ppc64: disable_irq fix from x86

diff --git a/arch/ppc64/kernel/irq.c b/arch/ppc64/kernel/irq.c
index d1b1af298f80a4744a07e9f157280ae631426453..05e65baef26af41bb34b31c290715011df579ae9 100644 (file)
--- a/arch/ppc64/kernel/irq.c
+++ b/arch/ppc64/kernel/irq.c
@@ -268,8 +268,10 @@ void free_irq(unsigned int irq, void *dev_id)
  
 void disable_irq(unsigned int irq)
 {
+       irq_desc_t *desc = irq_desc + irq;
        disable_irq_nosync(irq);
-       synchronize_irq(irq);
+       if (desc->action)
+               synchronize_irq(irq);
 }
 
 /**