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From: "Luis R. Rodriguez" <mcgrof@gmail.com>
Date: Mon, 23 May 2011 14:42:53 -0700
Message-ID: <BANLkTinrM1oBfKUoCzs9_DOw+EmpW=ikig@mail.gmail.com> (sfid-20110523_234320_006853_A00D03B3)
Subject: Re: ath9k 9380: All 5Ghz channels flagged as passive-scanning
To: Ben Greear <greearb@candelatech.com>
Cc: Mohammed Shafi <shafi.wireless@gmail.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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On Mon, May 23, 2011 at 2:38 PM, Ben Greear <greearb@candelatech.com> wrote:
> On 05/23/2011 02:28 PM, Luis R. Rodriguez wrote:
>>
>> On Mon, May 23, 2011 at 2:19 PM, Ben Greear<greearb@candelatech.com>
>>  wrote:
>
>>> Since it *is* possible to start an AP on a channel with existing AP,
>>> I assume that the NIC must be able to handle this properly..or is
>>> that ability to start on a scanned channel just a bug?  (Please
>>> don't fix it, if it is :P)
>>
>> It a feature, AP functionality is allowed on that channel on a world
>> roaming card given that no CTL is present so the lower regulatory
>> value, from CRDA, is used instead of the CTL value.
>
> So as long as you have a functional CRDA and do not mis-represent
> your country with 'iw reg set',

Atheros cards have an EEPROM value for a regulatory domain which is
always used, regardless of what you tell cfg80211 with 'iw reg set',
'iw reg set' will just help compliance further.

> is there any way to
> actually get the system out of spec if you use "eeprom" reg-domain of 0x0?

No. You can only do this by trying to take the card out of compliance
purposely or unknowingly in software.

 Luis