linux-kernel - Re: [PATCH 3/3] PCI: Set pref for mem64 resource of pcie device

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Message-ID: <CAErSpo6au3nWwNJCQBOLV=9=5Jy5=MKnky4LLjThKf8J7MJfdg@mail.gmail.com>
Date:	Mon, 6 Apr 2015 22:43:20 -0500
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	David Miller <davem@...emloft.net>,
	David Ahern <david.ahern@...cle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH 3/3] PCI: Set pref for mem64 resource of pcie device

On Mon, Apr 6, 2015 at 8:13 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Mon, Apr 6, 2015 at 3:49 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>>
>> For "[PATCH 1/3] PCI: Introduce pci_bus_addr_t", I'm waiting for an updated
>> version with Kconfig tweaks so we don't break other arches.
>
> I was thinking that you will update it manually.

I asked you for an updated version, incorporating the documentation
updates, to make sure I got everything you intended.  But I did go
ahead and do it manually for you.

>> For "[PATCH 2/3] sparc/PCI: Add mem64 resource parsing for root bus", I'm
>> waiting for a version that fixes the other of_bus_pci_get_flags() and
>> pci_parse_of_flags() implementations at the same time (or an explanation
>> about why we should fix only the arch/sparc version).  I don't want to fix
>> one place and leave the same bug in other places.
>
> I don't even know if other arch like powerpc support 64-bit bus address.
>
> No one from powerpc reported a problem, why should we mess it up now?
>
> I would like to see someone get access those three kinds of machine that support
> of to unify of support code.

Of course changes there should be tested on all the affected machines.
I opened https://bugzilla.kernel.org/show_bug.cgi?id=96241 and
assigned it to you as a reminder that there is nearly identical code
in several other places that may have the same issue.

I pushed these two changes to for-linus.  I'll work on the third
tomorrow.  The current changelog is very sparc64-centric, and it needs
to be much more explicit about how the change will affect every arch.

Bjorn
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