Gavin Shan [off-list ref] 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?