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| author | Ralf Rösch <ralf.roesch@rw-gmbh.de> | 2010-12-30 10:30:11 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2011-01-06 15:29:12 +0000 |
| commit | 24ac9a94f9e21ea71d877b0c80867d625b68bec2 (patch) | |
| tree | 425ee70445e5c8e43c04b927249b414c99f6fb50 /drivers | |
| parent | e8953b7395089b917f30d0909f845664d5fafa4e (diff) | |
| download | linux-24ac9a94f9e21ea71d877b0c80867d625b68bec2.tar.gz linux-24ac9a94f9e21ea71d877b0c80867d625b68bec2.tar.bz2 linux-24ac9a94f9e21ea71d877b0c80867d625b68bec2.zip | |
mtd: txx9ndfmc: limit transfer bytes to 512 (ECC provides 6 bytes max)
See commit: c0cbfd0e81d879a950ba6f0df3f75ea30c5ab16e
Using __nand_correct_data() helper function, this driver can read 512
byte (with 6 byte ECC) at a time.
This is correct, but not more:
With NAND chips providing page sizes > 512 Bytes
chip->ecc.bytes are calculated > 6 in txx9ndfmc_nand_scan.
According the data sheet there are (only) 6 bytes ECC available.
After applying the patch a Hynix 512M*8 with 2KiB page size could be
successfully formatted and used with an ubifs file system.
Signed-off-by: Ralf Roesch <ralf.roesch@rw-gmbh.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/txx9ndfmc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/mtd/nand/txx9ndfmc.c b/drivers/mtd/nand/txx9ndfmc.c index 054a41c0ef4a..ca270a4881a4 100644 --- a/drivers/mtd/nand/txx9ndfmc.c +++ b/drivers/mtd/nand/txx9ndfmc.c @@ -277,8 +277,9 @@ static int txx9ndfmc_nand_scan(struct mtd_info *mtd) ret = nand_scan_ident(mtd, 1, NULL); if (!ret) { if (mtd->writesize >= 512) { - chip->ecc.size = mtd->writesize; - chip->ecc.bytes = 3 * (mtd->writesize / 256); + /* Hardware ECC 6 byte ECC per 512 Byte data */ + chip->ecc.size = 512; + chip->ecc.bytes = 6; } ret = nand_scan_tail(mtd); } |