linux-kernel - Re: [RFC part2 PATCH 8/9] ACPI / ARM64: Update acpi_register_gsi to register with the core IRQ subsystem

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Message-Id: <20140120143625.EB0E2C40B12@trevor.secretlab.ca>
Date:	Mon, 20 Jan 2014 14:36:25 +0000
From:	Grant Likely <grant.likely@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
Cc:	Hanjun Guo <hanjun.guo@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	linaro-kernel@...ts.linaro.org, patches@...aro.org,
	linaro-acpi@...ts.linaro.org, linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	linux-acpi@...r.kernel.org,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [RFC part2 PATCH 8/9] ACPI / ARM64: Update acpi_register_gsi to register with the core IRQ subsystem

On Wed, 11 Dec 2013 06:23:04 +0100, Arnd Bergmann <arnd@...db.de> wrote:
> On Tuesday 10 December 2013, Grant Likely wrote:
> > > --- a/drivers/acpi/plat/arm-core.c
> > > +++ b/drivers/acpi/plat/arm-core.c
> > > @@ -90,7 +90,7 @@ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_GIC;
> > >  
> > >  static unsigned int gsi_to_irq(unsigned int gsi)
> > >  {
> > > -     int irq = irq_create_mapping(NULL, gsi);
> > > +     int irq = irq_find_mapping(NULL, gsi);
> > 
> > I suspect this will break FDT users that depend on the old behaviour.
> 
> I think not, given this is only in drivers/acpi and gets added in one
> of the prior patches of the same series.

Ah, okay.

g.

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