diff options
| author | Vipin Kumar <vipin.kumar@st.com> | 2012-03-14 07:17:10 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-03-27 01:58:25 +0200 |
| commit | aea686b47c0cf97e0c6941799b523b6df87fc234 (patch) | |
| tree | 63df7ffd72eff18739993709768ea86b039e1dbe /drivers | |
| parent | mtd: nand/fsmc: Correct the multiline comment format (diff) | |
| download | linux-aea686b47c0cf97e0c6941799b523b6df87fc234.tar.xz linux-aea686b47c0cf97e0c6941799b523b6df87fc234.zip | |
mtd: nand/fsmc: Read only 512 + 13 bytes for 8bit NAND devices
The ECC logic of FSMC works on 512 bytes data + 13 bytes ECC to generate error
indices of up to 8 incorrect bits. The FSMC driver reads 14 instead of 13 oob
bytes to accommodate for 16 bit device as well.
Unfortunately, the internal ecc state machine gets corrupted for 8 bit devices
reading 512 + 14 bytes of data resulting in error indices not getting reported.
Fix this by reading 14 bytes only for 16 bit devices
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/fsmc_nand.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c index 902ba0d9c32d..bd423390d330 100644 --- a/drivers/mtd/nand/fsmc_nand.c +++ b/drivers/mtd/nand/fsmc_nand.c @@ -549,7 +549,9 @@ static int fsmc_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, * to read at least 13 bytes even in case of 16 bit NAND * devices */ - len = roundup(len, 2); + if (chip->options & NAND_BUSWIDTH_16) + len = roundup(len, 2); + chip->cmdfunc(mtd, NAND_CMD_READOOB, off, page); chip->read_buf(mtd, oob + j, len); j += len; |