target/linux/generic/pending-3.18/040-mtd-bcm47xxpart-backports-from-3.19.patch

   1 --- a/drivers/mtd/bcm47xxpart.c
   2 +++ b/drivers/mtd/bcm47xxpart.c
   3 @@ -15,8 +15,12 @@
   4  #include <linux/mtd/mtd.h>
   5  #include <linux/mtd/partitions.h>
   6
   7 -/* 10 parts were found on sflash on Netgear WNDR4500 */
   8 -#define BCM47XXPART_MAX_PARTS          12
   9 +/*
  10 + * NAND flash on Netgear R6250 was verified to contain 15 partitions.
  11 + * This will result in allocating too big array for some old devices, but the
  12 + * memory will be freed soon anyway (see mtd_device_parse_register).
  13 + */
  14 +#define BCM47XXPART_MAX_PARTS          20
  15
  16  /*
  17   * Amount of bytes we read when analyzing each block of flash memory.
  18 @@ -168,18 +172,26 @@ static int bcm47xxpart_parse(struct mtd_
  19                                 i++;
  20                         }
  21
  22 -                       bcm47xxpart_add_part(&parts[curr_part++], "linux",
  23 -                                            offset + trx->offset[i], 0);
  24 -                       i++;
  25 +                       if (trx->offset[i]) {
  26 +                               bcm47xxpart_add_part(&parts[curr_part++],
  27 +                                                    "linux",
  28 +                                                    offset + trx->offset[i],
  29 +                                                    0);
  30 +                               i++;
  31 +                       }
  32
  33                         /*
  34                          * Pure rootfs size is known and can be calculated as:
  35                          * trx->length - trx->offset[i]. We don't fill it as
  36                          * we want to have jffs2 (overlay) in the same mtd.
  37                          */
  38 -                       bcm47xxpart_add_part(&parts[curr_part++], "rootfs",
  39 -                                            offset + trx->offset[i], 0);
  40 -                       i++;
  41 +                       if (trx->offset[i]) {
  42 +                               bcm47xxpart_add_part(&parts[curr_part++],
  43 +                                                    "rootfs",
  44 +                                                    offset + trx->offset[i],
  45 +                                                    0);
  46 +                               i++;
  47 +                       }
  48
  49                         last_trx_part = curr_part - 1;
  50