mtd: flash drivers set ecc strength

Flash device drivers initialize 'ecc_strength' in struct mtd_info, which is the
maximum number of bit errors that can be corrected in one writesize region.

Drivers using the nand interface intitialize 'strength' in struct nand_ecc_ctrl,
which is the maximum number of bit errors that can be corrected in one ecc step.
Nand infrastructure code translates this to 'ecc_strength'.

Also for nand drivers, the nand infrastructure code sets ecc.strength for ecc
modes NAND_ECC_SOFT, NAND_ECC_SOFT_BCH, and NAND_ECC_NONE.  It is set in the
driver for all other modes.

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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 3984d488f9ab..a9e57d686297 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -1590,6 +1590,7 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
                         ECC_15BITS * (denali->mtd.writesize /
                         ECC_SECTOR_SIZE)))) {
                 /* if MLC OOB size is large enough, use 15bit ECC*/
+                denali->nand.ecc.strength = 15;
                 denali->nand.ecc.layout = &nand_15bit_oob;
                 denali->nand.ecc.bytes = ECC_15BITS;
                 iowrite32(15, denali->flash_reg + ECC_CORRECTION);
@@ -1600,12 +1601,14 @@ static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
                                 " contain 8bit ECC correction codes");
                 goto failed_req_irq;
         } else {
+                denali->nand.ecc.strength = 8;
                 denali->nand.ecc.layout = &nand_8bit_oob;
                 denali->nand.ecc.bytes = ECC_8BITS;
                 iowrite32(8, denali->flash_reg + ECC_CORRECTION);
         }
 
         denali->nand.ecc.bytes *= denali->devnum;
+        denali->nand.ecc.strength *= denali->devnum;
         denali->nand.ecc.layout->eccbytes *=
                 denali->mtd.writesize / ECC_SECTOR_SIZE;
         denali->nand.ecc.layout->oobfree[0].offset =