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Subject: Re: [PATCH v7 03/60] sparc/PCI: Unify pci_register_region()
From: David Miller <davem@davemloft.net>
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From: Yinghai Lu <yinghai@kernel.org>
Date: Wed, 21 Oct 2015 11:16:53 -0700

> otherwise we need to compare res with pbm->mem_space or pbm->mem64_space
> to get direct parent for request_resource_conflict() calling in
> pci_register_legacy_regions().

Right, this is the issue.

On sparc64, the cpu physical base address used for accessing 64-bit
and non-64-bit memory spaces is different.

And that's why the resource values will be different.