Date:	Wed, 04 Jul 2012 23:14:42 -0500
From:	Alex Villacís Lasso <a_villacis@...osanto.com>
To:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Francois Romieu <romieu@...zoreil.com>, netdev@...r.kernel.org
Subject: Re: BISECTED: Re: REGRESSION: 3.4.0->3.5.0-rc2 kernel WARNING on
 cable plug on Acer Aspire One, no network

El 04/07/12 02:02, Marek Szyprowski escribió:
> Hello,
>
> On Tuesday, July 03, 2012 4:27 PM Alex Villací¬s Lasso wrote:
>
>> El 03/07/12 00:40, Marek Szyprowski escribió:
>>> Hi Alex,
>>>
>>> On Tuesday, July 03, 2012 4:45 AM Alex Villacís Lasso wrote:
>>>
>>>> -------- Mensaje original --------
>>>> Asunto:  BISECTED: Re: REGRESSION: 3.4.0->3.5.0-rc2 kernel WARNING on cable
>>>> plug on Acer Aspire One, no network Fecha:  Mon, 02 Jul 2012 21:33:41 -0500 De:
>>>>    Alex Villacís Lasso <a_villacis@...osanto.com> Para:  Francois Romieu
>>>> <romieu@...zoreil.com> CC:  netdev@...r.kernel.org
>>>> El 01/07/12 08:50, Alex Villacís Lasso escribió:
>>>>> El 11/06/12 16:38, Francois Romieu escribió:
>>>>>> Alex Villacís Lasso <a_villacis@...osanto.com> :
>>>>>> [...]
>>>>>>> $ grep XID dmesg-3.5.0-rc2.txt
>>>>>>> [   15.873858] r8169 0000:02:00.0: eth0: RTL8102e at 0xf7c0e000,
>>>>>>> 00:1e:68:e5:5d:b1, XID 04a00000 IRQ 44
>>>>>> The 8102e has not been touched by that many suspect patches but I do
>>>>>> not see where the problem is :o(
>>>>>>
>>>>>> Can you peel off the r8169 patches between 3.4.0 and 3.5-rc ?
>>>>>>
>>>>> Still present in 3.5-rc5. Bisection still in progress.
>>>>>
>>>>> --
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>>>> My full bisection points to this commit:
>>>>
>>>> commit 0a2b9a6ea93650b8a00f9fd5ee8fdd25671e2df6
>>>> Author: Marek Szyprowski <m.szyprowski@...sung.com>
>>>> Date:   Thu Dec 29 13:09:51 2011 +0100
>>>>
>>>>       X86: integrate CMA with DMA-mapping subsystem
>>>>
>>>>       This patch adds support for CMA to dma-mapping subsystem for x86
>>>>       architecture that uses common pci-dma/pci-nommu implementation. This
>>>>       allows to test CMA on KVM/QEMU and a lot of common x86 boxes.
>>>>
>>>>       Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
>>>>       Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
>>>>       CC: Michal Nazarewicz <mina86@...a86.com>
>>>>       Acked-by: Arnd Bergmann <arnd@...db.de>
>>>>
>>>> Is this commit somehow messing with the network card DMA?
>>> This commit in fact touches DMA-mapping subsystem and introduces a bug,
>>> which has been finally fixed by commit c080e26edc3a2a3 merged to v3.5-rc3.
>>> After applying it the DMA-mapping subsystem should work exactly the same was
>>> as in v3.4. Could you please check if it fixes this issue?
>>>
>>> Best regards
>> No. It still fails in 3.5-rc5, as mentioned before.
> Hmm. I was a bit confused, because both the subject and git bisect log pointed to v3.5-rc2,
> which had that bug. Maybe there is one some other issue present in v3.5-rc5 not related to
> my patches?
>
> Could you check with v3.5-rc5 if reverting patch c080e26edc3a2a3cdfa4c430c663ee1c3bbd8fae
> and 0a2b9a6ea93650b8a00f9fd5ee8fdd25671e2df6 fixes the problems with rtl driver?
>
> Best regards
Reverting the two patches indeed fixes the bug on -rc5.

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