1 From a5ba30016f4a29f5875112169a92a28a9ba7f5c9 Mon Sep 17 00:00:00 2001
2 From: Hans de Goede <hdegoede@redhat.com>
3 Date: Mon, 25 May 2015 11:59:03 +0200
4 Subject: [PATCH] mtd: nand: sunxi: Add NAND_BBT_CREATE_EMPTY to bbt_options
6 The ftl format used by the Allwinner Android kernels, with which most
7 Allwinnner devices ship, overrides the factory bad block markers, and
8 fills the oob data with a pattern which causes a lot of false bad block
9 positives, so when we first create a bbt table, start with an empty one
10 to avoid marking a ton of blocks as bad from the start.
12 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
14 drivers/mtd/nand/sunxi_nand.c | 9 +++++++++
15 1 file changed, 9 insertions(+)
17 diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
18 index 74f2caf..72ab770 100644
19 --- a/drivers/mtd/nand/sunxi_nand.c
20 +++ b/drivers/mtd/nand/sunxi_nand.c
21 @@ -1853,6 +1853,15 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
22 if (of_get_nand_on_flash_bbt(np))
23 nand->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
26 + * The ftl format used by the Allwinner Android kernels overrides
27 + * the factory bad block markers, and fills the oob data with a
28 + * pattern which causes a lot of false bad block positives, so
29 + * when we first create a bbt table, start with an empty one
30 + * to avoid marking a ton of blocks as bad from the start.
32 + nand->bbt_options |= NAND_BBT_CREATE_EMPTY;
35 mtd->dev.parent = dev;