linux-kernel - Re: linux-next: manual merge of the arm-soc tree with the usb tree

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Date:	Tue, 27 Aug 2013 08:01:18 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Benoit Cousson <bcousson@...libre.com>
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Javier Martinez Canillas <javier@...hile0.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Greg KH <greg@...ah.com>, Arnd Bergmann <arnd@...db.de>,
	linux-kernel@...r.kernel.org, Felipe Balbi <balbi@...com>,
	linux-next@...r.kernel.org, Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: linux-next: manual merge of the arm-soc tree with the usb tree

Benoit Cousson <bcousson@...libre.com> writes:

> + Kevin,
>
> On 27/08/2013 15:53, Sebastian Andrzej Siewior wrote:
>> On 08/27/2013 03:24 PM, Benoit Cousson wrote:
>>> Hi Sebatian,
>>
>> Hi Benoit,
>>
>>> Yes. DT patches are an endless source of merge conflicts if they are
>>> merge throught different trees.
>>
>> Usually there are small conflicts because two people added / changed a
>> node nearby. This patch turned the .dts file almost upside down.
>
> Yes, that's true.
>
>>> What was discussed with Olof and Arnd during Connect is that we should
>>> avoid merging DT patches outside arm-soc tree to avoid that kind of
>>> situation.
>>
>> I am aware of this now. However these changes belonged together because
>> a) they belonged together and b) would break the driver until the .dts
>> changes and driver code is in-sync.
>> In future I am going to ask you for a topic branch so I can get my
>> changes in one piece without breaking stuff in the middle.
>>
>> What do we do now?
>
> Cannot you just merge the stable arm-soc/dt branch into your branch
> before applying your patches?

Unfortunately, the next/dt branch of arm-soc is not necessarily stable
so should *not* be merged.  In fact none of the arm-soc branches should
be considered stable.

As was already mentioned, this should be split up into driver changes
and DTS changes through arm-soc.  They'll both merge for v3.12.

BTW, how did this patch get merged without a signoff/ack from the OMAP
DT maintainer in the first place?  Hmm, looks like Benoit was not copied
nor was linux-omap or linux-arm-kernel copied in the original mails.

Kevin
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