[PATCH] irq: mask irq before move it

[Yinghai Lu <yinghai@kernel.org>]

Imapct: fix panic

try to mask the irq, before move the irq desc

Signed-off-by: Yinghai Lu <yinghai@kernel.org>

---
 kernel/irq/numa_migrate.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

Index: linux-2.6/kernel/irq/numa_migrate.c
===================================================================
--- linux-2.6.orig/kernel/irq/numa_migrate.c
+++ linux-2.6/kernel/irq/numa_migrate.c
@@ -112,17 +112,21 @@ struct irq_desc *move_irq_desc(struct ir
 {
 	int old_cpu;
 	int node, old_node;
+	unsigned int irq = desc->irq;
 
 	/* those all static, do move them */
-	if (desc->irq < NR_IRQS_LEGACY)
+	if (irq < NR_IRQS_LEGACY)
 		return desc;
 
 	old_cpu = desc->cpu;
 	if (old_cpu != cpu) {
 		node = cpu_to_node(cpu);
 		old_node = cpu_to_node(old_cpu);
-		if (old_node != node)
+		if (old_node != node) {
+			desc->chip->mask(irq);
 			desc = __real_move_irq_desc(desc, cpu);
+			desc->chip->unmask(irq);
+		}
 		else
 			desc->cpu = cpu;
 	}