Koelsch boot broken on 3.18-rc1 ?

[Maxime Coquelin]

On 10/23/2014 01:50 PM, Geert Uytterhoeven wrote:
> Hi Laurent,
>
> On Thu, Oct 23, 2014 at 1:19 PM, Laurent Pinchart
> <laurent.pinchart at ideasonboard.com> wrote:
>> On Thursday 23 October 2014 14:00:31 Laurent Pinchart wrote:
>>> On Thursday 23 October 2014 12:59:03 Geert Uytterhoeven wrote:
>>>> On Thu, Oct 23, 2014 at 12:53 PM, Laurent Pinchart wrote:
>>>>> While rebasing my rcar-dmac patches on top of 3.18-rc1 I ran into issues
>>>>> booting the Koelsch board.
>>>>>
>>>>> Bisecting the problem pointed to
>>>>>
>>>>> commit 95b0e655f9148881907fdbe5baba6a9f5d094fee
>>>>> Author: Marek Szyprowski <m.szyprowski at samsung.com>
>>>>> Date:   Thu Oct 9 15:26:49 2014 -0700
>>>>>
>>>>>      ARM: mm: don't limit default CMA region only to low memory
>>>>>
>>>>> With LPAE enabled this results in the sh-eth driver failing with
>>>>>
>>>>> [    1.170000] irq 194: nobody cared (try booting with the "irqpoll"
>>>>> option)
>>>>>
>>>>> and from time to time with an Address Error message as well (which got
>>>>> pushed out of my console log, I'll try to reproduce that again to get
>>>>> the exact message).
>>>> renesas-drivers-2014-10-23-v3.18-rc1 works on Koelsch for me, with LPAE.
>>> I'll test it.
>> Both problems still occur for me with renesas-drivers-2014-10-23-v3.18-rc1.
>> What kernel configuration do you use ?
> Ah, didn't have CONFIG_CMA enabled.
> koelsch_defconfig with CONFIG_CMA=y fails for me, too.
> The failure mode seems to be slightly different with and without DEBUG_LL.
>
> Interestingly, multi_v7_defconfig, which has CONFIG_CMA=y, does work.
But LPAE is not enabled in multi_v7_defconfig?
>
> Gr{oetje,eeting}s,
>
>                          Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                  -- Linus Torvalds
>
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