target/linux/generic-2.6/patches-2.6.23/060-block2mtd_init.patch

   1 Index: linux-2.6.23-rc6/drivers/mtd/devices/block2mtd.c
   2 ===================================================================
   3 --- linux-2.6.23-rc6.orig/drivers/mtd/devices/block2mtd.c       2007-09-21 16:23:54.000000000 +0800
   4 +++ linux-2.6.23-rc6/drivers/mtd/devices/block2mtd.c    2007-09-21 16:23:59.000000000 +0800
   5 @@ -16,6 +16,7 @@
   6  #include <linux/list.h>
   7  #include <linux/init.h>
   8  #include <linux/mtd/mtd.h>
   9 +#include <linux/mtd/partitions.h>
  10  #include <linux/buffer_head.h>
  11  #include <linux/mutex.h>
  12  #include <linux/mount.h>
  13 @@ -237,10 +238,11 @@
  14
  15
  16  /* FIXME: ensure that mtd->size % erase_size == 0 */
  17 -static struct block2mtd_dev *add_device(char *devname, int erase_size)
  18 +static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
  19  {
  20         struct block_device *bdev;
  21         struct block2mtd_dev *dev;
  22 +       struct mtd_partition *part;
  23
  24         if (!devname)
  25                 return NULL;
  26 @@ -279,14 +281,18 @@
  27
  28         /* Setup the MTD structure */
  29         /* make the name contain the block device in */
  30 -       dev->mtd.name = kmalloc(sizeof("block2mtd: ") + strlen(devname),
  31 -                       GFP_KERNEL);
  32 +
  33 +       if (!mtdname)
  34 +               mtdname = devname;
  35 +
  36 +       dev->mtd.name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
  37 +
  38         if (!dev->mtd.name)
  39                 goto devinit_err;
  40 +
  41 +       strcpy(dev->mtd.name, mtdname);
  42
  43 -       sprintf(dev->mtd.name, "block2mtd: %s", devname);
  44 -
  45 -       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
  46 +       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
  47         dev->mtd.erasesize = erase_size;
  48         dev->mtd.writesize = 1;
  49         dev->mtd.type = MTD_RAM;
  50 @@ -298,15 +304,18 @@
  51         dev->mtd.read = block2mtd_read;
  52         dev->mtd.priv = dev;
  53         dev->mtd.owner = THIS_MODULE;
  54 -
  55 -       if (add_mtd_device(&dev->mtd)) {
  56 +
  57 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  58 +       part->name = dev->mtd.name;
  59 +       part->offset = 0;
  60 +       part->size = dev->mtd.size;
  61 +       if (add_mtd_partitions(&dev->mtd, part, 1)) {
  62                 /* Device didnt get added, so free the entry */
  63                 goto devinit_err;
  64         }
  65         list_add(&dev->list, &blkmtd_device_list);
  66         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  67 -                       dev->mtd.name + strlen("blkmtd: "),
  68 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  69 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  70         return dev;
  71
  72  devinit_err:
  73 @@ -379,9 +388,9 @@
  74
  75  static int block2mtd_setup2(const char *val)
  76  {
  77 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  78 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  79         char *str = buf;
  80 -       char *token[2];
  81 +       char *token[3];
  82         char *name;
  83         size_t erase_size = PAGE_SIZE;
  84         int i, ret;
  85 @@ -392,7 +401,7 @@
  86         strcpy(str, val);
  87         kill_final_newline(str);
  88
  89 -       for (i = 0; i < 2; i++)
  90 +       for (i = 0; i < 3; i++)
  91                 token[i] = strsep(&str, ",");
  92
  93         if (str)
  94 @@ -412,8 +421,10 @@
  95                         parse_err("illegal erase size");
  96                 }
  97         }
  98 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  99 +               parse_err("mtd device name too long");
 100
 101 -       add_device(name, erase_size);
 102 +       add_device(name, erase_size, token[2]);
 103
 104         return 0;
 105  }
 106 @@ -447,7 +458,7 @@
 107
 108
 109  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 110 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 111 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 112
 113  static int __init block2mtd_init(void)
 114  {