target/linux/generic/patches-2.6.31/060-block2mtd_init.patch

   1 --- a/drivers/mtd/devices/block2mtd.c
   2 +++ b/drivers/mtd/devices/block2mtd.c
   3 @@ -14,6 +14,7 @@
   4  #include <linux/list.h>
   5  #include <linux/init.h>
   6  #include <linux/mtd/mtd.h>
   7 +#include <linux/mtd/partitions.h>
   8  #include <linux/buffer_head.h>
   9  #include <linux/mutex.h>
  10  #include <linux/mount.h>
  11 @@ -232,10 +233,11 @@ static void block2mtd_free_device(struct
  12
  13
  14  /* FIXME: ensure that mtd->size % erase_size == 0 */
  15 -static struct block2mtd_dev *add_device(char *devname, int erase_size)
  16 +static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
  17  {
  18         struct block_device *bdev;
  19         struct block2mtd_dev *dev;
  20 +       struct mtd_partition *part;
  21         char *name;
  22
  23         if (!devname)
  24 @@ -273,17 +275,17 @@ static struct block2mtd_dev *add_device(
  25
  26         mutex_init(&dev->write_mutex);
  27
  28 -       /* Setup the MTD structure */
  29 -       /* make the name contain the block device in */
  30 -       name = kmalloc(sizeof("block2mtd: ") + strlen(devname) + 1,
  31 -                       GFP_KERNEL);
  32 +       if (!mtdname)
  33 +               mtdname = devname;
  34 +
  35 +       name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
  36         if (!name)
  37                 goto devinit_err;
  38
  39 -       sprintf(name, "block2mtd: %s", devname);
  40 +       strcpy(name, mtdname);
  41         dev->mtd.name = name;
  42
  43 -       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
  44 +       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
  45         dev->mtd.erasesize = erase_size;
  46         dev->mtd.writesize = 1;
  47         dev->mtd.type = MTD_RAM;
  48 @@ -296,14 +298,17 @@ static struct block2mtd_dev *add_device(
  49         dev->mtd.priv = dev;
  50         dev->mtd.owner = THIS_MODULE;
  51
  52 -       if (add_mtd_device(&dev->mtd)) {
  53 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  54 +       part->name = dev->mtd.name;
  55 +       part->offset = 0;
  56 +       part->size = dev->mtd.size;
  57 +       if (add_mtd_partitions(&dev->mtd, part, 1)) {
  58                 /* Device didnt get added, so free the entry */
  59                 goto devinit_err;
  60         }
  61         list_add(&dev->list, &blkmtd_device_list);
  62         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  63 -                       dev->mtd.name + strlen("block2mtd: "),
  64 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  65 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  66         return dev;
  67
  68  devinit_err:
  69 @@ -376,9 +381,9 @@ static char block2mtd_paramline[80 + 12]
  70
  71  static int block2mtd_setup2(const char *val)
  72  {
  73 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  74 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  75         char *str = buf;
  76 -       char *token[2];
  77 +       char *token[3];
  78         char *name;
  79         size_t erase_size = PAGE_SIZE;
  80         int i, ret;
  81 @@ -389,7 +394,7 @@ static int block2mtd_setup2(const char *
  82         strcpy(str, val);
  83         kill_final_newline(str);
  84
  85 -       for (i = 0; i < 2; i++)
  86 +       for (i = 0; i < 3; i++)
  87                 token[i] = strsep(&str, ",");
  88
  89         if (str)
  90 @@ -408,8 +413,10 @@ static int block2mtd_setup2(const char *
  91                         parse_err("illegal erase size");
  92                 }
  93         }
  94 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  95 +               parse_err("mtd device name too long");
  96
  97 -       add_device(name, erase_size);
  98 +       add_device(name, erase_size, token[2]);
  99
 100         return 0;
 101  }
 102 @@ -443,7 +450,7 @@ static int block2mtd_setup(const char *v
 103
 104
 105  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 106 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 107 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 108
 109  static int __init block2mtd_init(void)
 110  {