target/linux/goldfish/patches-2.6.30/1000-nand_driver_fixes.patch

   1 --- a/drivers/mtd/devices/goldfish_nand.c
   2 +++ b/drivers/mtd/devices/goldfish_nand.c
   3 @@ -65,7 +65,7 @@ static int goldfish_nand_erase(struct mt
   4         if(rem)
   5                 goto invalid_arg;
   6         ofs *= (mtd->writesize + mtd->oobsize);
   7 -
   8 +
   9         if(len % mtd->writesize)
  10                 goto invalid_arg;
  11         len = len / mtd->writesize * (mtd->writesize + mtd->oobsize);
  12 @@ -94,15 +94,12 @@ static int goldfish_nand_read_oob(struct
  13
  14         if(ofs + ops->len > mtd->size)
  15                 goto invalid_arg;
  16 -       if(ops->datbuf && ops->len && ops->len != mtd->writesize)
  17 -               goto invalid_arg;
  18         if(ops->ooblen + ops->ooboffs > mtd->oobsize)
  19                 goto invalid_arg;
  20
  21         rem = do_div(ofs, mtd->writesize);
  22 -       if(rem)
  23 -               goto invalid_arg;
  24         ofs *= (mtd->writesize + mtd->oobsize);
  25 +       ofs += rem;
  26
  27         if(ops->datbuf)
  28                 ops->retlen = goldfish_nand_cmd(mtd, NAND_CMD_READ, ofs,
  29 @@ -131,7 +128,7 @@ static int goldfish_nand_write_oob(struc
  30                 goto invalid_arg;
  31         if(ops->ooblen + ops->ooboffs > mtd->oobsize)
  32                 goto invalid_arg;
  33 -
  34 +
  35         rem = do_div(ofs, mtd->writesize);
  36         if(rem)
  37                 goto invalid_arg;
  38 @@ -160,15 +157,24 @@ static int goldfish_nand_read(struct mtd
  39
  40         if(from + len > mtd->size)
  41                 goto invalid_arg;
  42 -       if(len != mtd->writesize)
  43 -               goto invalid_arg;
  44 +
  45 +       *retlen = 0;
  46
  47         rem = do_div(from, mtd->writesize);
  48 -       if(rem)
  49 -               goto invalid_arg;
  50         from *= (mtd->writesize + mtd->oobsize);
  51 +       from += rem;
  52
  53 -       *retlen = goldfish_nand_cmd(mtd, NAND_CMD_READ, from, len, buf);
  54 +       do {
  55 +               *retlen += goldfish_nand_cmd(mtd, NAND_CMD_READ, from, min(len, mtd->writesize - rem), buf);
  56 +               if (len > mtd->writesize - rem) {
  57 +                       len -= mtd->writesize - rem;
  58 +                       buf += mtd->writesize - rem;
  59 +                       from += mtd->writesize + mtd->oobsize - rem;
  60 +                       rem = 0;
  61 +               } else {
  62 +                       len = 0;
  63 +               }
  64 +       } while (len);
  65         return 0;
  66
  67  invalid_arg:
  68 @@ -184,15 +190,23 @@ static int goldfish_nand_write(struct mt
  69
  70         if(to + len > mtd->size)
  71                 goto invalid_arg;
  72 -       if(len != mtd->writesize)
  73 -               goto invalid_arg;
  74
  75         rem = do_div(to, mtd->writesize);
  76         if(rem)
  77                 goto invalid_arg;
  78         to *= (mtd->writesize + mtd->oobsize);
  79
  80 -       *retlen = goldfish_nand_cmd(mtd, NAND_CMD_WRITE, to, len, (void *)buf);
  81 +       *retlen = 0;
  82 +       do {
  83 +               *retlen += goldfish_nand_cmd(mtd, NAND_CMD_WRITE, to, min(len, mtd->writesize), (void *)buf);
  84 +               if (len > mtd->writesize) {
  85 +                       len -= mtd->writesize;
  86 +                       buf += mtd->writesize;
  87 +                       to += mtd->writesize + mtd->oobsize;
  88 +               } else {
  89 +                       len = 0;
  90 +               }
  91 +       } while (len);
  92         return 0;
  93
  94  invalid_arg: