BCM4331 fails to associate after suspend

[Hauke Mehrtens]

On 02/06/2012 06:37 PM, Seth Forshee wrote:
> On Mon, Feb 06, 2012 at 05:56:20PM +0100, Rafał Miłecki wrote:
>> 2012/2/4 Seth Forshee <seth.forshee at canonical.com>:
>>> On Sat, Feb 04, 2012 at 11:44:23AM +0100, Arend van Spriel wrote:
>>>> On 02/03/2012 11:28 PM, Seth Forshee wrote:
>>>>>
>>>>> 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.
>>>>>
>>>>
>>>> With which kernel version do you see these issues? BCMA suspend/resume
>>>> code has a fix in 3.3-rc1. So if you are seeing it on a 3.2 kernel,
>>>> please give it a try.
>>>
>>> I've tried 3.3-rc2 and the wirless-testing tree, and the problem still
>>> exists in both.
>>
>> I don't have access to suspendable machine with Mini PCIe card, not to
>> mention BCM4331 which is available for Mac-specific slot only (or
>> routers as embedded wifi). It may be b43 needs to fix but I'm not
>> really able to work on that. Plus the whole BCM4331 code is really
>> tricky, as it comes from RE based on dumps only :(
> 
> Okay, I'll keep poking at it to see if I can come up with anything. If
> you've got any suggestions on things I should be looking at or trying,
> I'm all ears.
> 
> Seth

According to the Broadcom SDK for SoCs bcma_pcicore_serdes_workaround()
should be called when coming out of standby/hibernate.
The code wl uses to do the same thing as bcma does is open source. You
find it in the GPL package of many Broadcom based Wifi Routers.

Hauke