Message-ID: <54EBAD37.4020502@ti.com>
Date:	Mon, 23 Feb 2015 17:44:07 -0500
From:	Murali Karicheri <m-karicheri2@...com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Arnd Bergmann <arnd@...db.de>,
	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>,
	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 02/23/2015 05:15 PM, Bjorn Helgaas wrote:
> On Mon, Feb 23, 2015 at 4:08 PM, Murali Karicheri<m-karicheri2@...com>  wrote:
>> On 02/11/2015 11:58 AM, Murali Karicheri wrote:
>>>
>>> On 02/11/2015 11:54 AM, Murali Karicheri wrote:
>>>>
>>>> On 02/06/2015 01:36 PM, Murali Karicheri wrote:
>>>>>
>>>>> On 02/06/2015 12:53 PM, Bjorn Helgaas wrote:
>>>>>>
>>>>>> 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.
>>>>>
>>>>> Bjorn,
>>>>>
>>>>> Thanks for responding.
>>>>>
>>>>> Let me give you some context on this without which my explanation won't
>>>>> be complete. For using PCI driver on Keystone, I had submitted patches
>>>>> related to machine and DTS to the arm mailing list to enable the driver
>>>>> on Keystone. Subsequenty one of the patch from my series was Nack-ed and
>>>>> I was asked to implememented in a different way and started this series.
>>>>> You can refer to the discussion of this at
>>>>>
>>>>> http://www.gossamer-threads.com/lists/linux/kernel/2024591
>>>>>
>>>>> The PCI driver enablement on Keystone is still a working in progress and
>>>>> I am trying to get it fully functional on the upstream. Another missing
>>>>> piece is the SerDes phy driver patch. We have started working on the
>>>>> other part (SerDes phy driver) already as the initial one was not
>>>>> accepted. So it is fine if we are too late for the v3.20 merge window to
>>>>> merge this series and this can be applied to the next branch for v3.21.
>>>>>
>>>>>>
>>>>>> 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?
>>>>>>
>>>>>
>>>>> I am trying to get this driver enabled on Keystone by adding the missing
>>>>> pieces as described above. So I guess we don't have to back port
>>>>> anything here.
>>>>>
>>>>>> 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.
>>>>>
>>>>>
>>>>> Please apply this to next branch for v3.21. It currently apply cleanly
>>>>> to v3.19-rc7. If you want me rebase to another branch, let me know I can
>>>>> apply and send you an updated patch.
>>>>>
>>>> Bjorn, Arnd,
>>>>
>>>> I am assuming, Bjorn is going to merge this to his next branch for
>>>> v3.21. If not, it might have to be merged through the arm soc? There are
>>>> a couple of Tested-by and Acked-by received after v7. Do you want me to
>>>> post v8 with these updated in the patches?
>>>
>>> FYI.
>>>
>>> These are the updates.
>>> Series was
>>>
>>> 1) Tested-by: Suravee Suthikulpanit<Suravee.Suthikulpanit@....com>
>>> (on AMD Seattle platform w/ PCI Generic Host controller)
>>> 2) Acked-by: Will Deacon<will.deacon@....com>
>>> 3) Reviewed-by: Catalin Marinas<catalin.marinas@....com>
>>>
>> Bjorn,
>>
>> I haven't seen a reply from my above email. As soon as you are ready to pull
>> this to v4.1 next (originally requested for v3.21 as per above email)branch,
>> please let me know and I can send you an updated version rebased to your
>> next branch and with the above acks.
>
> My "next" and "for-linus" branches will be based on v4.0-rc1, so
> that's the ideal base for patches.  I don't expect any significant
> changes that would require a rebase, so unless something in your
> patches themselves has changed since you last posted them, you don't
> need to repost them just for a rebase.
>
Bjorn,

Thanks for the response.

Nothing from my side except for the above acks/tested-by/reviewed-by

Murali
> Bjorn


-- 
Murali Karicheri
Linux Kernel, Texas Instruments
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