Re: [PATCH] wifi: nl80211: don't WARN on a missing self-managed regdom

[Johannes Berg <johannes@sipsolutions.net>]

On Wed, 2026-10-07 at 17:18 +0200, Diederik de Haas wrote:
> On Wed Oct 7, 2026 at 4:55 PM CEST, Johannes Berg wrote:
> > On Tue, 2026-10-06 at 18:17 +0200, François Roux wrote:
> > > nl80211_get_reg_do() has a WARN_ON() for a self-managed wiphy without a
> > > private regdomain. Userspace can trigger it with a plain
> > > NL80211_CMD_GET_REG request.
> > > 
> > > Drivers can register such a wiphy first and set its regdomain later.
> > > ath12k, for example, calls ieee80211_register_hw() and only then applies
> > > the regdomain with ath12k_regd_update(). iwd queries the regdomain of a
> > > new wiphy as soon as it shows up, so it can hit that window at boot:
> > > 
> > >   WARNING: net/wireless/nl80211.c:10828 at nl80211_get_reg_do+0x1d0/0x1fc [cfg80211], CPU#5: iwd/721
> > 
> > I'm not a fan of this, I think the drivers should have the regdom ready.
> > 
> > > The same trace has been reported with an Intel BE200 (iwlwifi).
> > 
> > I _thought_ we fixed that issue.
> 
> If that fix is supposed to be in 7.3-rc6 (from Linus), then no.
> If that's a recent fix/patch which is f.e. slated for -next/7.4(-rc1),
> then can you point me to it? Happy to test it.

Well, it looks like it got *reverted*.

6895d74c11d8 ("wifi: iwlwifi: mld: initialize regulatory early")
f81aa834bfa9 ("wifi: iwlwifi: mld: Move regulatory domain initialization")

johannes