AX88796: ax_probe() fix irq assignment

dev->irq is unsigned
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/ax88796.c

@@ -838,12 +838,12 @@ static int ax_probe(struct platform_device *pdev)
 
 	/* find the platform resources */
 
-	dev->irq  = platform_get_irq(pdev, 0);
-	if (dev->irq < 0) {
+	ret  = platform_get_irq(pdev, 0);
+	if (ret < 0) {
 		dev_err(&pdev->dev, "no IRQ specified\n");
-		ret = -ENXIO;
 		goto exit_mem;
 	}
+	dev->irq = ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res == NULL) {