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mtd: nand: Fix probe of Samsung NAND chips

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Apparently, the check for a 6-byte ID string introduced by commit
426c457a32 ("mtd: nand: extend NAND flash
detection to new MLC chips") is NOT sufficient to determine whether or
not a Samsung chip uses their new MLC detection scheme or the old,
standard scheme. This adds a condition to check cell type.

Signed-off-by: Tilman Sauerbeck <tilman@code-monkey.de>
Signed-off-by: Brian Norris <norris@broadcom.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
This commit is contained in:
Tilman Sauerbeck 2010-08-20 14:01:47 -07:00 committed by David Woodhouse
parent 065a1ed8de
commit cfe3fdadb1
1 changed files with 1 additions and 0 deletions
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1
drivers/mtd/nand/nand_base.c
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@ -2866,6 +2866,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
*/ */
if (id_data[0] == id_data[6] && id_data[1] == id_data[7] && if (id_data[0] == id_data[6] && id_data[1] == id_data[7] &&
id_data[0] == NAND_MFR_SAMSUNG && id_data[0] == NAND_MFR_SAMSUNG &&
(chip->cellinfo & NAND_CI_CELLTYPE_MSK) &&
id_data[5] != 0x00) { id_data[5] != 0x00) {
/* Calc pagesize */ /* Calc pagesize */
mtd->writesize = 2048 << (extid & 0x03); mtd->writesize = 2048 << (extid & 0x03);