We have multiple reports for iwlwifi firmware crashes where net80211
logged:
ieee80211_sta_join: BSS xx:xx:xx:xx:xx:xx: 2GHz channel, VHT info; ignoring
Make sure when we sync from net80211 or set state that we only do
VHT if we are on the 5Ghz band. This change is likely helpful
whether it fixes the originally reported problems or not.
Sponsored by: The FreeBSD Foundation
Reported by: Jonathan Vasquez (jon xyinn.org)
Reported by: Michael Butler (imb protected-networks.net)
Reported by: others (fw crash w/o net80211 logging)
MFC after: 3 days