--- zzzz-none-000/linux-4.4.60/include/uapi/mtd/ubi-user.h	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/include/uapi/mtd/ubi-user.h	2021-02-04 17:41:59.000000000 +0000
@@ -178,6 +178,7 @@
 #define UBI_IOCATT _IOW(UBI_CTRL_IOC_MAGIC, 64, struct ubi_attach_req)
 /* Detach an MTD device */
 #define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, __s32)
+#define UBI_IOCFDET _IOW(UBI_CTRL_IOC_MAGIC, 99, __s32)
 
 /* ioctl commands of UBI volume character devices */