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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2009-09-05 01:20:44 +0900 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-09-19 14:20:33 -0700 |
| commit | 0f777fb9318739baf517c4f4ef66347d8898643d (patch) | |
| tree | cba8a2f7e78d364561e23e21c93c7f287a87fab3 | |
| parent | be2f092bfc4f6a415bb4c3e2dcbf521a1f2a0fe5 (diff) | |
| download | linux-0f777fb9318739baf517c4f4ef66347d8898643d.tar.gz linux-0f777fb9318739baf517c4f4ef66347d8898643d.tar.bz2 linux-0f777fb9318739baf517c4f4ef66347d8898643d.zip | |
mtd: nand: fix tmio_nand ecc correction
This driver may be reading 512 bytes at a times, but still calculates
256-byte sector ECC. So the nand_correct_data() is not appropriate
for this driver. Implement its ecc.correct function calling
__nand_correct_data() twice.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Vimal Singh <vimalsingh@ti.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/mtd/nand/tmio_nand.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mtd/nand/tmio_nand.c b/drivers/mtd/nand/tmio_nand.c index daa6a4c3b8ce..92c73344a669 100644 --- a/drivers/mtd/nand/tmio_nand.c +++ b/drivers/mtd/nand/tmio_nand.c @@ -301,6 +301,21 @@ static int tmio_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, return 0; } +static int tmio_nand_correct_data(struct mtd_info *mtd, unsigned char *buf, + unsigned char *read_ecc, unsigned char *calc_ecc) +{ + int r0, r1; + + /* assume ecc.size = 512 and ecc.bytes = 6 */ + r0 = __nand_correct_data(buf, read_ecc, calc_ecc, 256); + if (r0 < 0) + return r0; + r1 = __nand_correct_data(buf + 256, read_ecc + 3, calc_ecc + 3, 256); + if (r1 < 0) + return r1; + return r0 + r1; +} + static int tmio_hw_init(struct platform_device *dev, struct tmio_nand *tmio) { struct mfd_cell *cell = (struct mfd_cell *)dev->dev.platform_data; @@ -424,7 +439,7 @@ static int tmio_probe(struct platform_device *dev) nand_chip->ecc.bytes = 6; nand_chip->ecc.hwctl = tmio_nand_enable_hwecc; nand_chip->ecc.calculate = tmio_nand_calculate_ecc; - nand_chip->ecc.correct = nand_correct_data; + nand_chip->ecc.correct = tmio_nand_correct_data; if (data) nand_chip->badblock_pattern = data->badblock_pattern; |