target/linux/generic/patches-3.12/404-mtd-use-mtd_get_squashfs_len-in-split_squasfh.patch

   1 --- a/drivers/mtd/mtdpart.c
   2 +++ b/drivers/mtd/mtdpart.c
   3 @@ -33,6 +33,7 @@
   4  #include <linux/err.h>
   5
   6  #include "mtdcore.h"
   7 +#include "mtdsplit.h"
   8
   9  /* Our partition linked list */
  10  static LIST_HEAD(mtd_partitions);
  11 @@ -669,43 +670,16 @@ mtd_pad_erasesize(struct mtd_info *mtd,
  12         return len;
  13  }
  14
  15 -#define ROOTFS_SPLIT_NAME "rootfs_data"
  16 -
  17 -struct squashfs_super_block {
  18 -       __le32 s_magic;
  19 -       __le32 pad0[9];
  20 -       __le64 bytes_used;
  21 -};
  22 -
  23 -
  24  static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
  25  {
  26 -       struct squashfs_super_block sb;
  27 +       size_t squashfs_len;
  28         int len, ret;
  29
  30 -       ret = mtd_read(master, offset, sizeof(sb), &len, (void *) &sb);
  31 -       if (ret || (len != sizeof(sb))) {
  32 -               printk(KERN_ALERT "split_squashfs: error occured while reading "
  33 -                       "from \"%s\"\n", master->name);
  34 -               return -EINVAL;
  35 -       }
  36 -
  37 -       if (SQUASHFS_MAGIC != le32_to_cpu(sb.s_magic) ) {
  38 -               printk(KERN_ALERT "split_squashfs: no squashfs found in \"%s\"\n",
  39 -                       master->name);
  40 -               *split_offset = 0;
  41 -               return 0;
  42 -       }
  43 -
  44 -       if (le64_to_cpu((sb.bytes_used)) <= 0) {
  45 -               printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
  46 -                       master->name);
  47 -               *split_offset = 0;
  48 -               return 0;
  49 -       }
  50 +       ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
  51 +       if (ret)
  52 +               return ret;
  53
  54 -       len = (u32) le64_to_cpu(sb.bytes_used);
  55 -       len = mtd_pad_erasesize(master, offset, len);
  56 +       len = mtd_pad_erasesize(master, offset, squashfs_len);
  57         *split_offset = offset + len;
  58
  59         return 0;
  60 --- a/drivers/mtd/Kconfig
  61 +++ b/drivers/mtd/Kconfig
  62 @@ -20,6 +20,7 @@ config MTD_ROOTFS_ROOT_DEV
  63
  64  config MTD_ROOTFS_SPLIT
  65         bool "Automatically split 'rootfs' partition for squashfs"
  66 +       select MTD_SPLIT
  67         default y
  68
  69  config MTD_SPLIT_FIRMWARE