USBDEVFS_RELEASE_PORT 215 include/uapi/linux/usbdevice_fs.h #define USBDEVFS_RELEASE_PORT _IOR('U', 25, unsigned int) USBDEVFS_RELEASE_PORT 215 tools/include/uapi/linux/usbdevice_fs.h #define USBDEVFS_RELEASE_PORT _IOR('U', 25, unsigned int)