linux-kernel - Re: [PATCH v6 0/7] PCI: get DMA configuration from parent device

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Message-ID: <CAErSpo6GOXHeKKfU8s5jCS3+Mui=HupZd=jpkLEyWAE94Ory5w@mail.gmail.com>
Date:	Fri, 6 Feb 2015 11:53:35 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Murali Karicheri <m-karicheri2@...com>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, Joerg Roedel <joro@...tes.org>,
	Will Deacon <Will.Deacon@....com>,
	Rob Herring <robh+dt@...nel.org>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>
Subject: Re: [PATCH v6 0/7] PCI: get DMA configuration from parent device

On Fri, Feb 6, 2015 at 9:28 AM, Murali Karicheri <m-karicheri2@...com> wrote:
> On 02/06/2015 10:15 AM, Catalin Marinas wrote:
>>
>> On Thu, Feb 05, 2015 at 09:52:52PM +0000, Murali Karicheri wrote:
>>>
>>> This patch add an important capability to PCI driver on Keystone. I hope
>>> to
>>> have this merged to the upstream branch so that it is available for
>>> v3.20.
>>
>> It's very late for 3.20 and the code hasn't been in linux-next at all
>> (but it's not me who's merging this code), unless you can squeeze it in
>> as a bug-fix.
>
> This is in fact a bug fix as PCI on Keystone is broken without this.

Oh, sorry, I didn't realize that this was so urgent.  I guess I read
"this adds an important capability" in the cover letter and concluded
that it was new functionality.

Anyway, if it's broken, presumably PCI on Keystone *did* work at one
point.  Can you identify the commit that broke it and requires these
fixes, so we can figure out how far the fixes need to be backported?

If I merge it, I would like to get into my for-linus branch and get a
little time in -next before asking Linus to pull it.  The merge window
is a little wrinkle there -- I don't like to add new things to the mix
during the window.  But if it's an important fix we can still get it
in before the final v3.20.

Bjorn
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