netdev - Re: d80211 deadlock with wpa

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Message-Id: <1184234538.6669.30.camel@johannes.berg>
Date:	Thu, 12 Jul 2007 12:02:18 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	"John W. Linville" <linville@...driver.com>
Cc:	seventh guardian <seventhguardian@...il.com>,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: d80211 deadlock with wpa_supplicant and rmmod

On Wed, 2007-07-11 at 19:41 -0400, John W. Linville wrote:

> > >I believe we have a deadlock in d80211.
> > 
> > I have it too. But I'm using iwl3945 driver, in-kernel mac80211, and a
> > gentoo kernel (basically a patched vanilla-2.6.22.1). My machine is a
> > x86_64 core 2 duo.
> > 
> > >The following triggers it on my 2way SMT machine with preempt.
> > >
> > >modprobe bcm43xx-d80211
> > >add sta0
> > >ifconfig sta0 up
> > >start wpa_supplicant on the interface
> > >rmmod bcm43xx-d80211

Sounds like the bug with the scheduled work locking. See the
"mac80211/bcm43xx deadlock" thread, there's a patch, report back if you
can/can not reproduce with the patch.

johannes

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