Message-ID: <20150814092237.3551c03e@canb.auug.org.au>
Date:	Fri, 14 Aug 2015 09:22:37 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Olof Johansson <olof@...om.net>
Cc:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Arnd Bergmann <arnd@...db.de>, arm@...nel.org,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] at91: defconfig for 4.3 #2

Hi Olof,

On Thu, 13 Aug 2015 14:26:43 +0200 Olof Johansson <olof@...om.net> wrote:
>
> On Thu, Aug 13, 2015 at 01:21:18PM +0200, Alexandre Belloni wrote:
> > On 13/08/2015 at 12:09:38 +0200, Olof Johansson wrote :
> > > On Fri, Aug 07, 2015 at 06:27:54PM +0200, Alexandre Belloni wrote:
> > > > 
> > > > A little defconfig update. That will probably be all for this cycle.
> > > > 
> > > > Thanks, bye,
> > > > 
> > > > 
> > > > The following changes since commit eff7f41572a645bf14a96a6f844be4f1c88cd9dd:
> > > > 
> > > >   ARM: at91: at91_dt_defconfig: enable ISI and ov2640 support (2015-07-30 14:17:31 +0200)
> > > > 
> > > > are available in the git repository at:
> > > > 
> > > >   git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git tags/at91-ab-defconfig2
> > > > 
> > > > for you to fetch changes up to ea7bf603fd494391acc1f42acbfc34260b965c44:
> > > > 
> > > >   ARM: at91/defconfig: at91_dt: remove ARM_AT91_ETHER (2015-08-07 12:07:50 +0200)
> > > 
> > > Nicolas had sent me one patch which you've also included here but it's not in
> > > the pull request ("enable ISI and ov2640 support"). That caused a conflict
> > > here, so to avoid having the patch in the tree twice I instead also directly
> > > applied your patches from this branch instead of merging.
> > > 
> > > Sorry about that, it started due to Nicolas sending the discrete patch to us.
> > > So it seems like we'll apply at91 defconfig updates directly this release, in
> > > case there are any more. No big deal I hope. :)
> > 
> > That's not a big deal and there will most probably be all for that cycle
> > anyway.
> > 
> > However, I'm wondering how I should have done. From the PR, if you get
> > eff7f41572a645bf14a96a6f844be4f1c88cd9dd..tags/at91-ab-defconfig2, it
> > correctly excludes "enable ISI and ov2640 support" so I was thinking it
> > was fine.
> > Be cause the first patch was taken as a patch, should I have prepared a
> > branch without it?
> 
> Yeah, you could have applied the other two if there were no conflicts. If there
> were conflicts then it gets complicated, and the best answer would probably
> have been to continue applying directly as patches.
> 
> This is the drawback of us sometimes applying patches directly -- when we do,
> we no longer put them on a branch of their own that you can use as base. We
> used to once upon a time but it is quite a bit of overhead for us and the
> upside was pretty limited.

The only thing now is that since the at91 tree is in linux-next as well
as the arm-soc tree, those patches appear twice there and there is a
conflict (easy to fix, but a pain).  The solution here is to update the
at91 tree to be somewhere in the arm-soc tree (probably just reset to
the point where the two trees match in patches but not commits).  This
has the downside that the at91 tree will be rebased which will affect
any development work that is based on that.

If there was just one patch in common, it maybe have been better to
just merge the at91 tree and fix the conflict in the merge.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
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