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

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Date:	Wed, 19 Oct 2011 18:48:17 +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>
Subject: Re: BUG: All network processes hang (brcmsmac/wpa_supplicant)

On 10/19/2011 04:55 PM, Nico Schottelius wrote:
> Hey Arend,
> 
> 
> Arend van Spriel [Wed, Oct 19, 2011 at 04:43:27PM +0200]:
>> 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 warnings are probably a diversion. This is the warning in
ieee80211_rx():

			if (WARN_ON(status->rate_idx < 0 ||
				    status->rate_idx >= sband->n_bitrates))
				goto drop;
			rate = &sband->bitrates[status->rate_idx];

This means that the driver (brcmsmac) provides a data packet with an
out-of-range rate index. This reminded me of a fix I made about a month
ago. Could you apply the attached patch file. It is based on:

commit bee709ab1d390afe69e4407bc86bb706c6fb2965
Merge: ad1c761 1f2c7e9
Author: Nico Schottelius <nico@...ethz.ch>
Date:   Tue Oct 18 00:04:05 2011 +0200

    Merge branch 'fix-edp-vdd-power' of ../keithp/linux

As it drops receive packets it may be your problem. Is your AP on 5GHz?

Gr. AvS

View attachment "0001-staging-brcm80211-fix-for-rate-index-in-receive-stat.patch" of type "text/x-patch" (1067 bytes)

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