#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
#define MTDFILEMODE _IO('M', 19)
-+#define MTDREFRESH _IO('M', 23)
++#define MTDREFRESH _IO('M', 50)
/*
* Obsolete legacy interface. Keep it in order not to break userspace