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From a5ba30016f4a29f5875112169a92a28a9ba7f5c9 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
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 <hdegoede@redhat.com>
---
drivers/mtd/nand/sunxi_nand.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index 74f2caf..72ab770 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -1853,6 +1853,15 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
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;
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