diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c
index 1b44941574fa..3e6661bab54a 100644
--- a/drivers/gpio/gpio-altera.c
+++ b/drivers/gpio/gpio-altera.c
@@ -42,6 +42,11 @@ struct altera_gpio_chip {
 	int mapped_irq;
 };
 
+static struct altera_gpio_chip *to_altera(struct gpio_chip *gc)
+{
+	return container_of(gc, struct altera_gpio_chip, mmchip.gc);
+}
+
 static void altera_gpio_irq_unmask(struct irq_data *d)
 {
 	struct altera_gpio_chip *altera_gc;
@@ -49,7 +54,7 @@ static void altera_gpio_irq_unmask(struct irq_data *d)
 	unsigned long flags;
 	u32 intmask;
 
-	altera_gc = irq_data_get_irq_chip_data(d);
+	altera_gc = to_altera(irq_data_get_irq_chip_data(d));
 	mm_gc = &altera_gc->mmchip;
 
 	spin_lock_irqsave(&altera_gc->gpio_lock, flags);
@@ -67,7 +72,7 @@ static void altera_gpio_irq_mask(struct irq_data *d)
 	unsigned long flags;
 	u32 intmask;
 
-	altera_gc = irq_data_get_irq_chip_data(d);
+	altera_gc = to_altera(irq_data_get_irq_chip_data(d));
 	mm_gc = &altera_gc->mmchip;
 
 	spin_lock_irqsave(&altera_gc->gpio_lock, flags);
@@ -87,7 +92,7 @@ static int altera_gpio_irq_set_type(struct irq_data *d,
 {
 	struct altera_gpio_chip *altera_gc;
 
-	altera_gc = irq_data_get_irq_chip_data(d);
+	altera_gc = to_altera(irq_data_get_irq_chip_data(d));
 
 	if (type == IRQ_TYPE_NONE)
 		return 0;
@@ -210,7 +215,7 @@ static void altera_gpio_irq_edge_handler(struct irq_desc *desc)
 	unsigned long status;
 	int i;
 
-	altera_gc = irq_desc_get_handler_data(desc);
+	altera_gc = to_altera(irq_desc_get_handler_data(desc));
 	chip = irq_desc_get_chip(desc);
 	mm_gc = &altera_gc->mmchip;
 	irqdomain = altera_gc->mmchip.gc.irqdomain;
@@ -239,7 +244,7 @@ static void altera_gpio_irq_leveL_high_handler(struct irq_desc *desc)
 	unsigned long status;
 	int i;
 
-	altera_gc = irq_desc_get_handler_data(desc);
+	altera_gc = to_altera(irq_desc_get_handler_data(desc));
 	chip = irq_desc_get_chip(desc);
 	mm_gc = &altera_gc->mmchip;
 	irqdomain = altera_gc->mmchip.gc.irqdomain;