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Re: ar9170usb crashes during iwconfig for ad-hoc mode

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> On Mon, 2009-08-03 at 10:44 +0200, Johannes Berg wrote:
> 
> > > >     ifconfig wlan1 down
> > > >     iwconfig wlan1 mode managed essid huhu
> > > >     ifconfig wlan1 up
> > > >     ifconfig wlan1 down
> > > >     iwconfig wlan1 mode ad-hoc essid huhu_a channel 1
> 
> > No, it's a bug in cfg80211 :)
> 
> But it's not making sense to me. I'll have to try to reproduce it. In
> any case, we shouldn't be calling in to mac80211 from cfg80211 while the
> interface is down.

I guess this is caused by the call to __cfg80211_leave_ibss()
in  net/wireless/ibss.c::cfg80211_ibss_wext_siwfreq() trying to
disable the beacon via net/mac80211::ieee80211_ibss_leave().
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