recipes/linux/linux-omap-psp-2.6.32/0009-MTD-NAND-omap2-proper-fix-for-subpage-read-ECC-error.patch

   1 From 64e4fc11b960da97728e0d87dcf4c1e98f808501 Mon Sep 17 00:00:00 2001
   2 From: Steve Sakoman <steve@sakoman.com>
   3 Date: Thu, 31 Dec 2009 07:05:02 -0800
   4 Subject: [PATCH] MTD: NAND: omap2: proper fix for subpage read ECC errors
   5
   6 ---
   7  drivers/mtd/nand/omap2.c |   11 +++++++----
   8  1 files changed, 7 insertions(+), 4 deletions(-)
   9
  10 diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
  11 index 1bb799f..75004fe 100644
  12 --- a/drivers/mtd/nand/omap2.c
  13 +++ b/drivers/mtd/nand/omap2.c
  14 @@ -295,11 +295,14 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
  15         u32 *p = (u32 *)buf;
  16
  17         /* take care of subpage reads */
  18 -       for (; len % 4 != 0; ) {
  19 -               *buf++ = __raw_readb(info->nand.IO_ADDR_R);
  20 -               len--;
  21 +       if (len % 4) {
  22 +               if (info->nand.options & NAND_BUSWIDTH_16)
  23 +                       omap_read_buf16(mtd, buf, len % 4);
  24 +               else
  25 +                       omap_read_buf8(mtd, buf, len % 4);
  26 +               p = (u32 *) (buf + len % 4);
  27 +               len -= len % 4;
  28         }
  29 -       p = (u32 *) buf;
  30
  31         /* configure and start prefetch transfer */
  32         ret = gpmc_prefetch_enable(info->gpmc_cs, 0x0, len, 0x0);
  33 --
  34 1.6.5
  35