ep = 0x86;
iface = usb_ifnum_to_if(dev, 2);
+ if (!iface || iface->num_altsetting == 0)
+ return -EINVAL;
+
+ alts = &iface->altsetting[1];
+ goto add_sync_ep;
+ case USB_ID(0x1397, 0x0002):
+ ep = 0x81;
+ iface = usb_ifnum_to_if(dev, 1);
+
if (!iface || iface->num_altsetting == 0)
return -EINVAL;