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Re: [PATCH] mac80211: fix suspend/resume races with unregister hw

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On Thu, Sep 08, 2011 at 04:04:28PM +0000, Michael Witten wrote:
> On Thu, Sep 8, 2011 at 06:44, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
> > On Wed, Sep 07, 2011 at 09:50:29PM -0000, Michael Witten wrote:
> >> My boot process is stalling proximate the following messages (after a period
> >> of time, some other message might show up, but the boot never progresses much
> >> further):
> >>
> >>   cfg80211: World regulatory domain updated:
> >>   cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
> >>   cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >>   cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
> >>   cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
> >>   cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >>   cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
> >>
> >> I bisected to this patch, namely via the following commit:
> >>
> >>   commit ecb4433550f0620f3d1471ae7099037ede30a91e
> >>   Author: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
> >>   Date:   Fri Aug 12 14:00:59 2011 +0200
> >
> > Grr, crap.
> >
> >>
> >> Now, it may be the case that my system startup's scripts are doing something
> >> funny, as the stall described above occurs after Arch Linux outputs:
> >>
> >>   Waiting for UDev uevents to be processed
> >>
> >> At this point, that's all I know.
> >
> > What wireless driver are you using? If this is ipw2x00 please try
> > attached patch.
> 
> I am indeed using `ipw2200', and your patch seems to fix the problem.
> 
> How did you know what to do?

You are not the first person who hit this bug and did bisection :-/
Witold (CCed) did it. Can you also check if wireless network and rmmod
ipw2x00 works? I did not yet receive that information from Witold
regarding latest patch.

Thanks
Stanislaw

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