Index: linux-2.6/arch/powerpc/sysdev/mpic.c
===================================================================
--- linux-2.6.orig/arch/powerpc/sysdev/mpic.c
+++ linux-2.6/arch/powerpc/sysdev/mpic.c
@@ -1323,8 +1323,9 @@ void __init mpic_init(struct mpic *mpic)
 			continue;
 		/* init hw */
 		mpic_irq_write(i, MPIC_INFO(IRQ_VECTOR_PRI), vecpri);
-		mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
-			       1 << hard_smp_processor_id());
+		if (mpic->flags & MPIC_PRIMARY)
+			mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
+				       1 << hard_smp_processor_id());
 	}
 	
 	/* Init spurious vector */