irqchip: bcm7120-l2: enable interrupt pipelining

Fixup Broadcom's BCM7120 (Level 2) interrupt controller driver in
order to channel interrupts through the interrupt pipeline.

drivers/irqchip/irq-bcm7120-l2.c

@@ -61,6 +61,7 @@ static void bcm7120_l2_intc_irq_handle(struct irq_desc *desc)
 	struct bcm7120_l2_intc_data *b = data->b;
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 	unsigned int idx;
+	unsigned long flags;
 
 	chained_irq_enter(chip, desc);
 
@@ -71,11 +72,11 @@ static void bcm7120_l2_intc_irq_handle(struct irq_desc *desc)
 		unsigned long pending;
 		int hwirq;
 
-		irq_gc_lock(gc);
+		flags = irq_gc_lock(gc);
 		pending = irq_reg_readl(gc, b->stat_offset[idx]) &
 					    gc->mask_cache &
 					    data->irq_map_mask[idx];
-		irq_gc_unlock(gc);
+		irq_gc_unlock(gc, flags);
 
 		for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) {
 			generic_handle_irq(irq_find_mapping(b->domain,
@@ -90,22 +91,24 @@ static void bcm7120_l2_intc_suspend(struct irq_chip_generic *gc)
 {
 	struct bcm7120_l2_intc_data *b = gc->private;
 	struct irq_chip_type *ct = gc->chip_types;
+        unsigned long flags;
 
-	irq_gc_lock(gc);
+	flags = irq_gc_lock(gc);
 	if (b->can_wake)
 		irq_reg_writel(gc, gc->mask_cache | gc->wake_active,
 			       ct->regs.mask);
-	irq_gc_unlock(gc);
+	irq_gc_unlock(gc, flags);
 }
 
 static void bcm7120_l2_intc_resume(struct irq_chip_generic *gc)
 {
 	struct irq_chip_type *ct = gc->chip_types;
+        unsigned long flags;
 
 	/* Restore the saved mask */
-	irq_gc_lock(gc);
+	flags = irq_gc_lock(gc);
 	irq_reg_writel(gc, gc->mask_cache, ct->regs.mask);
-	irq_gc_unlock(gc);
+	irq_gc_unlock(gc, flags);
 }
 
 static int bcm7120_l2_intc_init_one(struct device_node *dn,