From a5ba30016f4a29f5875112169a92a28a9ba7f5c9 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Mon, 25 May 2015 11:59:03 +0200 Subject: [PATCH] mtd: nand: sunxi: Add NAND_BBT_CREATE_EMPTY to bbt_options The ftl format used by the Allwinner Android kernels, with which most Allwinnner devices ship, overrides the factory bad block markers, and fills the oob data with a pattern which causes a lot of false bad block positives, so when we first create a bbt table, start with an empty one to avoid marking a ton of blocks as bad from the start. Signed-off-by: Hans de Goede --- drivers/mtd/nand/sunxi_nand.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/mtd/nand/sunxi_nand.c +++ b/drivers/mtd/nand/sunxi_nand.c @@ -1851,6 +1851,15 @@ static int sunxi_nand_chip_init(struct d if (of_get_nand_on_flash_bbt(np)) nand->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB; + /* + * The ftl format used by the Allwinner Android kernels overrides + * the factory bad block markers, and fills the oob data with a + * pattern which causes a lot of false bad block positives, so + * when we first create a bbt table, start with an empty one + * to avoid marking a ton of blocks as bad from the start. + */ + nand->bbt_options |= NAND_BBT_CREATE_EMPTY; + mtd = &chip->mtd; mtd->dev.parent = dev; mtd->priv = nand;