B43_BFL_BTCOEXIST

[Tim Gardner]

Larry Finger wrote:
> Tim Gardner wrote:
>> Larry,
>>
>> What does this flag do? It looks like it must change the on-the-air
>> behavior with regard to stomping on Bluetooth. This LP comment indicates
>> that these uncooperative adapters are causing faults in the Bluetooth
>> driver:
>>
>> https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/257020/comments/5
>>
>>
>> While I believe the root issue is within the Bluetooth driver (nothing
>> ought to be able to make it crash), is my hypothesis correct about the
>> on-the-air transmit characteristics?
> 
> I have added Michael Buesch to the Cc list. He knows a lot more about
> the driver than I do and will correct any misstatements of mine.
> 
> Yes, that flag deals with Bluetooth coexistence in the 2.4 GHz band. I
> reread the original posting and I have no idea why the OP is blaming
> commit c7202b637779f7e26decd6525a2f4463db918aaf. It only affects a few
> cards and b43 is not even loaded in the dump that is shown. My belief
> system does not allow the possibility for drivers that have never been
> loaded to cause faults.
> 
> I think whatever is done for coexistence is handled by the firmware.
> Outside of the special quirks implemented by the above commit, and the
> ones I have submitted since, the driver does nothing special. It just
> hands off the modified board flags to the shared memory.
> 
> I definitely agree that it is a problem with the Bluetooth driver.
> 
> Larry
> 

It is comforting to know we share the same belief system :) If I had
done my homework I would have _also_ noticed the b43 driver wasn't even
loaded. In fact, the report specifically mentions i3945. Doh!

Thanks for the clarification.

rtg
-- 
Tim Gardner tim.gardner at canonical.com