Section was not properly computed. The value of OOB region definition is always ECC section 0 information in the OOB area, but we want to get all the ECC bytes information, so we should call mtd_ooblayout_ecc(mtd, section++, &oobregion) until it returns -ERANGE.
This is fixed by using i instead of section. Signed-off-by: OuYang ZhiZhong <oyzhizh...@gmail.com> --- drivers/mtd/mtdchar.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index de8c902..0cc929e 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -468,7 +468,7 @@ static int shrink_ecclayout(struct mtd_info *mtd, struct nand_ecclayout_user *to) { struct mtd_oob_region oobregion; - int i, section = 0, ret; + int i, ret; if (!mtd || !to) return -EINVAL; @@ -479,7 +479,7 @@ static int shrink_ecclayout(struct mtd_info *mtd, for (i = 0; i < MTD_MAX_ECCPOS_ENTRIES;) { u32 eccpos; - ret = mtd_ooblayout_ecc(mtd, section, &oobregion); + ret = mtd_ooblayout_ecc(mtd, i, &oobregion); if (ret < 0) { if (ret != -ERANGE) return ret; @@ -515,7 +515,7 @@ static int shrink_ecclayout(struct mtd_info *mtd, static int get_oobinfo(struct mtd_info *mtd, struct nand_oobinfo *to) { struct mtd_oob_region oobregion; - int i, section = 0, ret; + int i, ret; if (!mtd || !to) return -EINVAL; @@ -526,7 +526,7 @@ static int get_oobinfo(struct mtd_info *mtd, struct nand_oobinfo *to) for (i = 0; i < ARRAY_SIZE(to->eccpos);) { u32 eccpos; - ret = mtd_ooblayout_ecc(mtd, section, &oobregion); + ret = mtd_ooblayout_ecc(mtd, i, &oobregion); if (ret < 0) { if (ret != -ERANGE) return ret; -- 1.7.9.5