linux-kernel - Re: Boot breaks in -next from LEGACY to LINEAR conversion

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Message-ID: <20120718161023.GE4495@opensource.wolfsonmicro.com>
Date:	Wed, 18 Jul 2012 17:10:23 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	Paul Mundt <lethal@...ux-sh.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <rob.herring@...xeda.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: Boot breaks in -next from LEGACY to LINEAR conversion

On Tue, Jul 17, 2012 at 07:57:49PM +0100, Mark Brown wrote:
> -next fails to boot for me today on my s3c64xx based systems.  Walking
> back to the last time I tried and bisecting likely branches I find that
> commit 910139 (irqdomain: Replace LEGACY mapping with LINEAR) is the one
> that introduces the build break.  Unfortunately the boot fails before I
> get a console which makes diagnosis somewhat more tricky than would be
> ideal.  Any ideas?

Further data: the irq_domain_associate_many() calls that we're now doing
are also causing WARN_ON()s to go off during boot after commit 98aa46
(irqdomain: Support for static IRQ mapping and association) causing
breakage for my interrupt using MFDs.

I don't really have time to investigate now but backing out that commit
seems to make things much happier, I suspect there's some collision with
IRQs allocated statically by the platform but I don't immediately see
what's new here.

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