target/linux/generic/patches-3.19/431-mtd-bcm47xxpart-support-TRX-data-partition-being-UBI.patch

   1 --- a/drivers/mtd/bcm47xxpart.c
   2 +++ b/drivers/mtd/bcm47xxpart.c
   3 @@ -40,6 +40,7 @@
   4  #define ML_MAGIC2                      0x26594131
   5  #define TRX_MAGIC                      0x30524448
   6  #define SQSH_MAGIC                     0x71736873      /* shsq */
   7 +#define UBI_EC_MAGIC                   0x23494255      /* UBI# */
   8
   9  struct trx_header {
  10         uint32_t magic;
  11 @@ -50,7 +51,7 @@ struct trx_header {
  12         uint32_t offset[3];
  13  } __packed;
  14
  15 -static void bcm47xxpart_add_part(struct mtd_partition *part, char *name,
  16 +static void bcm47xxpart_add_part(struct mtd_partition *part, const char *name,
  17                                  u64 offset, uint32_t mask_flags)
  18  {
  19         part->name = name;
  20 @@ -58,6 +59,26 @@ static void bcm47xxpart_add_part(struct
  21         part->mask_flags = mask_flags;
  22  }
  23
  24 +static const char *bcm47xxpart_trx_data_part_name(struct mtd_info *master,
  25 +                                                 size_t offset)
  26 +{
  27 +       uint32_t buf;
  28 +       size_t bytes_read;
  29 +
  30 +       if (mtd_read(master, offset, sizeof(&buf), &bytes_read,
  31 +                    (uint8_t *)&buf) < 0) {
  32 +               pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
  33 +                       offset);
  34 +               goto out_default;
  35 +       }
  36 +
  37 +       if (buf == UBI_EC_MAGIC)
  38 +               return "ubi";
  39 +
  40 +out_default:
  41 +       return "rootfs";
  42 +}
  43 +
  44  static int bcm47xxpart_parse(struct mtd_info *master,
  45                              struct mtd_partition **pparts,
  46                              struct mtd_part_parser_data *data)
  47 @@ -151,6 +172,8 @@ static int bcm47xxpart_parse(struct mtd_
  48
  49                 /* TRX */
  50                 if (buf[0x000 / 4] == TRX_MAGIC) {
  51 +                       const char *name;
  52 +
  53                         if (BCM47XXPART_MAX_PARTS - curr_part < 4) {
  54                                 pr_warn("Not enough partitions left to register trx, scanning stopped!\n");
  55                                 break;
  56 @@ -186,8 +209,9 @@ static int bcm47xxpart_parse(struct mtd_
  57                          * we want to have jffs2 (overlay) in the same mtd.
  58                          */
  59                         if (trx->offset[i]) {
  60 +                               name = bcm47xxpart_trx_data_part_name(master, offset + trx->offset[i]);
  61                                 bcm47xxpart_add_part(&parts[curr_part++],
  62 -                                                    "rootfs",
  63 +                                                    name,
  64                                                      offset + trx->offset[i],
  65                                                      0);
  66                                 i++;