target/linux/generic-2.6/patches-2.6.22/060-block2mtd_init.patch

   1 --- a/drivers/mtd/devices/block2mtd.c
   2 +++ b/drivers/mtd/devices/block2mtd.c
   3 @@ -16,6 +16,7 @@
   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 @@ -237,10 +238,11 @@
  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, char *mtdname)
  17  {
  18         struct block_device *bdev;
  19         struct block2mtd_dev *dev;
  20 +       struct mtd_partition *part;
  21
  22         if (!devname)
  23                 return NULL;
  24 @@ -279,14 +281,18 @@
  25
  26         /* Setup the MTD structure */
  27         /* make the name contain the block device in */
  28 -       dev->mtd.name = kmalloc(sizeof("block2mtd: ") + strlen(devname),
  29 -                       GFP_KERNEL);
  30 +
  31 +       if (!mtdname)
  32 +               mtdname = devname;
  33 +
  34 +       dev->mtd.name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
  35 +
  36         if (!dev->mtd.name)
  37                 goto devinit_err;
  38 +
  39 +       strcpy(dev->mtd.name, mtdname);
  40
  41 -       sprintf(dev->mtd.name, "block2mtd: %s", devname);
  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 @@ -298,15 +304,18 @@
  49         dev->mtd.read = block2mtd_read;
  50         dev->mtd.priv = dev;
  51         dev->mtd.owner = THIS_MODULE;
  52 -
  53 -       if (add_mtd_device(&dev->mtd)) {
  54 +
  55 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  56 +       part->name = dev->mtd.name;
  57 +       part->offset = 0;
  58 +       part->size = dev->mtd.size;
  59 +       if (add_mtd_partitions(&dev->mtd, part, 1)) {
  60                 /* Device didnt get added, so free the entry */
  61                 goto devinit_err;
  62         }
  63         list_add(&dev->list, &blkmtd_device_list);
  64         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  65 -                       dev->mtd.name + strlen("blkmtd: "),
  66 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  67 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  68         return dev;
  69
  70  devinit_err:
  71 @@ -379,9 +388,9 @@
  72
  73  static int block2mtd_setup2(const char *val)
  74  {
  75 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  76 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  77         char *str = buf;
  78 -       char *token[2];
  79 +       char *token[3];
  80         char *name;
  81         size_t erase_size = PAGE_SIZE;
  82         int i, ret;
  83 @@ -392,7 +401,7 @@
  84         strcpy(str, val);
  85         kill_final_newline(str);
  86
  87 -       for (i = 0; i < 2; i++)
  88 +       for (i = 0; i < 3; i++)
  89                 token[i] = strsep(&str, ",");
  90
  91         if (str)
  92 @@ -412,8 +421,10 @@
  93                         parse_err("illegal erase size");
  94                 }
  95         }
  96 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  97 +               parse_err("mtd device name too long");
  98
  99 -       add_device(name, erase_size);
 100 +       add_device(name, erase_size, token[2]);
 101
 102         return 0;
 103  }
 104 @@ -447,7 +458,7 @@
 105
 106
 107  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 108 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 109 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 110
 111  static int __init block2mtd_init(void)
 112  {