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