Merge branch 'irq-fix' of git://www.modarm9.com/gitsrc/pub/people/ukleinek/linux-2.6.git

arch/arm/mach-ns9xxx/irq.c

@@ -62,7 +62,7 @@ static struct irq_chip ns9xxx_chip = {
 #if 0
 #define handle_irq handle_level_irq
 #else
-void handle_prio_irq(unsigned int irq, struct irq_desc *desc)
+static void handle_prio_irq(unsigned int irq, struct irq_desc *desc)
 {
 	unsigned int cpu = smp_processor_id();
 	struct irqaction *action;
@@ -70,27 +70,35 @@ void handle_prio_irq(unsigned int irq, struct irq_desc *desc)
 
 	spin_lock(&desc->lock);
 
-	if (unlikely(desc->status & IRQ_INPROGRESS))
-		goto out_unlock;
+	BUG_ON(desc->status & IRQ_INPROGRESS);
 
 	desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
 	kstat_cpu(cpu).irqs[irq]++;
 
 	action = desc->action;
 	if (unlikely(!action || (desc->status & IRQ_DISABLED)))
-		goto out_unlock;
+		goto out_mask;
 
 	desc->status |= IRQ_INPROGRESS;
 	spin_unlock(&desc->lock);
 
 	action_ret = handle_IRQ_event(irq, action);
 
+	/* XXX: There is no direct way to access noirqdebug, so check
+	 * unconditionally for spurious irqs...
+	 * Maybe this function should go to kernel/irq/chip.c? */
+	note_interrupt(irq, desc, action_ret);
+
 	spin_lock(&desc->lock);
 	desc->status &= ~IRQ_INPROGRESS;
-	if (!(desc->status & IRQ_DISABLED) && desc->chip->ack)
-		desc->chip->ack(irq);
 
-out_unlock:
+	if (desc->status & IRQ_DISABLED)
+out_mask:
+		desc->chip->mask(irq);
+
+	/* ack unconditionally to unmask lower prio irqs */
+	desc->chip->ack(irq);
+
 	spin_unlock(&desc->lock);
 }
 #define handle_irq handle_prio_irq