target/linux/bcm53xx/patches-3.14/402-mtd-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch

   1 --- a/drivers/mtd/spi-nor/spi-nor.c
   2 +++ b/drivers/mtd/spi-nor/spi-nor.c
   3 @@ -925,29 +925,23 @@ int spi_nor_scan(struct spi_nor *nor, co
   4         if (ret)
   5                 return ret;
   6
   7 -       info = (void *)id->driver_data;
   8 -
   9 -       if (info->jedec_id) {
  10 -               const struct spi_device_id *jid;
  11 -
  12 -               jid = nor->read_id(nor);
  13 -               if (IS_ERR(jid)) {
  14 -                       return PTR_ERR(jid);
  15 -               } else if (jid != id) {
  16 -                       /*
  17 -                        * JEDEC knows better, so overwrite platform ID. We
  18 -                        * can't trust partitions any longer, but we'll let
  19 -                        * mtd apply them anyway, since some partitions may be
  20 -                        * marked read-only, and we don't want to lose that
  21 -                        * information, even if it's not 100% accurate.
  22 -                        */
  23 -                       dev_warn(dev, "found %s, expected %s\n",
  24 -                                jid->name, id->name);
  25 -                       id = jid;
  26 -                       info = (void *)jid->driver_data;
  27 +       if (id) {
  28 +               info = (void *)id->driver_data;
  29 +               if (info->jedec_id) {
  30 +                       dev_warn(dev,
  31 +                                "passed SPI device ID (%s) contains JEDEC, ignoring it, driver should be fixed!\n",
  32 +                                id->name);
  33 +                       id = NULL;
  34                 }
  35         }
  36
  37 +       if (!id) {
  38 +               id = nor->read_id(nor);
  39 +               if (IS_ERR(id))
  40 +                       return PTR_ERR(id);
  41 +       }
  42 +       info = (void *)id->driver_data;
  43 +
  44         mutex_init(&nor->lock);
  45
  46         /*