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Re: [ath5k-devel] Race condition in CRDA calls?

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On Friday 08 October 2010 09:57:17 you wrote:
> root@RMR1:~# 1284335259.046129: phy #1: regulatory domain change:
> intersection  used due to a request made by a driver on phy1
> 1284335263.403515: phy #1: regulatory domain change: intersection used due
> to  a request made by a driver on phy1
> 
> interesting that phy #1 appears twice...

When I hit this bug my idea was that the problem lies in the CRDA API: the 
wiphy identifier is not sent to CRDA, instead a global variable last_request 
is used. However, if a new request is started before the previous one is 
finished, the old last_request value is replaced, both replies use the same 
last_request and strange think happen...

I hoped someone who knows the kernel-userspace interaction better will confirm 
or disprove it, so I didn't investigate it further, and then I just forgot 
about it...

Lukas Turek

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