Re: Problem booting Kernel 4.8-rc1 on Sam460ex ( Canyonlands)

On 8/8/2016 4:19 PM, Rob Herring wrote:

On Mon, Aug 8, 2016 at 2:25 PM, Julian Margetson [off-list ref] wrote:

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On 8/8/2016 9:39 AM, Kefeng Wang wrote:

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+cc Rob

On 2016/8/8 20:51, Julian Margetson wrote:

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On 8/8/2016 8:22 AM, Kefeng Wang wrote:

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On 2016/8/8 19:52, Julian Margetson wrote:

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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.

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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

The following patch fixes my issue.

http://linuxppc.10917.n7.nabble.com/PATCH-powerpc-populate-the-default-bus-with-machine-arch-initcall-td112132.html

Thank you

Regards

Julian