diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0027-omap-nand-fix-subpage-ecc-issue-with-prefetch.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0027-omap-nand-fix-subpage-ecc-issue-with-prefetch.patch | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0027-omap-nand-fix-subpage-ecc-issue-with-prefetch.patch b/extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0027-omap-nand-fix-subpage-ecc-issue-with-prefetch.patch new file mode 100644 index 00000000..21eb1e9f --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0027-omap-nand-fix-subpage-ecc-issue-with-prefetch.patch @@ -0,0 +1,63 @@ +From fb4dfff6a6e107e0e526801e7add4a9aaeab1eab Mon Sep 17 00:00:00 2001 +From: kishore kadiyala <kishore.kadiyala@ti.com> +Date: Mon, 2 May 2011 11:10:38 +0000 +Subject: [PATCH 27/32] omap : nand : fix subpage ecc issue with prefetch + +For prefetch engine, read and write got broken in commit '2c01946c'. +We never hit a scenario of not getting 'gpmc_prefetch_enable' +call success. +When reading/writing a subpage with a non divisible by 4 ecc number +of bytes, the mis-aligned bytes gets handled first before enabling +the Prefetch engine, then it reads/writes rest of the bytes. + +Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com> +Signed-off-by: Vimal Singh <vimal.newwork@gmail.com> +Reported-by: Bryan DE FARIA <bdefaria@adeneo-embedded.com> +--- + drivers/mtd/nand/omap2.c | 12 +++++------- + 1 files changed, 5 insertions(+), 7 deletions(-) + +diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c +index 832f111..471a39b 100644 +--- a/drivers/mtd/nand/omap2.c ++++ b/drivers/mtd/nand/omap2.c +@@ -275,11 +275,10 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len) + if (ret) { + /* PFPW engine is busy, use cpu copy method */ + if (info->nand.options & NAND_BUSWIDTH_16) +- omap_read_buf16(mtd, buf, len); ++ omap_read_buf16(mtd, (u_char *)p, len); + else +- omap_read_buf8(mtd, buf, len); ++ omap_read_buf8(mtd, (u_char *)p, len); + } else { +- p = (u32 *) buf; + do { + r_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT); + r_count = r_count >> 2; +@@ -305,7 +304,7 @@ static void omap_write_buf_pref(struct mtd_info *mtd, + struct omap_nand_info, mtd); + uint32_t w_count = 0; + int i = 0, ret = 0; +- u16 *p; ++ u16 *p = (u16 *)buf; + unsigned long tim, limit; + + /* take care of subpage writes */ +@@ -321,11 +320,10 @@ static void omap_write_buf_pref(struct mtd_info *mtd, + if (ret) { + /* PFPW engine is busy, use cpu copy method */ + if (info->nand.options & NAND_BUSWIDTH_16) +- omap_write_buf16(mtd, buf, len); ++ omap_write_buf16(mtd, (u_char *)p, len); + else +- omap_write_buf8(mtd, buf, len); ++ omap_write_buf8(mtd, (u_char *)p, len); + } else { +- p = (u16 *) buf; + while (len) { + w_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT); + w_count = w_count >> 1; +-- +1.6.6.1 + |