Re: Wireless IBSS on Linux-2.6.34 broken by commit 3bbb9ec946428b96657126768f65487a48dd090c

[Johannes Berg <johannes.berg@intel.com>]

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On Sun, 2010-05-23 at 05:58 +0100, Jeff Chua wrote:> Wireless IBSS on Linux-2.6.34 is broken. Reverting commit> 3bbb9ec946428b96657126768f65487a48dd090c makes it work again. This was> tested by bisecting the kernel.> > I'm using 6200 AGN ...> > cfg80211: Calling CRDA to update world regulatory domain> iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:> iwlagn: Copyright(c) 2003-2010 Intel Corporation> iwlagn 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16> iwlagn 0000:02:00.0: setting latency timer to 64> iwlagn 0000:02:00.0: Detected Intel(R) Centrino(R) Advanced-N 6200 AGN, REV=0x74> iwlagn 0000:02:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels> iwlagn 0000:02:00.0: irq 46 for MSI/MSI-X> iwlagn 0000:02:00.0: loaded firmware version 9.193.4.1 build 19710> > > > So, where should the fix be?> > > Here's the commit ...> > 3bbb9ec946428b96657126768f65487a48dd090c is the first bad commit> commit 3bbb9ec946428b96657126768f65487a48dd090c> Author: Arjan van de Ven <arjan@linux.intel.com>> Date:   Thu Mar 11 14:04:36 2010 -0800> >     timers: Introduce the concept of timer slack for legacy timers
This is odd -- as Arjan said more logging would be good, if you canenable mac80211 IBSS debug (though in one case we had recently that_fixed_ the issue unfortunately) -- it's under the mac80211 debug menuKconfig.
FWIW, I don't know about anything in mac80211 that would be timersensitive?
johannes
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