netdev - Re: BUG: All network processes hang (brcmsmac/wpa

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Message-ID: <4E9EE20F.1030403@broadcom.com>
Date:	Wed, 19 Oct 2011 16:43:27 +0200
From:	"Arend van Spriel" <arend@...adcom.com>
To:	"Nico Schottelius" <nico-linux-20111017@...ottelius.org>,
	"Eric Dumazet" <eric.dumazet@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
cc:	wey-yi.w.guy@...el.com
Subject: Re: BUG: All network processes hang (brcmsmac/wpa_supplicant)

On 10/19/2011 04:28 PM, Nico Schottelius wrote:
> Triggered it! 
> 
> And also got the traceback!
> 
> Dmesg + log attached, let me know when I can pull the fix from
> somewhere.
> 
> Cheers,
>
> Nico
> 

I actually don't see the rtnl_lock or mutex_lock that was listed in your
original dmesg. There are a lot of warning traces from mac80211.c.

The other interesting thing is the following:

[  367.389096] wlan0: deauthenticating from 00:03:52:e3:0e:10 by local
choice (reason=3)
[  367.416312] cfg80211: Calling CRDA to update world regulatory domain
[  369.367667] wlan0: direct probe to 00:03:52:2c:01:00 (try 1/3)
[  369.565008] wlan0: direct probe to 00:03:52:2c:01:00 (try 2/3)
[  369.764891] wlan0: direct probe to 00:03:52:2c:01:00 (try 3/3)
[  369.964768] wlan0: direct probe to 00:03:52:2c:01:00 timed out
[  381.310339] wlan0: direct probe to 00:0f:61:1a:0c:50 (try 1/3)
[  381.508071] wlan0: direct probe to 00:0f:61:1a:0c:50 (try 2/3)
[  381.707955] wlan0: direct probe to 00:0f:61:1a:0c:50 (try 3/3)
[  381.907788] wlan0: direct probe to 00:0f:61:1a:0c:50 timed out
[  393.250073] wlan0: direct probe to 00:03:52:2c:01:00 (try 1/3)
[  393.447810] wlan0: direct probe to 00:03:52:2c:01:00 (try 2/3)
[  393.647700] wlan0: direct probe to 00:03:52:2c:01:00 (try 3/3)
[  393.847576] wlan0: direct probe to 00:03:52:2c:01:00 timed out
[  405.183177] wlan0: direct probe to 00:0f:61:1a:1d:30 (try 1/3)
[  405.380906] wlan0: direct probe to 00:0f:61:1a:1d:30 (try 2/3)
[  405.580773] wlan0: direct probe to 00:0f:61:1a:1d:30 (try 3/3)
[  405.780658] wlan0: direct probe to 00:0f:61:1a:1d:30 timed out

There is another thread title "iwlagn is getting very shaky". It makes
me wonder.

Where did you get your kernel from. From you dmesg I see:

Linux version 3.1.0-rc6-gbee709a (nico@...ef)

I tried to locate the SHA1 bee709a but it is not in my repository. I
want to look what the warnings from mac80211 mean.

Gr. AvS


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