ath9k DFS failed -16 (Device or resource busy)

[Zefir Kurtisi]

On 02/24/2016 05:10 PM, Benoit wrote:
> any 'howto' or similar I can find to help me compile the driver with the correct
> parameters?
> many thanks
> 
> On 02/22/2016 03:31 PM, Zefir Kurtisi wrote:
>> On 02/22/2016 12:13 PM, Janusz Dziedzic wrote:
>>> On 22 February 2016 at 09:25, Benoit<benoitne at gmail.com>  wrote:
>>>> Hi Janusz,
>>>> Without | grep radar as it doesn't match anything :
>>>>
>>> So, your driver is compiled without ATH9K_DFS_CERTIFIED.
>>>
>> ... which requires CFG80211_CERTIFICATION_ONUS to be set which is only available
>> in EXPERT mode.
>>
>>
> 

This should usually do:

* enable EXPERT mode:
- General setup  --->
  - Configure standard kernel features (expert users)

* enable CONFIG_CFG80211_CERTIFICATION_ONUS
- Networking support  --->
  - Wireless  --->
    - cfg80211 - wireless configuration API
      - cfg80211 certification onus


* set CONFIG_ATH9K_DFS_CERTIFIED
- Device Drivers  --->
  - Network device support  --->
    - Wireless LAN  --->
      - Atheros 802.11n wireless cards support
        - Atheros DFS support for certified platforms


Ensure that you read and understand the notes given for the options, in particular
you accept that you won't operate the device on DFS channels unless you certify it.


Good Luck