LOR in iwi with new 802.11 work

Stefan Ehmann shoesoft at gmx.net
Sat Jun 16 12:15:18 UTC 2007


On Friday 15 June 2007 18:23:50 Sam Leffler wrote:
> Stefan Ehmann wrote:
> > On Thursday 14 June 2007 18:16:54 Sam Leffler wrote:
> >> Stefan Ehmann wrote:
> >>> After the system is up for about 5 minutes, I see this LOR. Haven't
> >>> seen it posted yet.
> >>>
> >>> Stefan
> >>>
> >>> lock order reversal:
> >>>  1st 0xc2e4700c ieee80211com (802.11 com lock)
> >>> @ /usr/src/sys/net80211/ieee80211_scan.c:523
> >>>  2nd 0xc2e48400 iwi0 (network driver)
> >>> @ /usr/src/sys/modules/iwi/../../dev/iwi/if_iwi.c:1908
> >
> > ...
> >
> >> Yes, known and can safely be ignored.
> >
> > Okay, thanks.
> >
> > Another problem I've noticed (don't want to start a new thread):
> >
> > Before the latest commit, I've never seen dropouts in the connnection.
> >
> > But now I've seen for the second time that the connection drops for some
> > seconds. ifconfig shows no IP address. At least it recovers, but open
> > connections die.
> >
> > In dmesg I see:
> >
> > Jun 15 10:34:25 something kernel: iwi0: firmware stuck in state 4,
> > resetting Jun 15 10:34:25 something kernel: iwi0: link state changed to
> > DOWN Jun 15 10:34:28 something kernel: iwi0: link state changed to UP
> >
> > Is this a known issue? Do you need any more info?
>
> Andrew already responded but if you want to disable bg scanning do:
>
> ifconfig iwi0 -bgscan
Was bgscan on for iwi before the latest changes? A "ifconfig iwi0 scan" seems 
to cause a "scan stuck" every time. But this also happened before the 802.11 
changes IIRC. So this might be an old iwi bug after all. (I still wouldn't 
mind if it was resolved :))

Stefan


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