Hi Arend, Sorry for the long delay. > I bumped into use of wdev_lock() again with 802.1X 4-way-hs offload > stuff. So for .set_pmk() and .del_pmk() it takes wdev_lock(). Is > there a rule of thumb when this lock is needed. What is it > protecting in general and in the case of pmk configuration. No, unfortunately it's not very well defined. One thing that drove this is that mac80211 (and perhaps some full-mac drivers) uses the same lock to prevent races between their own and cfg80211's state. So some of the locking is driven by that as well. I think it may have been done here just for consistency with other calls. johannes
