openwrtv3/target/linux/sunxi/patches-4.1/125-mtd-nand-sunxi-extend-bbt_options.patch
Jonas Gorski 6be2305da8 kernel: update 4.1 to 4.1.5
Changelog:
 * https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.5

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 46598
2015-08-14 13:06:33 +00:00

34 lines
1.4 KiB
Diff

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(+)
--- 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 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;