diff options
| author | Brian Norris <computersforpeace@gmail.com> | 2012-01-13 18:11:48 -0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-03-27 00:11:50 +0100 |
| commit | cdbec0508699e3346052bf098c5c330a711a86a9 (patch) | |
| tree | fa354f87911bf1929c7c04925900c8523eb6722f | |
| parent | 009184296d957d864d6fa9ac2dd192d29e069878 (diff) | |
| download | linux-stable-cdbec0508699e3346052bf098c5c330a711a86a9.tar.gz linux-stable-cdbec0508699e3346052bf098c5c330a711a86a9.tar.bz2 linux-stable-cdbec0508699e3346052bf098c5c330a711a86a9.zip | |
mtd: nand: fix SCAN2NDPAGE check for BBM
nand_block_bad() doesn't check the correct pages when
NAND_BBT_SCAN2NDPAGE is enabled. It should scan both the OOB region of
both the 1st and 2nd page of each block.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index cd827d5a8255..7855fd2d5c60 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -338,7 +338,7 @@ static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) */ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) { - int page, chipnr, res = 0; + int page, chipnr, res = 0, i = 0; struct nand_chip *chip = mtd->priv; u16 bad; @@ -356,23 +356,29 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) chip->select_chip(mtd, chipnr); } - if (chip->options & NAND_BUSWIDTH_16) { - chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE, - page); - bad = cpu_to_le16(chip->read_word(mtd)); - if (chip->badblockpos & 0x1) - bad >>= 8; - else - bad &= 0xFF; - } else { - chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page); - bad = chip->read_byte(mtd); - } + do { + if (chip->options & NAND_BUSWIDTH_16) { + chip->cmdfunc(mtd, NAND_CMD_READOOB, + chip->badblockpos & 0xFE, page); + bad = cpu_to_le16(chip->read_word(mtd)); + if (chip->badblockpos & 0x1) + bad >>= 8; + else + bad &= 0xFF; + } else { + chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, + page); + bad = chip->read_byte(mtd); + } - if (likely(chip->badblockbits == 8)) - res = bad != 0xFF; - else - res = hweight8(bad) < chip->badblockbits; + if (likely(chip->badblockbits == 8)) + res = bad != 0xFF; + else + res = hweight8(bad) < chip->badblockbits; + ofs += mtd->writesize; + page = (int)(ofs >> chip->page_shift) & chip->pagemask; + i++; + } while (!res && i < 2 && (chip->bbt_options & NAND_BBT_SCAN2NDPAGE)); if (getchip) nand_release_device(mtd); |