diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.14/0047-mtd-nand-Create-a-BBT-flag-to-access-bad-block-marke.patch')
-rw-r--r-- | target/linux/ipq806x/patches-4.14/0047-mtd-nand-Create-a-BBT-flag-to-access-bad-block-marke.patch | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/target/linux/ipq806x/patches-4.14/0047-mtd-nand-Create-a-BBT-flag-to-access-bad-block-marke.patch b/target/linux/ipq806x/patches-4.14/0047-mtd-nand-Create-a-BBT-flag-to-access-bad-block-marke.patch deleted file mode 100644 index fe98980766..0000000000 --- a/target/linux/ipq806x/patches-4.14/0047-mtd-nand-Create-a-BBT-flag-to-access-bad-block-marke.patch +++ /dev/null @@ -1,72 +0,0 @@ -From c7c6a0f50f9ac3620c611ce06ba1f9fafea0444e Mon Sep 17 00:00:00 2001 -From: Archit Taneja <architt@codeaurora.org> -Date: Mon, 3 Aug 2015 10:38:14 +0530 -Subject: [PATCH 47/69] mtd: nand: Create a BBT flag to access bad block - markers in raw mode - -Some controllers can access the factory bad block marker from OOB only -when they read it in raw mode. When ECC is enabled, these controllers -discard reading/writing bad block markers, preventing access to them -altogether. - -The bbt driver assumes MTD_OPS_PLACE_OOB when scanning for bad blocks. -This results in the nand driver's ecc->read_oob() op to be called, which -works with ECC enabled. - -Create a new BBT option flag that tells nand_bbt to force the mode to -MTD_OPS_RAW. This would result in the correct op being called for the -underlying nand controller driver. - -Reviewed-by: Andy Gross <agross@codeaurora.org> -Signed-off-by: Archit Taneja <architt@codeaurora.org> ---- - drivers/mtd/nand/nand_base.c | 6 +++++- - drivers/mtd/nand/nand_bbt.c | 6 +++++- - include/linux/mtd/bbm.h | 6 ++++++ - 3 files changed, 16 insertions(+), 2 deletions(-) - ---- a/drivers/mtd/nand/nand_base.c -+++ b/drivers/mtd/nand/nand_base.c -@@ -481,7 +481,11 @@ static int nand_default_block_markbad(st - } else { - ops.len = ops.ooblen = 1; - } -- ops.mode = MTD_OPS_PLACE_OOB; -+ -+ if (unlikely(chip->bbt_options & NAND_BBT_ACCESS_BBM_RAW)) -+ ops.mode = MTD_OPS_RAW; -+ else -+ ops.mode = MTD_OPS_PLACE_OOB; - - /* Write to first/last page(s) if necessary */ - if (chip->bbt_options & NAND_BBT_SCANLASTPAGE) ---- a/drivers/mtd/nand/nand_bbt.c -+++ b/drivers/mtd/nand/nand_bbt.c -@@ -420,7 +420,11 @@ static int scan_block_fast(struct mtd_in - ops.oobbuf = buf; - ops.ooboffs = 0; - ops.datbuf = NULL; -- ops.mode = MTD_OPS_PLACE_OOB; -+ -+ if (unlikely(bd->options & NAND_BBT_ACCESS_BBM_RAW)) -+ ops.mode = MTD_OPS_RAW; -+ else -+ ops.mode = MTD_OPS_PLACE_OOB; - - for (j = 0; j < numpages; j++) { - /* ---- a/include/linux/mtd/bbm.h -+++ b/include/linux/mtd/bbm.h -@@ -116,6 +116,12 @@ struct nand_bbt_descr { - #define NAND_BBT_NO_OOB_BBM 0x00080000 - - /* -+ * Force MTD_OPS_RAW mode when trying to access bad block markes from OOB. To -+ * be used by controllers which can access BBM only when ECC is disabled, i.e, -+ * when in RAW access mode -+ */ -+#define NAND_BBT_ACCESS_BBM_RAW 0x00100000 -+/* - * Flag set by nand_create_default_bbt_descr(), marking that the nand_bbt_descr - * was allocated dynamicaly and must be freed in nand_release(). Has no meaning - * in nand_chip.bbt_options. |