On Tue, 2021-10-12 at 12:24 +0200, Nicolas Cavallari wrote: > > > > > > This patch somehow appears to break ath9k's eeprom hints and restrict > > > it to the world regulatory domain on v5.12.10. > > > > > > ath9k calls wiphy_apply_custom_regulatory() with its own kind of world > > > regulatory domain, before it decodes hints from the eeprom and uses > > > regulatory_hint() to request a specific alpha2. > > > > > > With this patch, applying the hint fails because wiphy->regd is already set. > > > If i revert this patch, ath9k works again. > > Hm. It stands to reason that perhaps ath9k should call wiphy_apply_custom_regulatory(NULL) (if that's possible) to reset the knowledge of having a custom regulatory domain, before requesting the correct one be applied by cfg80211 (and possibly even crda userspace). I can't really say that I think the patch itself is wrong, even if it caused this problem. johannes
