#define FOURTHCHAR ((unsigned char *)(urb->transfer_buffer))[i + 3]
#define FIFTHCHAR ((unsigned char *)(urb->transfer_buffer))[i + 4]
-static struct usb_device_id quausb2_id_table[] = {
+static const struct usb_device_id quausb2_id_table[] = {
{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)},
{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)},
{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)},