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[PATCH] powerpc: Fix i8259 cascade IRQ 

setup_irq() aborts immediately if there's no handler for the IRQ in
question. So i8259_init() should set up its handlers before trying to
set up the cascade on IRQ 2.

With this and the patch I sent a few days ago to fix initrd on ppc32, my
Pegasos now runs the arch/powerpc kernel.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
David Woodhouse 2005-11-05 17:54:22 +00:00 committed by Paul Mackerras
parent ead837174d
commit 9d2ba6faa1
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/sysdev/i8259.c
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@ -207,6 +207,9 @@ void __init i8259_init(unsigned long intack_addr, int offset)
spin_unlock_irqrestore(&i8259_lock, flags);
for (i = 0; i < NUM_ISA_INTERRUPTS; ++i)
irq_desc[offset + i].handler = &i8259_pic;
/* reserve our resources */
setup_irq(offset + 2, &i8259_irqaction);
request_resource(&ioport_resource, &pic1_iores);
@ -216,6 +219,4 @@ void __init i8259_init(unsigned long intack_addr, int offset)
if (intack_addr != 0)
pci_intack = ioremap(intack_addr, 1);
for (i = 0; i < NUM_ISA_INTERRUPTS; ++i)
irq_desc[offset + i].handler = &i8259_pic;
}