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-rw-r--r--include/mtd/mtd-abi.h11
1 files changed, 8 insertions, 3 deletions
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index 5bce083..a57c4cb 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -144,13 +144,18 @@ 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_user {
__u32 eccbytes;
- __u32 eccpos[64];
+ __u32 eccpos[MTD_MAX_ECCPOS_ENTRIES];
__u32 oobavail;
struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
};
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