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| author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-11-25 11:32:32 +0100 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-08-23 16:49:21 +0200 |
| commit | 3bff08dffe3115a25ce04b95ea75f6d868572c60 (patch) | |
| tree | 04d973768bb3404725ccc0ae8f5ed26bd465ada2 | |
| parent | fcf59f1ff525bc6400a893e2a0820afcf815f4c3 (diff) | |
| download | op-kernel-dev-3bff08dffe3115a25ce04b95ea75f6d868572c60.zip op-kernel-dev-3bff08dffe3115a25ce04b95ea75f6d868572c60.tar.gz | |
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 <boris.brezillon@free-electrons.com>
Fixes: a894cf6c5a82 ("mtd: nand: mxc: switch to mtd_ooblayout_ops")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index a764d5c..5bedf7b 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; |
