Commit b72f3dfb authored by Brian Norris's avatar Brian Norris

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: default avatarBrian Norris <computersforpeace@gmail.com>
Acked-by: default avatarHuang Shijie <b32955@freescale.com>
parent 1963ff97
......@@ -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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment