Index: usb-devel/drivers/usb/core/driver.c
===================================================================
--- usb-devel.orig/drivers/usb/core/driver.c
+++ usb-devel/drivers/usb/core/driver.c
@@ -358,7 +358,11 @@ static int usb_probe_interface(struct de
 		intf->needs_altsetting0 = 0;
 	}
 
+	dev_info(&intf->dev, "Refcount before probe: %d\n",
+			refcount_read(&intf->dev.kobj.kref.refcount));
 	error = driver->probe(intf, id);
+	dev_info(&intf->dev, "Refcount after probe: %d\n",
+			refcount_read(&intf->dev.kobj.kref.refcount));
 	if (error)
 		goto err;