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mtd: onenand: bugfix for 2x mode bad block handling 

This bug becomes visible in 2x mode when chip->writesize
is different from mtd->writesize (= 2 * chip->writesize).
At this case the bad block information is read from
the first and the third physical pages instead of
the first and the second as specification states.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Roman Tereshonkov 2010-12-02 15:28:38 +02:00 committed by David Woodhouse
parent 8a8f632d85
commit 01039e4e63
1 changed files with 4 additions and 2 deletions
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6
drivers/mtd/onenand/onenand_bbt.c
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@ -91,13 +91,15 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
for (j = 0; j < len; j++) {
/* No need to read pages fully,
* just read required OOB bytes */
ret = onenand_bbt_read_oob(mtd, from + j * mtd->writesize + bd->offs, &ops);
ret = onenand_bbt_read_oob(mtd,
from + j * this->writesize + bd->offs, &ops);
/* If it is a initial bad block, just ignore it */
if (ret == ONENAND_BBT_READ_FATAL_ERROR)
return -EIO;
if (ret || check_short_pattern(&buf[j * scanlen], scanlen, mtd->writesize, bd)) {
if (ret || check_short_pattern(&buf[j * scanlen],
scanlen, this->writesize, bd)) {
bbm->bbt[i >> 3] |= 0x03 << (i & 0x6);
printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
i >> 1, (unsigned int) from);