[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>
diff --git a/arch/powerpc/sysdev/i8259.c b/arch/powerpc/sysdev/i8259.c
index 90bce6e..b7ac32f 100644
--- a/arch/powerpc/sysdev/i8259.c
+++ b/arch/powerpc/sysdev/i8259.c
@@ -207,6 +207,9 @@
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 @@
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;
}