package/boot/kobs-ng/patches/004-fix-cal_nfc_geometry.patch

   1 The Freescale downstream vendor kernel has a patch that exports the bch
   2 flash geometry via a debugfs file. This is not available in mainline linux
   3 kernels so the fallback method calculates the geometry based on known info
   4 from the mtd partition. A bug exists in this funcion where it fails to
   5 assume that block0 ECC is the same as the other blocks by default.
   6 --- a/src/mtd.c
   7 +++ b/src/mtd.c
   8 @@ -610,7 +610,7 @@ static int cal_nfc_geometry(struct mtd_d
   9         /* The two are fixed, please change them when the driver changes. */
  10         geo->metadata_size_in_bytes = 10;
  11         geo->gf_len = 13;
  12 -       geo->ecc_chunkn_size_in_bytes = 512;
  13 +       geo->ecc_chunkn_size_in_bytes = geo->ecc_chunk0_size_in_bytes = 512;
  14
  15         if (mtd->oobsize > geo->ecc_chunkn_size_in_bytes) {
  16                 geo->gf_len = 14;
  17 @@ -700,8 +700,9 @@ int parse_nfc_geometry(struct mtd_data *
  18         unsigned int       value;
  19
  20         if (!plat_config_data->m_u32UseNfcGeo) {
  21 +               /* fsl kernel patch provides bch_geometry via debugfs */
  22                 if (!(node = fopen(dbg_geometry_node_path, "r"))) {
  23 -                       fprintf(stderr, "Cannot open BCH geometry node: \"%s\"",
  24 +                       fprintf(stderr, "Cannot open BCH geometry node: \"%s\"\n",
  25                                 dbg_geometry_node_path);
  26                         return cal_nfc_geometry(md);
  27                 }