From: "Kyungmin Park" <kyungmin.park@samsung.com>

After kernel 2.6.21, the qemu of mips with nfsroot is not working.

There are too much WATCHDOG timeout.

I try to find what makes it not working and I found it.  After Ingo
Monlar's patch "[PATCH] genirq: do not mask interrupts by default" [1],
it's not working.  To solve this, we also have to register the IRQ disable
field in MIPS, as x86 does.

1. http://www.uwsg.iu.edu/hypermail/linux/kernel/0701.3/1892.html

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/mips/kernel/i8259.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN arch/mips/kernel/i8259.c~mips-qemu-network-work-again arch/mips/kernel/i8259.c
--- a/arch/mips/kernel/i8259.c~mips-qemu-network-work-again
+++ a/arch/mips/kernel/i8259.c
@@ -36,6 +36,7 @@ void mask_and_ack_8259A(unsigned int);
 static struct irq_chip i8259A_chip = {
 	.name		= "XT-PIC",
 	.mask		= disable_8259A_irq,
+	.disable	= disable_8259A_irq,
 	.unmask		= enable_8259A_irq,
 	.mask_ack	= mask_and_ack_8259A,
 #ifdef CONFIG_MIPS_MT_SMTC_IRQAFF
_