diff options
| author | Mike Dunn <mikedunn@newsguy.com> | 2012-04-25 21:06:06 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-05-14 06:10:28 +0200 |
| commit | 44df4d11b8f573e9efcba94d63e6a1ad148c76d0 (patch) | |
| tree | 6713b355ae651799df014eeeae864ca82bdf8963 /drivers/mtd | |
| parent | mtd: ecc_strength is at ecc step granularity (diff) | |
| download | linux-44df4d11b8f573e9efcba94d63e6a1ad148c76d0.tar.xz linux-44df4d11b8f573e9efcba94d63e6a1ad148c76d0.zip | |
mtd: nand: fix incorrect ecc strength values
This fixes a couple of ecc strength values for which I earlier made conservative
guesses, but whose correct values were later determined¹ (thanks Ivan). Also
sets strength for fsl_ifc_nand, which was merged to mainline after the original
patch that set the strength for all drivers.
¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040325.html
Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/bcm_umi_nand.c | 7 | ||||
| -rw-r--r-- | drivers/mtd/nand/fsl_ifc_nand.c | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/jz4740_nand.c | 6 |
3 files changed, 3 insertions, 11 deletions
diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c index 6908cdde3065..7134adfa1089 100644 --- a/drivers/mtd/nand/bcm_umi_nand.c +++ b/drivers/mtd/nand/bcm_umi_nand.c @@ -476,12 +476,7 @@ static int __devinit bcm_umi_nand_probe(struct platform_device *pdev) this->badblock_pattern = &largepage_bbt; } - /* - * FIXME: ecc strength value of 6 bits per 512 bytes of data is a - * conservative guess, given 13 ecc bytes and using bch alg. - * (Assume Galois field order m=15 to allow a margin of error.) - */ - this->ecc.strength = 6; + this->ecc.strength = 8; #endif diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index 5387cec53c9a..872cc9605291 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -821,6 +821,7 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv) /* Hardware generates ECC per 512 Bytes */ chip->ecc.size = 512; chip->ecc.bytes = 8; + chip->ecc.strength = 4; switch (csor & CSOR_NAND_PGS_MASK) { case CSOR_NAND_PGS_512: diff --git a/drivers/mtd/nand/jz4740_nand.c b/drivers/mtd/nand/jz4740_nand.c index e4147e8acb7c..a6fa884ae49b 100644 --- a/drivers/mtd/nand/jz4740_nand.c +++ b/drivers/mtd/nand/jz4740_nand.c @@ -332,11 +332,7 @@ static int __devinit jz_nand_probe(struct platform_device *pdev) chip->ecc.mode = NAND_ECC_HW_OOB_FIRST; chip->ecc.size = 512; chip->ecc.bytes = 9; - chip->ecc.strength = 2; - /* - * FIXME: ecc_strength value of 2 bits per 512 bytes of data is a - * conservative guess, given 9 ecc bytes and reed-solomon alg. - */ + chip->ecc.strength = 4; if (pdata) chip->ecc.layout = pdata->ecc_layout; |