linux-kernel - Re: iwlagn interrupt problem

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Date:	Fri, 12 Dec 2008 08:03:19 -0500
From:	Dan Williams <dcbw@...hat.com>
To:	Zdenek Kabelac <zkabelac@...hat.com>
Cc:	"Alexander E. Patrakov" <patrakov@...il.com>,
	reinette chatre 
	<public-reinette.chatre-ral2JQCrhuEAvxtiuMwx3w@...h.gmane.org>,
	"linux-kernel-u79uwXL29TY76Z2rM5mHXA@...lic.gmane.org" 
	<public-linux-kernel-u79uwXL29TY76Z2rM5mHXA@...h.gmane.org>,
	"linux-wireless-u79uwXL29TY76Z2rM5mHXA@...lic.gmane.org" 
	<public-linux-wireless-u79uwXL29TY76Z2rM5mHXA@...h.gmane.org>
Subject: Re: iwlagn interrupt problem



On Fri, 2008-12-12 at 12:31 +0100, Zdenek Kabelac wrote:
> 
> Alexander E. Patrakov napsal(a):
> > 2008/12/12 Zdenek Kabelac <zkabelac@...hat.com>:
> >> I assume that this backtrace I've got with 2.6.28-rc7 is the same issue ?
> > 
> > No, this is different. My issue is with unacceptable latency when
> > bringing the interface down. In your dmesg, the interface was never
> > brought up or down.
> > 
> 
> Hmm - it was something like an hour after resume when the problem started,
> 
> Here is timed part of the same backtrace:
> 
> [65627.782972] wlan0: associate with AP 00:11:d8:da:65:40
> [65627.785569] wlan0: RX ReassocResp from 00:11:d8:da:65:40 (capab=0x401 
> status=0 aid=8)
> [65627.785576] wlan0: associated
> [69541.209873] wlan0: No ProbeResp from current AP 00:11:d8:da:65:40 - assume 
> out of range
> [69541.810104] iwl3945: Error sending REPLY_SCAN_CMD: time out after 500ms.
> [69542.309861] iwl3945: Error sending REPLY_RXON_ASSOC: time out after 500ms.
> 
> 
> The begging of my trace looked similar.
> 
> Should I open new bugzilla separately ?

If you can reproduce this, it sounds more like a firmware problem, so
Reinette is probably going to want you to enable firmware debugging in
the driver.  Try removing the iwl3945 module with rmmod, then "modprobe
iwl3945 debug=0x43fff", reproduce this command timeout, and attach the
logs to whatever bug report you file.

Dan



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