target/linux/generic/patches-3.18/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch

   1 --- a/drivers/mtd/mtdpart.c
   2 +++ b/drivers/mtd/mtdpart.c
   3 @@ -641,6 +641,37 @@ int mtd_del_partition(struct mtd_info *m
   4  }
   5  EXPORT_SYMBOL_GPL(mtd_del_partition);
   6
   7 +static int
   8 +run_parsers_by_type(struct mtd_part *slave, enum mtd_parser_type type)
   9 +{
  10 +       struct mtd_partition *parts;
  11 +       int nr_parts;
  12 +       int i;
  13 +
  14 +       nr_parts = parse_mtd_partitions_by_type(&slave->mtd, type, &parts,
  15 +                                               NULL);
  16 +       if (nr_parts <= 0)
  17 +               return nr_parts;
  18 +
  19 +       if (WARN_ON(!parts))
  20 +               return 0;
  21 +
  22 +       for (i = 0; i < nr_parts; i++) {
  23 +               /* adjust partition offsets */
  24 +               parts[i].offset += slave->offset;
  25 +
  26 +               __mtd_add_partition(slave->master,
  27 +                                   parts[i].name,
  28 +                                   parts[i].offset,
  29 +                                   parts[i].size,
  30 +                                   false);
  31 +       }
  32 +
  33 +       kfree(parts);
  34 +
  35 +       return nr_parts;
  36 +}
  37 +
  38  static inline unsigned long
  39  mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
  40  {
  41 @@ -686,6 +717,12 @@ static void split_uimage(struct mtd_info
  42
  43  static void split_firmware(struct mtd_info *master, struct mtd_part *part)
  44  {
  45 +       int ret;
  46 +
  47 +       ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
  48 +       if (ret > 0)
  49 +               return;
  50 +
  51         if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
  52                 split_uimage(master, part);
  53  }
  54 @@ -702,6 +739,12 @@ static void mtd_partition_split(struct m
  55         if (rootfs_found)
  56                 return;
  57
  58 +       if (!strcmp(part->mtd.name, "rootfs")) {
  59 +               run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
  60 +
  61 +               rootfs_found = 1;
  62 +       }
  63 +
  64         if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
  65             config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
  66                 split_firmware(master, part);
  67 --- a/include/linux/mtd/partitions.h
  68 +++ b/include/linux/mtd/partitions.h
  69 @@ -70,6 +70,8 @@ struct mtd_part_parser_data {
  70
  71  enum mtd_parser_type {
  72         MTD_PARSER_TYPE_DEVICE = 0,
  73 +       MTD_PARSER_TYPE_ROOTFS,
  74 +       MTD_PARSER_TYPE_FIRMWARE,
  75  };
  76
  77  struct mtd_part_parser {