software scan fix - please test (Was: why we can't use the net80211 taskqueue for everything)

[Andriy Voskoboinyk]

> hi,
>
> andriy has a few reviews out that tidy up some things, which I'd reply
> to, but .. reviews is offline. So, here's the 30 second version:
>
> * the net80211 taskqueue runs the software scan engine, and the
> software scan engine currently sleeps whilst it's running.
>
> This means that if you put newstate, deferred transmit, etc into the
> net80211 taskqueue, then it just won't run during scan.
>
> The net80211 software scan thing should be modified to not sleep
> whilst it's waiting for scan results and instead just kick off another
> timer event to finish that part of the loop. Then yes, we can just
> migrate * to the net80211 task queue and use it for all serialisation
> of a wifi driver.
>
> (And yes, I'd like to see that done ASAP..)
>
> Thanks,
>
>
> -adrian

Hi,

I have replaced sleeping on conditional variable inside scan task
with scan_curchan task rescheduling (so this problem should be fixed now).

For everyone, who wishes to test: apply the attached patch
(merged from D5133, D5137, D5139, D5140, D5142, D5143, D5145, D5147, D5148  
and D5152)
and rebuild + install the kernel. Scan should work as before.

Thanks!
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