--- a/drivers/irqchip/irq-bcm6345-periph.c
+++ b/drivers/irqchip/irq-bcm6345-periph.c
@@ -240,6 +240,9 @@ static int __init __bcm6345_periph_intc_
 			/* route all interrupts to line 0 by default */
 			if (i == 0)
 				block->mask_cache[w] = 0xffffffff;
+
+			/* mask all interrupts */
+			__raw_writel(0, block->en_reg[w]);
 		}
 
 		irq_set_handler_data(block->parent_irq, data);