linux-kernel - Re: WARNING at net/wireless/reg.c when wireless network is disconnected

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Date:	Wed, 04 Aug 2010 16:28:28 +0200
From:	Thomas Bächler <thomas@...hlinux.org>
To:	"John W. Linville" <linville@...driver.com>
CC:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	Johannes Berg <johannes@...solutions.net>,
	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Subject: Re: WARNING at net/wireless/reg.c when wireless network is disconnected

Am 04.08.2010 15:49, schrieb John W. Linville:
> On Wed, Aug 04, 2010 at 01:36:23PM +0200, Thomas Bächler wrote:
>> Hello,
>>
>> this warning has been around ever since I switched to 2.6.34, has
>> accompanied me through the 2.6.35-rc* phase and is still there with
>> 2.6.35. I didn't bother to report it so far, as there seems to be no harm.
>>
>> Whenever I disconnect/get disconnected from the wireless, I receive the
>> below warning:
>>
>> ------------[ cut here ]------------
>> WARNING: at net/wireless/reg.c:272
>> regulatory_hint_disconnect+0x1b3/0x230 [cfg80211]()
>> Hardware name: TECRA A11
>> Unexpected user alpha2: de
> 
> Perhaps you need to set the regdomain as "DE" rather than "de"?
> 
> John

You are actually right. I did set it to "DE" with iw, but wpa_supplicant
had a setting country="de". I just fixed that and will soon see if the
problem disappears.

Still, the warning shouldn't look like a bad kernel bug, but rather an
advisory to the user to set something sane. What confuses me even more
is that this has been set to DE afterwards:

$ dmesg | grep cfg80211:\ Calling\ CRDA
cfg80211: Calling CRDA to update world regulatory domain
cfg80211: Calling CRDA for country: de
cfg80211: Calling CRDA for country: DE
cfg80211: Calling CRDA to update world regulatory domain
cfg80211: Calling CRDA for country: DE
cfg80211: Calling CRDA to update world regulatory domain
cfg80211: Calling CRDA for country: DE
cfg80211: Calling CRDA to update world regulatory domain
cfg80211: Calling CRDA for country: DE
cfg80211: Calling CRDA to update world regulatory domain
cfg80211: Calling CRDA for country: DE
cfg80211: Calling CRDA to update world regulatory domain
cfg80211: Calling CRDA for country: DE

The AP has been playing with the regdom as well, I lost track of what
has been set where in this mess.


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