From: Boris Brezillon Date: Fri, 25 Nov 2016 10:32:32 +0000 (+0100) Subject: mtd: nand: mxc: Fix mxc_v1 ooblayout X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3bff08dffe3115a25ce04b95ea75f6d868572c60;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git mtd: nand: mxc: Fix mxc_v1 ooblayout Commit a894cf6c5a82 ("mtd: nand: mxc: switch to mtd_ooblayout_ops") introduced a bug in the OOB layout description. Even if the driver claims that 3 ECC bytes are reserved to protect 512 bytes of data, it's actually 5 ECC bytes to protect 512+6 bytes of data (some OOB bytes are also protected using extra ECC bytes). Fix the mxc_v1_ooblayout_{free,ecc}() functions to reflect this behavior. Signed-off-by: Boris Brezillon Fixes: a894cf6c5a82 ("mtd: nand: mxc: switch to mtd_ooblayout_ops") Cc: Signed-off-by: Boris Brezillon --- diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index a764d5ca7536..5bedf7bc3d88 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -876,6 +876,8 @@ static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr) } } +#define MXC_V1_ECCBYTES 5 + static int mxc_v1_ooblayout_ecc(struct mtd_info *mtd, int section, struct mtd_oob_region *oobregion) { @@ -885,7 +887,7 @@ static int mxc_v1_ooblayout_ecc(struct mtd_info *mtd, int section, return -ERANGE; oobregion->offset = (section * 16) + 6; - oobregion->length = nand_chip->ecc.bytes; + oobregion->length = MXC_V1_ECCBYTES; return 0; } @@ -907,8 +909,7 @@ static int mxc_v1_ooblayout_free(struct mtd_info *mtd, int section, oobregion->length = 4; } } else { - oobregion->offset = ((section - 1) * 16) + - nand_chip->ecc.bytes + 6; + oobregion->offset = ((section - 1) * 16) + MXC_V1_ECCBYTES + 6; if (section < nand_chip->ecc.steps) oobregion->length = (section * 16) + 6 - oobregion->offset;