Problem booting Kernel 4.8-rc1 on Sam460ex ( Canyonlands)

[Rob Herring]

On Mon, Aug 8, 2016 at 2:25 PM, Julian Margetson <runaway at candw.ms> wrote:
> On 8/8/2016 9:39 AM, Kefeng Wang wrote:
>>
>> +cc Rob
>>
>> On 2016/8/8 20:51, Julian Margetson wrote:
>>>
>>> On 8/8/2016 8:22 AM, Kefeng Wang wrote:
>>>>
>>>> On 2016/8/8 19:52, Julian Margetson wrote:
>>>>>
>>>>> Problem booting Kernel 4.8-rc1 on Sam460ex ( Canyonlands) machine .
>>>>>
>>>>> This is what I get with the bisect.
>>>>
>>>> Hi Julian
>>>>
>>>> I have no Sam460ex machine, could you show the good and bad kernel
>>>> bootlog?
>>
>> I have no experience about PowerPC, the status shows below,
>> version                 boot
>> v4.7                    ok
>> v4.8-rc1                fail
>> v4.7 + this patch       fail(right?)
>>
>> Does PowerPC support earlyprintk/earlycon? Please set it, and let's show
>> somethings from earlyprintk.
>
> Not getting any output with earlyprintk so not sure if it works or if my
> settings are incorrect .

This should work: earlycon=uart8250,mmio,ef600300,115200n8

Adding "initcall_debug debug" would also be useful here.

> I tried to revert the commit but the result is the same so I suspect that
> this one may not really be the problem .
> Looks like the real problem may be something affecting the the device tree
> loading .

That's strange. If it is this commit, the init order changes as it
changed from device to arch initcall. I haven't seen any other
platforms having problems.

Rob