Hi,

Thanks for your detailed answer.

I made a detailed report, with dmesg outputs of different 
kernel/firmware-atheros and wireless-regdb combinations at 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=970679

Massimo Maggi pointed me to this ath10k issue on the last message.

Regards,

On 2020-10-22 23:28+0300, Jouni Malinen wrote:
>What is the exact issue you are seeing?
>
>> Is there something preventing
>>
>> https://patchwork.kernel.org/project/ath10k/patch/20200527165718.129307-1-briannorris@chromium.org/
>> from being merged?
>
>That seems to have a risk of mapping the default country code (CTRY_DEFAULT
>is defined to be 0 in regd.h) being mapped to something else than a safe
>world roaming case and this could have an impact throughout all drivers
>using the generic ath/regd.c implementation. It looks like the correct
>thing to do is to map an unexpected value to the safest option instead of
>allowing this to be mapped to something that could end up enabling
>incorrect regulatory rules.
>
>- Jouni

-- 
Félix