#include <linux/tty.h>
#include <linux/module.h>
#include <linux/usb.h>
+
+#ifdef CONFIG_USB_SERIAL_DEBUG
+ static int debug = 1;
+#else
+ static int debug;
+#endif
+
#include "usb-serial.h"
static int usb_serial_device_match (struct device *dev, struct device_driver *drv)