient.
What "schedule while atomic issue"?

> - npu = rcu_dereference(eth->npu);
> + mutex_lock(&flow_offload_mutex);
> +
> + npu = rcu_replace_pointer(eth->npu, NULL,
> + lockdep_is_held(&flow_offload_mutex));
> if (npu) {
> npu->ops.ppe_deinit(npu);
> airoha_npu_put(npu);
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