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Subject: Re: DEBUG_LOCKS_WARN_ON triggered by bcm43xx-SoftMAC
From: Arjan van de Ven <arjan@infradead.org>
To: Michael Buesch <mb@bu3sch.de>
Cc: Larry Finger <Larry.Finger@lwfinger.net>, bcm43xx-dev@lists.berlios.de,
       netdev@vger.kernel.org, linux-kernel@vger.kernel.org
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	 <200608161806.10348.mb@bu3sch.de>
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Organization: Intel International BV
Date: Wed, 16 Aug 2006 18:21:44 +0200
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On Wed, 2006-08-16 at 18:06 +0200, Michael Buesch wrote:
> On Wednesday 16 August 2006 05:54, Larry Finger wrote:
> > Using vanilla wireless-2.6 from Linville's tree as updated today, I
> > get a warning generated by the statement
> >          if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
> > in kernel.lockdep.c. This warning only occurs when my wireless
> > interface is inserted and bcm43xx-softmac is activated. For that
> > reason I have included the SoftMAC and bcm43xx messages.
> > 
> > kernel: SoftMAC: sent association request!
> > kernel: SoftMAC: associated!
> > kernel: bcm43xx: set security called, .active_key = 0, .level = 2,
> > .enabled = 1, .encrypt = 1
> > kernel: bcm43xx: set security called, .enabled = 1, .encrypt = 1
> > kernel: BUG: warning at kernel/lockdep.c:1801/trace_hardirqs_on()
> > kernel:  [<c0103da7>] show_trace_log_lvl+0x197/0x1c0
> > kernel:  [<c01052db>] show_trace+0x1b/0x20
> > kernel:  [<c0105306>] dump_stack+0x26/0x30
> > kernel:  [<c013596f>] trace_hardirqs_on+0x17f/0x190
> > kernel:  [<c0104a15>] do_general_protection+0xc5/0x230
> > kernel:  [<c01034b1>] error_code+0x39/0x40
> > kernel:  [<000038c7>] 0x38c7
> > kernel:  [<c01052db>] show_trace+0x1b/0x20
> > kernel:  [<c0105306>] dump_stack+0x26/0x30
> > kernel:  [<c013596f>] trace_hardirqs_on+0x17f/0x190
> > kernel:  [<c0104a15>] do_general_protection+0xc5/0x230
> > kernel:  [<c01034b1>] error_code+0x39/0x40
> > 
> > I'm at a loss here. Can anyone explain how to interpret this dump? I
> > think I see a general protection fault, but what to do from there is a
> > mystery.
> 
> Hm, weird bug.
> I can't reproduce this on i386 or PPC.
> Could it be a bug in the lockdep code?

is there anything more in the trace???