irqchip: bcm7120-l2: Use gc->mask_cache to simplify suspend/resume functions

The cached value already incorporates irq_fwd_mask, and was saved the
last time an IRQ was enabled/disabled.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/1415342669-30640-11-git-send-email-cernekee@gmail.comSigned-off-by: Jason Cooper <jason@lakedaemon.net>

drivers/irqchip/irq-bcm7120-l2.c

@@ -37,7 +37,6 @@ struct bcm7120_l2_intc_data {
 	bool can_wake;
 	u32 irq_fwd_mask;
 	u32 irq_map_mask;
-	u32 saved_mask;
 };
 
 static void bcm7120_l2_intc_irq_handle(unsigned int irq, struct irq_desc *desc)
@@ -62,14 +61,11 @@ static void bcm7120_l2_intc_suspend(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct bcm7120_l2_intc_data *b = gc->private;
-	u32 reg;
 
 	irq_gc_lock(gc);
-	/* Save the current mask and the interrupt forward mask */
-	b->saved_mask = __raw_readl(b->base + IRQEN) | b->irq_fwd_mask;
 	if (b->can_wake) {
-		reg = b->saved_mask | gc->wake_active;
-		__raw_writel(reg, b->base + IRQEN);
+		__raw_writel(gc->mask_cache | gc->wake_active,
+			     b->base + IRQEN);
 	}
 	irq_gc_unlock(gc);
 }
@@ -77,11 +73,10 @@ static void bcm7120_l2_intc_suspend(struct irq_data *d)
 static void bcm7120_l2_intc_resume(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	struct bcm7120_l2_intc_data *b = gc->private;
 
 	/* Restore the saved mask */
 	irq_gc_lock(gc);
-	__raw_writel(b->saved_mask, b->base + IRQEN);
+	__raw_writel(gc->mask_cache, b->base + IRQEN);
 	irq_gc_unlock(gc);
 }