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

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Message-ID: <CAE9FiQVguGRDbYxRW=KNW6ZnUE23ifHJN4WXrf03JZB_P+d21w@mail.gmail.com>
Date:	Mon, 6 Apr 2015 22:23:06 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
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 8:43 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> 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.

Good.

http://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=for-linus&id=f70899ff889a38f9697d3c153aaacaed25f501c3

Please consider to split that into two patches.
First one include changes in : include/linux/types.h and
Documentation/DMA-API-HOWTO.txt.
and you should be author for that.


>
>>> 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.

ok, will on that to have three patches cover them.

>
> 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.

Sure. That will affect all platform.

Thanks

Yinghai
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