BCM4331 fails to associate after suspend

[John Schoenick]

On 02/03/2012 02:28 PM, Seth Forshee wrote:
> I've been looking into some association problems seen with a MacBook Pro
> 8,2 that has BCM4331 wireless, which I've confirmed still exist in
> wireless-testing. The association failures reliably start appearing
> after the machine is resumed from s3 without external power applied
> (whether or not power is applied when the machine is suspended doesn't
> matter).
>
> When the association failures are happening the BCM4331 seems to be able
> to receive packets okay, as it can scan successfully. Transmissions
> don't work though; no frames from the BCM4331 are ever seen on the air,
> as though the tx path is off. Reloading both the b43 and bcma drivers
> gets things working again, but reloading just b43 does not.
>
> I've been looking around a bit in the b43 and bcma drivers, but so far I
> haven't found the reason why this happens. Any help would be
> appreciated. Let me know if there's additional information I can
> provide.
>
> Thanks,
> Seth
>
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I can add that reloading the modules after a suspend/resumes restores 
functionality, though oddly adding them to SUSPEND_MODULES in pm-utils 
config does not.