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mtd: rawnand: fix return value check for bad block status

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Positive return value from read_oob() is making false BAD
blocks. For some of the NAND controllers, OOB bytes will be
protected with ECC and read_oob() will return number of bitflips.
If there is any bitflip in ECC protected OOB bytes for BAD block
status page, then that block is getting treated as BAD.

Fixes: c120e75e0e ("mtd: nand: use read_oob() instead of cmdfunc() for bad block check")
Cc: <stable@vger.kernel.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Abhishek Sahu 2018-06-13 14:32:36 +05:30 committed by Boris Brezillon
parent 3f77f244d8
commit e9893e6fa9
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/raw/nand_base.c
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@ -440,7 +440,7 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs)
for (; page < page_end; page++) {
res = chip->ecc.read_oob(mtd, chip, page);
if (res)
if (res < 0)
return res;
bad = chip->oob_poi[chip->badblockpos];