Date: Tue, 24 Sep 2013 00:52:24 +0000
From: Michael Stolovitzsky <emestee@catnarok.net>
To: linux-wireless@vger.kernel.org
Subject: Re: brcmsmac causes soft lockup in 3.12-rc1
Message-ID: <20130924005224.GA27400@mail.catnarok.net> (sfid-20130924_031519_488712_F8737CE8)
References: <20130921223440.GA5297@mail.catnarok.net>
 <523FF83D.8030103@broadcom.com>
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On Mon, Sep 23, 2013 at 10:13:49AM +0200, Arend van Spriel wrote:
> On 09/22/2013 12:34 AM, Michael Stolovitzsky wrote:
> >Hi,
> >
> >On 3.12-rc1, modprobe brcmsmac causes a soft lockup (trace #1), effectively killing the box. This is a Lenovo S206
> >with BCM4313 (14e4:4727), which I believe is a bluetooth combo board. After a while,
> >RCU scheduler code detects a lockup (trace #2).
> >
> >This did not happen in 3.11.1, although brcmsmac hasn't worked on this machine
> >as far as I remember. In  the previous kernels (~3.2.0+), it loads, but the
> >reception is extremely weak - you must be within few meters to the AP, and the card would
> >die after several minutes. The proprietary wl.ko driver works fine.
> >
> >I've attached the dmesg output, the kernel configuration and the output of lspci -vnn.
> >I'm comfortable with experimenting; please let me know how I can help here.
> 
> A fix for this problem has been submitted to John. I think it is in
> transit to mainline so probably will be in 3.12-rc2.
> 
> Here the URL of the patch:
> 
> https://git.kernel.org/cgit/linux/kernel/git/linville/wireless.git/patch/?id=aaa2ced15ad8dca8048666c9f70736424d696a6b
> 

Arend, much thanks and an apology for not checking the patches. I will try this out ASAP.

Is the (presumedly) low RX gain also a known problem with brcmsmac on BCM4313?