Subject: Re: [PATCH RESEND v2 0/7] powerpc/powernv: Unified PCI slot reset and hotplug

From: Gavin Shan <[email-masked]>
Date: Wed, 18 Feb 2015 09:26:15 +1100

On Wed, Feb 18, 2015 at 08:44:19AM +1100, Stewart Smith wrote:
>Gavin Shan <[email-masked]> writes:
>
>> The patchset was built based on patchset "powerpc/powernv: Simplify EEH
>> implementation", which can be found from:
>>
>> https://patchwork.ozlabs.org/patch/439956/
>>
>> The patchset corresponds to skiboot changes, which manages PCI slots
>> in a unified way: OPAL APIs used to do slot reset, power management,
>> presence status retrival. The patchset shouldn't be merged before
>> the OPAL firmware counterpart is merged:
>>
>> https://patchwork.ozlabs.org/patch/440463/
>
>But this patchset will work with old OPAL, right? We're not breaking
>compatibility with newer kernels (with this patchset) and older
>firmware?

Yes. With old OPAL, the reset stuff in Linux works as before and we
shouldn't see hotpluggable slots from /sys/bus/pci/slots.

The compatibility issue was pointed by Ben. It's something fixed by
this revision (v2).

Thanks,
Gavin