Koelsch boot broken on 3.18-rc1 ?

[Geert Uytterhoeven]

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.

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