linux-kernel - Re: [PATCH] spi: tegra: sequence compatible strings as per preference

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Message-Id: <20121219170009.54EE83E0C34@localhost>
Date:	Wed, 19 Dec 2012 17:00:09 +0000
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Thierry Reding <thierry.reding@...onic-design.de>,
	Stephen Warren <swarren@...dotorg.org>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"spi-devel-general@...ts.sourceforge.net" 
	<spi-devel-general@...ts.sourceforge.net>,
	Laxman Dewangan <ldewangan@...dia.com>,
	Stephen Warren <swarren@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <rob.herring@...xeda.com>
Subject: Re: [PATCH] spi: tegra: sequence compatible strings as per preference

On Sat, 10 Nov 2012 18:07:42 +0100, Thierry Reding <thierry.reding@...onic-design.de> wrote:
> On Fri, Nov 09, 2012 at 10:28:38AM -0700, Stephen Warren wrote:
> > On 11/09/2012 10:10 AM, Mark Brown wrote:
> > > On Fri, Nov 09, 2012 at 10:04:56AM -0700, Stephen Warren wrote:
> > > 
> > >> However just FYI, it should not be necessary for correctness; The
> > >> DT matching order is supposed to be driven purely by the order of
> > >> the compatible values in the DT now, and not affected by the
> > >> order of values in the table. (This wasn't always the case, but
> > >> was a bug that was fixed IIRC by Thierry Reding).
> > > 
> > > I guess the driver is being used backported in older kernels which
> > > don't have that fix?
> > 
> > That sounds likely. Laxman, it'd be a good idea to track down the fix
> > to the DT matching code and backport it, so that hard-to debug issues
> > aren't caused by the lack of that patch!
> 
> Unfortunately the patch that was supposed to fixed this caused a
> regression and was therefore reverted. Rob (Cc'ed) said there was a
> patch to fix it properly and was supposed to go into 3.6 but it seems
> that never happened. Rob, what's the status on this?
> 
> The revert is here: bc51b0c22cebf5c311a6f1895fcca9f78efd0478

Rob, ping on this. I think we talked about it on IRC, but I cannot
remember what was said.... I must be getting old.

g.

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