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mtd: nand/fsmc: Initialize the badblockbits to 7

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Ideally, the block should have 0xff written on the bad block position. Any value
other than 0xff implies a bad block. In practical situations, there can be
bit flips in the oob area as well which means that a block with 0x7f being read
at bad block position may imply a bad block but it is infact only a bit flip in
the bad block byte.

To resolve this problem, the block is marked as good if number of high bits is
greater than or equal to badblockbits (initialized to 7)

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Vipin Kumar 2012-03-14 11:47:12 +05:30 committed by David Woodhouse
parent b533f8d84f
commit 467e6e7be2
1 changed files with 1 additions and 0 deletions
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drivers/mtd/nand/fsmc_nand.c
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@ -802,6 +802,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
nand->ecc.size = 512;
nand->options = pdata->options;
nand->select_chip = fsmc_select_chip;
nand->badblockbits = 7;
if (pdata->width == FSMC_NAND_BW16)
nand->options |= NAND_BUSWIDTH_16;