target/linux/generic-2.6/patches-2.6.26/060-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 -       sprintf(dev->mtd.name, "block2mtd: %s", devname);
  40 +       strcpy(dev->mtd.name, mtdname);
  41
  42 -       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
  43 +       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
  44         dev->mtd.erasesize = erase_size;
  45         dev->mtd.writesize = 1;
  46         dev->mtd.type = MTD_RAM;
  47 @@ -299,14 +305,17 @@
  48         dev->mtd.priv = dev;
  49         dev->mtd.owner = THIS_MODULE;
  50
  51 -       if (add_mtd_device(&dev->mtd)) {
  52 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  53 +       part->name = dev->mtd.name;
  54 +       part->offset = 0;
  55 +       part->size = dev->mtd.size;
  56 +       if (add_mtd_partitions(&dev->mtd, part, 1)) {
  57                 /* Device didnt get added, so free the entry */
  58                 goto devinit_err;
  59         }
  60         list_add(&dev->list, &blkmtd_device_list);
  61         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  62 -                       dev->mtd.name + strlen("block2mtd: "),
  63 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  64 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  65         return dev;
  66
  67  devinit_err:
  68 @@ -379,9 +388,9 @@
  69
  70  static int block2mtd_setup2(const char *val)
  71  {
  72 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  73 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  74         char *str = buf;
  75 -       char *token[2];
  76 +       char *token[3];
  77         char *name;
  78         size_t erase_size = PAGE_SIZE;
  79         int i, ret;
  80 @@ -392,7 +401,7 @@
  81         strcpy(str, val);
  82         kill_final_newline(str);
  83
  84 -       for (i = 0; i < 2; i++)
  85 +       for (i = 0; i < 3; i++)
  86                 token[i] = strsep(&str, ",");
  87
  88         if (str)
  89 @@ -411,8 +420,10 @@
  90                         parse_err("illegal erase size");
  91                 }
  92         }
  93 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  94 +               parse_err("mtd device name too long");
  95
  96 -       add_device(name, erase_size);
  97 +       add_device(name, erase_size, token[2]);
  98
  99         return 0;
 100  }
 101 @@ -446,7 +457,7 @@
 102
 103
 104  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 105 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 106 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 107
 108  static int __init block2mtd_init(void)
 109  {