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| author | Brian Norris <computersforpeace@gmail.com> | 2013-12-03 11:04:14 -0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-01-13 23:12:38 -0800 |
| commit | b72f3dfb8ccf7e39b9434f548c1c98aa45c11426 (patch) | |
| tree | 2bb9eac3b7ee473d9e90647734e7670130fd67eb /drivers/mtd/nand/nand_base.c | |
| parent | 1963ff97ca461fed4d9212e7e7b9c29715251342 (diff) | |
| download | talos-obmc-linux-b72f3dfb8ccf7e39b9434f548c1c98aa45c11426.tar.gz talos-obmc-linux-b72f3dfb8ccf7e39b9434f548c1c98aa45c11426.zip | |
mtd: nand: localize ECC failures per page
ECC failures can be tracked at the page level, not the do_read_ops level
(i.e., a potentially multi-page transaction).
This helps prepare for READ RETRY support.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Huang Shijie <b32955@freescale.com>
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 404e83d7e3da..b5c3768b32ae 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1422,7 +1422,6 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, { int chipnr, page, realpage, col, bytes, aligned, oob_required; struct nand_chip *chip = mtd->priv; - struct mtd_ecc_stats stats; int ret = 0; uint32_t readlen = ops->len; uint32_t oobreadlen = ops->ooblen; @@ -1431,8 +1430,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, uint8_t *bufpoi, *oob, *buf; unsigned int max_bitflips = 0; - - stats = mtd->ecc_stats; + bool ecc_fail = false; chipnr = (int)(from >> chip->chip_shift); chip->select_chip(mtd, chipnr); @@ -1447,6 +1445,8 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, oob_required = oob ? 1 : 0; while (1) { + unsigned int ecc_failures = mtd->ecc_stats.failed; + bytes = min(mtd->writesize - col, readlen); aligned = (bytes == mtd->writesize); @@ -1483,7 +1483,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, /* Transfer not aligned data */ if (!aligned) { if (!NAND_HAS_SUBPAGE_READ(chip) && !oob && - !(mtd->ecc_stats.failed - stats.failed) && + !(mtd->ecc_stats.failed - ecc_failures) && (ops->mode != MTD_OPS_RAW)) { chip->pagebuf = realpage; chip->pagebuf_bitflips = ret; @@ -1513,6 +1513,9 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, else nand_wait_ready(mtd); } + + if (mtd->ecc_stats.failed - ecc_failures) + ecc_fail = true; } else { memcpy(buf, chip->buffers->databuf + col, bytes); buf += bytes; @@ -1547,7 +1550,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, if (ret < 0) return ret; - if (mtd->ecc_stats.failed - stats.failed) + if (ecc_fail) return -EBADMSG; return max_bitflips; |
