Bug#621737: linux-image-2.6.32-5-powerpc: ath ignores regulatory domain setting
Hi
On Sunday 10 April 2011, Anton Ivanov wrote:
> On 04/10/11 00:55, Ben Hutchings wrote:
> > On Fri, 2011-04-08 at 13:39 +0100, Anton Ivanov wrote:
[...]
> >> ath driver ignores reg domain setting passed via cfg80211 and uses one
> >> from EEPROM instead. This setting a lot of cheap cards is CN. As a result
> >> the reg domain is set incorrectly (and for some countries illegally).
[...]
> > What do you mean by 'passed via cfg80211'? Are you setting the
> > ieee80211_regdom module parameter?
[...]
> Yes. No effect. ath still reads from eeprom.
The EEPROM settings are authoritative, you can only restrict the
regulatory settings further to aid regulatory compliance in different
regions, but never relax them. Tools like crda always intersect the
EEPROM's (OTP in newer chipset generations) with the chosen regulatory
domain as provided by wireless-regdb or the in-kernel regdb; regulatory
hints like IEEE 802.11d may also restrict the allowed frequencies even
further.
http://wireless.kernel.org/en/users/Drivers/ath#Regulatory
This is intended beaviour and required for FCC compliance (keep in mind
that calibration data is also only validated for the given regdomain),
not a bug.
Regards
Stefan Lippers-Hollmann
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