linux-kernel - Re: [REGRESSION] 3.10.{6,7} crashes on network activity

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Date:	Tue, 20 Aug 2013 08:26:11 +0800
From:	Tom Gundersen <teg@...m.no>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	stable@...nel.org,
	Linux Wireless List <linux-wireless@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Felix Fietkau <nbd@...nwrt.org>,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: [REGRESSION] 3.10.{6,7} crashes on network activity

On Tue, Aug 20, 2013 at 8:03 AM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
> On Tue, Aug 20, 2013 at 07:59:47AM +0800, Tom Gundersen wrote:
>> Hi guys,
>>
>> Starting with 3.10.6 (and still present in .7) I get an oops on
>> connecting to the network.
>>
>> The attached picture shows the oops. In case it does not reach the ML,
>> the top of the call trace reads:
>>
>> brcms_c_compute_rtscts_dur
>> brcms_c_ampdu_finalize
>> ampdu_finalize
>> dma_txfast
>> brcms_c_txfifo
>> brcms_c_sendpkt_mac80211
>> brcms_ops_tx
>> __ieee80211_tx
>>
>> I bisected the problem and the first bad commit is
>>
>> commit ef47a5e4f1aaf1d0e2e6875e34b2c9595897bef6
>> Author: Felix Fietkau <nbd@...nwrt.org>
>> Date:   Fri Jun 28 21:04:35 2013 +0200
>>
>>     mac80211/minstrel_ht: fix cck rate sampling
>>
>>     commit 1cd158573951f737fbc878a35cb5eb47bf9af3d5 upstream.
>>
>> Reverting it on top of .7 fixes the problem.
>>
>> I had the same (I suppose) problem on mainline some time ago, but I
>> have not bisected it, verified that the problem still occurs there, or
>> checked if reverting the upstream patch fixes it. I'd be happy to do
>> that if it would help though.
>>
>> Let me know if you need any more information.
>
> Do you have this same problem with 3.11-rc6 as well?

Yes, I just confirmed. I also confirmed that reverting the mainline
commit on top of -rc6 fixes the problem.

Cheers,

Tom
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