linux-kernel - Re: [PATCH v3 14/25] irq_domain: Remove irq_domain_add

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Message-ID: <20120131135821.GA24804@S2100-06.ap.freescale.net>
Date:	Tue, 31 Jan 2012 21:58:22 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Rob Herring <robherring2@...il.com>
CC:	Shawn Guo <shawn.guo@...aro.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	<linux-kernel@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Milton Miller <miltonm@....com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v3 14/25] irq_domain: Remove irq_domain_add_simple()

On Tue, Jan 31, 2012 at 07:15:26AM -0600, Rob Herring wrote:
...
> >> --- a/arch/arm/mach-mx5/imx51-dt.c
> >> +++ b/arch/arm/mach-mx5/imx51-dt.c
> >> @@ -47,7 +47,7 @@ static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = {
> >>  static int __init imx51_tzic_add_irq_domain(struct device_node *np,
> >>  				struct device_node *interrupt_parent)
> >>  {
> >> -	irq_domain_add_simple(np, 0);
> >> +	irq_domain_add_legacy(np, 32, 0, 0, &irq_domain_simple_ops, NULL);
> >>  	return 0;
> >>  }
> >>  
> >> @@ -57,7 +57,7 @@ static int __init imx51_gpio_add_irq_domain(struct device_node *np,
> >>  	static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
> >>  
> >>  	gpio_irq_base -= 32;
> >> -	irq_domain_add_simple(np, gpio_irq_base);
> >> +	irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
> > 
> > The tzic on imx5 gets 128 irq lines rather than 32 here.  The current
> > code will make any hwirq that is > 32 hit the WARN_ON below in
> > irq_domain_legacy_revmap().
> 
> But this is the gpio controller code? Really this should be 4 domains,
> but this temp fix is probably fine until you use my generic irq chip
> support.
> 
Sorry.  The comment was put at the wrong place.  It should be against
imx51_tzic_add_irq_domain() just above.

-- 
Regards,
Shawn

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