[PATCH] Bugfix: powerpc/eeh: Create eeh sysfs entry in post_init()

[Gavin Shan]

On Wed, Jun 25, 2014 at 03:27:55PM +0800, Mike Qiu wrote:
>On 06/25/2014 01:33 PM, Gavin Shan wrote:
>>On Tue, Jun 24, 2014 at 11:32:07PM -0400, Mike Qiu wrote:
>>
>>[ cc Richard ]
>>
>>>Eeh sysfs entry created must be after EEH_ENABLED been set
>>>in eeh_subsystem_flags.
>>>
>>>In PowerNV platform, it try to create sysfs entry before
>>>EEH_ENABLED been set, when boot up. So nothing will be
>>>created for eeh in sysfs.
>>>
>>Could you please make the commit log more clear? :-)
>>
>>I guess the issue is introduced by commit 2213fb1 ("
>>powerpc/eeh: Skip eeh sysfs when eeh is disabled"). The
>>commit checks EEH is enabled while creating PCI device
>>EEH sysfs files. If not, the sysfs files won't be created.
>>That's to avoid warning reported during PCI hotplug.
>>
>>The problem you're reporting (if I understand completely):
>>You don't see the sysfs files after the system boots up.
>>If it's the case, you probably need following changes in
>>arch/powerpc/platforms/powernv/pci.c::pnv_pci_ioda_fixup().
>>Could you have a try with it?
>>
>>#ifdef CONFIG_EEH
>>	eeh_probe_mode_set(EEH_PROBE_MODE_DEV);
>>-	eeh_addr_cache_build();
>>	eeh_init();
>>+	eeh_addr_cache_build();
>>#endif
>
>But this was not work, as I test, see boot log below:
>

Yeah, we can't convert eeh_dev to pci_dev that time. The
association is populated by eeh_addr_cache_build(). The
attached patch should fix your issue. I tried on P7 machine
and sysfs entries created. Could you help having a test
on your machine? :-)

Thanks,
Gavin
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