1 files changed, 11 insertions, 5 deletions

diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index 4debb4514634..2f7d45bcbd24 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -52,6 +52,7 @@ struct mtd_oob_buf64 {
 #define MTD_NANDFLASH           4
 #define MTD_DATAFLASH           6
 #define MTD_UBIVOLUME           7
+#define MTD_MLCNANDFLASH        8
 
 #define MTD_WRITEABLE           0x400   /* Device is writeable */
 #define MTD_BIT_WRITEABLE       0x800   /* Single bits can be flipped */
@@ -119,7 +120,7 @@ struct otp_info {
 #define OTPGETREGIONCOUNT       _IOW('M', 14, int)
 #define OTPGETREGIONINFO        _IOW('M', 15, struct otp_info)
 #define OTPLOCK                 _IOR('M', 16, struct otp_info)
-#define ECCGETLAYOUT            _IOR('M', 17, struct nand_ecclayout)
+#define ECCGETLAYOUT            _IOR('M', 17, struct nand_ecclayout_user)
 #define ECCGETSTATS             _IOR('M', 18, struct mtd_ecc_stats)
 #define MTDFILEMODE             _IO('M', 19)
 #define MEMERASE64              _IOW('M', 20, struct erase_info_user64)
@@ -144,13 +145,18 @@ struct nand_oobfree {
 };
 
 #define MTD_MAX_OOBFREE_ENTRIES 8
+#define MTD_MAX_ECCPOS_ENTRIES  64
 /*
- * ECC layout control structure. Exported to userspace for
- * diagnosis and to allow creation of raw images
+ * OBSOLETE: ECC layout control structure. Exported to user-space via ioctl
+ * ECCGETLAYOUT for backwards compatbility and should not be mistaken as a
+ * complete set of ECC information. The ioctl truncates the larger internal
+ * structure to retain binary compatibility with the static declaration of the
+ * ioctl. Note that the "MTD_MAX_..._ENTRIES" macros represent the max size of
+ * the user struct, not the MAX size of the internal struct nand_ecclayout.
  */
-struct nand_ecclayout {
+struct nand_ecclayout_user {
         __u32 eccbytes;
-        __u32 eccpos[64];
+        __u32 eccpos[MTD_MAX_ECCPOS_ENTRIES];
         __u32 oobavail;
         struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
 };