linux-kernel - Re: non-Multiplatform APE6EVM broken in v3.18-rc1

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Date:	Mon, 03 Nov 2014 11:33:33 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Simon Horman <horms@...ge.net.au>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	Linux-sh list <linux-sh@...r.kernel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: non-Multiplatform APE6EVM broken in v3.18-rc1

On 10/30/2014 02:34 AM, Simon Horman wrote:
> On Wed, Oct 29, 2014 at 06:05:03PM +0900, Simon Horman wrote:
>> On Wed, Oct 29, 2014 at 09:13:11AM +0100, Geert Uytterhoeven wrote:
>>> On Wed, Oct 29, 2014 at 3:08 AM, Simon Horman <horms@...ge.net.au> wrote:
>>>> On Wed, Oct 29, 2014 at 09:12:58AM +0900, Simon Horman wrote:
>>>>> On Tue, Oct 28, 2014 at 10:32:32AM +0100, Geert Uytterhoeven wrote:
>>>>>> On Tue, Oct 28, 2014 at 10:23 AM, Simon Horman <horms@...ge.net.au> wrote:
>>>>>>> On Tue, Oct 28, 2014 at 08:59:28AM +0100, Geert Uytterhoeven wrote:
>>>>>>>> On Tue, Oct 28, 2014 at 1:41 AM, Simon Horman <horms@...ge.net.au> wrote:
>>>>>>>>> I have noticed that there appears to be a regression between v3.17 and
>>>>>>>>> v3.18-rc1 such that non-multiplatform APE6EVM (ape6evm_defconfig) no longer
>>>>>>>>> boots.  This appears to be the case using both reference DT (MACH_APE6EVM)
>>>
>>>> It seems that the boot stops here:
>>>>
>>>> ...
>>>> smsc911x smsc911x eth0: MAC Address: 00:08:f7:00:02:4b
>>>> rcar_thermal rcar_thermal: Runtime PM disabled, clock forced on.
>>>> rcar_thermal rcar_thermal: 3 sensor probed
>>>> sh_mobile_sdhi sh_mobile_sdhi.0: Runtime PM disabled, clock forced on.
>>>> sh_mobile_sdhi sh_mobile_sdhi.0: No vqmmc regulator found
>>>>
>>>> I re-ran my bisection and this time the following showed up as the culprit.
>>>>
>>>> I suspect that the initialisation of mmcif, which is usually the next
>>>> device to be initialised, sleeps and never wakes up because the timer is
>>>> disabled.
>>>>
>>>> commit c387f07e6205cc13f57c1def5f885bf0a20e1c2d
>>>> Author: Sudeep Holla <sudeep.holla@....com>
>>>> Date:   Mon Sep 29 01:50:05 2014 +0200
>>>>
>>>>      clocksource: arm_arch_timer: Discard unavailable timers correctly
>>>
>>> Apparently reported and fixed by Laurent and a few others, cfr.
>>> http://www.spinics.net/lists/arm-kernel/msg371615.html
>
> I have temporarily cherry-picked the following, which is no present in
> linux-next, into the devel branch of the renesas tree. It appears to
> resolve the problem I reported.
>
> b0ad5917960ca80f96bae ("ARM/ARM64: arch-timer: fix arch_timer_probed logic")

Yes, that is the right one.

This patch is now upstream and will be in -rc3.

Thanks
   -- Daniel


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