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authorBoris Brezillon <boris.brezillon@free-electrons.com>2016-11-25 11:32:32 +0100
committerBoris Brezillon <boris.brezillon@free-electrons.com>2017-08-23 16:49:21 +0200
commit3bff08dffe3115a25ce04b95ea75f6d868572c60 (patch)
tree04d973768bb3404725ccc0ae8f5ed26bd465ada2
parentfcf59f1ff525bc6400a893e2a0820afcf815f4c3 (diff)
downloadop-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.c7
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;
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