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mtd: nand: read_page() returns max_bitflips

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The ecc.read_page() method for nand drivers is changed to return the maximum
number of bitflips that were corrected on any one region covering an ecc step,
This patch doesn't change what the nand code returns to mtd.

This v2 includes the change to the fsl_ifc_nand driver requested by Scott¹.

¹ http://lists.infradead.org/pipermail/linux-mtd/2012-April/040883.html

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Acked-by (freescale changes): Scott Wood <scottwood@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Mike Dunn
2012-04-25 12:06:09 -07:00
committed by David Woodhouse
parent d062d4ede8
commit 3f91e94f7f
10 changed files with 82 additions and 38 deletions
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5
drivers/mtd/nand/docg4.c
View File

@@ -720,6 +720,7 @@ static int read_page(struct mtd_info *mtd, struct nand_chip *nand,
struct docg4_priv *doc = nand->priv;
void __iomem *docptr = doc->virtadr;
uint16_t status, edc_err, *buf16;
int bits_corrected = 0;
dev_dbg(doc->dev, "%s: page %08x\n", __func__, page);
@@ -772,7 +773,7 @@ static int read_page(struct mtd_info *mtd, struct nand_chip *nand,
/* If bitflips are reported, attempt to correct with ecc */
if (edc_err & DOC_ECCCONF1_BCH_SYNDROM_ERR) {
int bits_corrected = correct_data(mtd, buf, page);
bits_corrected = correct_data(mtd, buf, page);
if (bits_corrected == -EBADMSG)
mtd->ecc_stats.failed++;
else
@@ -781,7 +782,7 @@ static int read_page(struct mtd_info *mtd, struct nand_chip *nand,
}
writew(0, docptr + DOC_DATAEND);
return 0;
return bits_corrected;
}