diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch b/target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch deleted file mode 100644 index 088b8cb..0000000 --- a/target/linux/ipq806x/patches-4.1/161-mtd-nand-Create-a-BBT-flag-to-access-bad-block-markers-in-raw-mode.patch +++ /dev/null @@ -1,84 +0,0 @@ -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: [v3, - 1/5] mtd: nand: Create a BBT flag to access bad block markers in raw - mode -From: Archit Taneja <architt@codeaurora.org> -X-Patchwork-Id: 6927081 -Message-Id: <1438578498-32254-2-git-send-email-architt@codeaurora.org> -To: linux-mtd@lists.infradead.org, dehrenberg@google.com, - cernekee@gmail.com, computersforpeace@gmail.com -Cc: linux-arm-msm@vger.kernel.org, agross@codeaurora.org, - sboyd@codeaurora.org, linux-kernel@vger.kernel.org, - Archit Taneja <architt@codeaurora.org> -Date: Mon, 3 Aug 2015 10:38:14 +0530 - -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 | 7 +++++++ - 3 files changed, 17 insertions(+), 2 deletions(-) - ---- a/drivers/mtd/nand/nand_base.c -+++ b/drivers/mtd/nand/nand_base.c -@@ -395,7 +395,11 @@ 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 -@@ -423,7 +423,11 @@ 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 +116,13 @@ 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. |