usb: dwc3: host: extract dwc3_host_get_irq()

Cleanup only, no functional changes.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/host.c

@@ -19,47 +19,59 @@
 
 #include "core.h"
 
-int dwc3_host_init(struct dwc3 *dwc)
+static int dwc3_host_get_irq(struct dwc3 *dwc)
 {
-	struct property_entry	props[2];
-	struct platform_device	*xhci;
-	int			ret, irq;
-	struct resource		*res;
 	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+	int irq;
 
 	irq = platform_get_irq_byname(dwc3_pdev, "host");
+	if (irq > 0)
+		goto out;
+
 	if (irq == -EPROBE_DEFER)
-		return irq;
+		goto out;
 
-	if (irq <= 0) {
 	irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
+	if (irq > 0)
+		goto out;
+
 	if (irq == -EPROBE_DEFER)
-			return irq;
+		goto out;
 
-		if (irq <= 0) {
 	irq = platform_get_irq(dwc3_pdev, 0);
-			if (irq <= 0) {
-				if (irq != -EPROBE_DEFER) {
-					dev_err(dwc->dev,
-						"missing host IRQ\n");
-				}
+	if (irq > 0)
+		goto out;
+
+	if (irq != -EPROBE_DEFER)
+		dev_err(dwc->dev, "missing host IRQ\n");
+
 	if (!irq)
 		irq = -EINVAL;
+
+out:
 	return irq;
-			} else {
-				res = platform_get_resource(dwc3_pdev,
-							    IORESOURCE_IRQ, 0);
-			}
-		} else {
-			res = platform_get_resource_byname(dwc3_pdev,
-							   IORESOURCE_IRQ,
-							   "dwc_usb3");
-		}
+}
 
-	} else {
+int dwc3_host_init(struct dwc3 *dwc)
+{
+	struct property_entry	props[2];
+	struct platform_device	*xhci;
+	int			ret, irq;
+	struct resource		*res;
+	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+
+	irq = dwc3_host_get_irq(dwc);
+	if (irq < 0)
+		return irq;
+
+	res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
+	if (!res)
 		res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
-						   "host");
-	}
+				"dwc_usb3");
+	if (!res)
+		res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
+	if (!res)
+		return -ENOMEM;
 
 	dwc->xhci_resources[1].start = irq;
 	dwc->xhci_resources[1].end = irq;