USB_FS_OPEN_STREAM
if (ioctl(xfer->pdev->file, IOUSB(USB_FS_OPEN_STREAM), &temp.fs_open_stream))
args->cmd = USB_FS_OPEN_STREAM;
case USB_FS_OPEN_STREAM:
(cmd == USB_FS_OPEN_STREAM) ? u.popen_stream->stream_id : 0);