在 2021/7/23 17:25, Dongliang Mu 写道: > Can you point out the concrete code releasing regd? Maybe the link to elixir. > >>> ieee80211_unregister_hw(data->hw); >>> device_release_driver(data->dev); >>> device_unregister(data->dev); >>> call graph seems like this: ieee80211_unregister_hw (https://elixir.bootlin.com/linux/v5.14-rc2/source/net/mac80211/main.c#L1368) wiphy_unregister (https://elixir.bootlin.com/linux/v5.14-rc2/source/net/wireless/core.c#L1011) wiphy_regulatory_deregister (https://elixir.bootlin.com/linux/v5.14-rc2/source/net/wireless/reg.c#L4057) rcu_free_regdom