linux-kernel - Re: [PATCH regression/bisected] Revert "brcmsmac: support 4313iPA"

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Message-ID: <CANq1E4TsM6yoSt9aELFan0ayEw3PSfYCe+PEe35YFHzZ-9rTuA@mail.gmail.com>
Date:	Mon, 18 Mar 2013 14:58:08 +0100
From:	David Herrmann <dh.herrmann@...il.com>
To:	Piotr Haber <phaber@...adcom.com>
Cc:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	Arend van Spriel <arend@...adcom.com>,
	"John W. Linville" <linville@...driver.com>,
	brcm80211-dev-list@...adcom.com, netdev@...r.kernel.org,
	Pieter-Paul Giesberts <pieterpg@...adcom.com>
Subject: Re: [PATCH regression/bisected] Revert "brcmsmac: support 4313iPA"

Hi Piotr

On Mon, Mar 18, 2013 at 2:49 PM, Piotr Haber <phaber@...adcom.com> wrote:
> On 03/18/13 11:45, David Herrmann wrote:
>> This reverts commit b6fc28a158076ca2764edc9a6d1e1402f56e1c0c. It breaks
>> wireless AP reconnection on: (14e4:4727)
>>   Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller
>>
>> Any attempt to reconnect to an AP results in timeouts no matter how near to the
>> AP I am:
>>  00:10:40 $nb kernel: wlan0: authenticate with 00:18:39:0a:8e:23
>>  00:10:40 $nb kernel: wlan0: direct probe to 00:18:39:0a:8e:23 (try 1/3)
>>  00:10:40 $nb kernel: wlan0: direct probe to 00:18:39:0a:8e:23 (try 2/3)
>>  00:10:41 $nb kernel: wlan0: direct probe to 00:18:39:0a:8e:23 (try 3/3)
>>  00:10:41 $nb kernel: wlan0: authentication with 00:18:39:0a:8e:23 timed out
>> ---
>> Hi
>>
>> I tried coming up with a fix instead of reverting this commit, but the commit is
>> way to big for me to understand what's going on. Sorry.
>>
>> With linux-3.8 connecting to an AP broke on my machine. I could connect to an AP
>> one time, but any further attempt resulted in:
>>  00:10:40 $nb kernel: wlan0: authenticate with 00:18:39:0a:8e:23
>>  00:10:40 $nb kernel: wlan0: direct probe to 00:18:39:0a:8e:23 (try 1/3)
>>  00:10:40 $nb kernel: wlan0: direct probe to 00:18:39:0a:8e:23 (try 2/3)
>>  00:10:41 $nb kernel: wlan0: direct probe to 00:18:39:0a:8e:23 (try 3/3)
>>  00:10:41 $nb kernel: wlan0: authentication with 00:18:39:0a:8e:23 timed out
>>
>> Even sitting right next to the AP didn't help so I started bisecting and it
>> turned out to be:
>>   "brcmsmac: support 4313iPA" b6fc28a158076ca2764edc9a6d1e1402f56e1c0c
>> Please revert it.
>>
>> Thanks
>> David
>>
> Hi,
> unfortunately this is not a first report of this patch breaking 4313 for some users.
> I'm pretty confident that it is hardware revision related as we have 4313ePA and iPA boards running
> successfully in our test setup.
> Could you aid us in effort of finding the problem by supplying the contents of this debugfs file:
> <debugfs_mount>/brcmsmac/bcma0:0/hardware

Hi

$ cat /sys/kernel/debug/brcmsmac/bcma0\:0/hardware
board vendor: 185f
board type: 51a
board revision: 1408
board flags: 8402a01
board flags2: 880
firmware revision: 262032b

I can also try partial reverts of that commit, but I really don't know
which parts might be important.

Thanks
David
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