[PATCH] powerpc: Fix CHRP platforms with only 8259

[Michael Ellerman]

On Wed, 2006-10-25 at 12:54 +1000, Benjamin Herrenschmidt wrote:
> On CHRP platforms with only a 8259 controller, we should set the
> default IRQ host to the 8259 driver's one for the IRQ probing
> fallbacks to work in case the IRQ tree is incorrect (like on
> Pegasos for example). Without this fix, we get a bunch of WARN_ON's
> during boot.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> 
> 
> Index: linux-cell/arch/powerpc/platforms/chrp/setup.c
> ===================================================================
> --- linux-cell.orig/arch/powerpc/platforms/chrp/setup.c	2006-10-09 12:03:33.000000000 +1000
> +++ linux-cell/arch/powerpc/platforms/chrp/setup.c	2006-10-25 12:51:18.000000000 +1000
> @@ -477,8 +477,10 @@ static void __init chrp_find_8259(void)
>  		       " address, polling\n");
>  
>  	i8259_init(pic, chrp_int_ack);
> -	if (ppc_md.get_irq == NULL)
> +	if (ppc_md.get_irq == NULL) {
>  		ppc_md.get_irq = i8259_irq;
> +		irq_set_default_host(i8259_get_host());
> +	}
>  	if (chrp_mpic != NULL) {
>  		cascade_irq = irq_of_parse_and_map(pic, 0);
>  		if (cascade_irq == NO_IRQ)
> Index: linux-cell/arch/powerpc/sysdev/i8259.c
> ===================================================================
> --- linux-cell.orig/arch/powerpc/sysdev/i8259.c	2006-10-09 12:03:33.000000000 +1000
> +++ linux-cell/arch/powerpc/sysdev/i8259.c	2006-10-25 12:51:58.000000000 +1000
> @@ -13,6 +13,7 @@
>  #include <linux/interrupt.h>
>  #include <linux/kernel.h>
>  #include <linux/delay.h>
> +#include <linux/module.h>
>  #include <asm/io.h>
>  #include <asm/i8259.h>
>  #include <asm/prom.h>

You don't need module.h anymore do you ? :D

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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