Make the fasteoi handler mark disabled interrupts as pending if they
happen anyway. This allow implementation of a delayed disable scheme
with the fasteoi handler

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Index: linux-irq-work/kernel/irq/chip.c
===================================================================
--- linux-irq-work.orig/kernel/irq/chip.c	2006-07-01 15:25:11.000000000 +1000
+++ linux-irq-work/kernel/irq/chip.c	2006-07-01 15:25:31.000000000 +1000
@@ -261,10 +261,13 @@
 	 * keep it masked and get out of here
 	 */
 	action = desc->action;
-	if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+	if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
+		desc->status |= IRQ_PENDING;
 		goto out;
+	}
 
 	desc->status |= IRQ_INPROGRESS;
+	desc->status &= ~IRQ_PENDING;
 	spin_unlock(&desc->lock);
 
 	action_ret = handle_IRQ_event(irq, regs, action);