gpiolib: Use IRQ hardware number getter instead of direct access

IRQ framework provides special type and getter to transform
the Linux IRQ to the hardware pin. Use that type and getter
function instead of direct access.

While at it, amend an indentation in a couple of places.

Signed-off-by: Andy Shevchenko <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Signed-off-by: Bartosz Golaszewski <[e-mail]>

drivers/gpio/gpiolib.c

···
 	if (ret)
 		return ret;
 
-	chip_dbg(gc, "allocate IRQ %d, hwirq %lu\n", irq,  hwirq);
+	chip_dbg(gc, "allocate IRQ %d, hwirq %lu\n", irq, hwirq);
 
 	ret = girq->child_to_parent_hwirq(gc, hwirq, type,
 					  &parent_hwirq, &parent_type);
···
  * gpiochip by assigning the gpiochip as chip data, and using the irqchip
  * stored inside the gpiochip.
  */
-int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
-		     irq_hw_number_t hwirq)
+int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq)
 {
 	struct gpio_chip *gc = d->host_data;
 	int ret = 0;
···
 				 struct irq_data *data, bool reserve)
 {
 	struct gpio_chip *gc = domain->host_data;
+	unsigned int hwirq = irqd_to_hwirq(data);
 
-	return gpiochip_lock_as_irq(gc, data->hwirq);
+	return gpiochip_lock_as_irq(gc, hwirq);
 }
 EXPORT_SYMBOL_GPL(gpiochip_irq_domain_activate);
 
···
 				    struct irq_data *data)
 {
 	struct gpio_chip *gc = domain->host_data;
+	unsigned int hwirq = irqd_to_hwirq(data);
 
-	return gpiochip_unlock_as_irq(gc, data->hwirq);
+	return gpiochip_unlock_as_irq(gc, hwirq);
 }
 EXPORT_SYMBOL_GPL(gpiochip_irq_domain_deactivate);
 
···
 int gpiochip_irq_reqres(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	return gpiochip_reqres_irq(gc, d->hwirq);
+	return gpiochip_reqres_irq(gc, hwirq);
 }
 EXPORT_SYMBOL(gpiochip_irq_reqres);
 
 void gpiochip_irq_relres(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_relres_irq(gc, d->hwirq);
+	gpiochip_relres_irq(gc, hwirq);
 }
 EXPORT_SYMBOL(gpiochip_irq_relres);
 
 static void gpiochip_irq_mask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
 	if (gc->irq.irq_mask)
 		gc->irq.irq_mask(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	gpiochip_disable_irq(gc, hwirq);
 }
 
 static void gpiochip_irq_unmask(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
+	gpiochip_enable_irq(gc, hwirq);
 	if (gc->irq.irq_unmask)
 		gc->irq.irq_unmask(d);
 }
···
 static void gpiochip_irq_enable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
+	gpiochip_enable_irq(gc, hwirq);
 	gc->irq.irq_enable(d);
 }
 
 static void gpiochip_irq_disable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	unsigned int hwirq = irqd_to_hwirq(d);
 
 	gc->irq.irq_disable(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	gpiochip_disable_irq(gc, hwirq);
 }
 
 static void gpiochip_set_irq_hooks(struct gpio_chip *gc)