nl80211: disallow user requests prior to regulatory_init()
If cfg80211 is built into the kernel there is perhaps a small time window betwen nl80211_init() and regulatory_init() where cfg80211_regdomain hasn't yet been initialized to let the wireless core do its work. During that rare case and time frame (if its even possible) we don't allow user regulatory changes as cfg80211 is working on enabling its first regulatory domain. To check for cfg80211_regdomain we now contend the entire operation using the cfg80211_mutex. Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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