target/linux/generic-2.6/patches/065-block2mtd_init.patch

   1 diff -urN linux-2.6.21.1.old/drivers/mtd/devices/block2mtd.c linux-2.6.21.1.dev/drivers/mtd/devices/block2mtd.c
   2 --- linux-2.6.21.1.old/drivers/mtd/devices/block2mtd.c  2007-04-27 23:49:26.000000000 +0200
   3 +++ linux-2.6.21.1.dev/drivers/mtd/devices/block2mtd.c  2007-05-26 20:06:13.547923960 +0200
   4 @@ -16,6 +16,7 @@
   5  #include <linux/list.h>
   6  #include <linux/init.h>
   7  #include <linux/mtd/mtd.h>
   8 +#include <linux/mtd/partitions.h>
   9  #include <linux/buffer_head.h>
  10  #include <linux/mutex.h>
  11  #include <linux/mount.h>
  12 @@ -288,10 +289,11 @@
  13
  14
  15  /* FIXME: ensure that mtd->size % erase_size == 0 */
  16 -static struct block2mtd_dev *add_device(char *devname, int erase_size)
  17 +static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname)
  18  {
  19         struct block_device *bdev;
  20         struct block2mtd_dev *dev;
  21 +       struct mtd_partition *part;
  22
  23         if (!devname)
  24                 return NULL;
  25 @@ -330,14 +332,18 @@
  26
  27         /* Setup the MTD structure */
  28         /* make the name contain the block device in */
  29 -       dev->mtd.name = kmalloc(sizeof("block2mtd: ") + strlen(devname),
  30 -                       GFP_KERNEL);
  31 +
  32 +       if (!mtdname)
  33 +               mtdname = devname;
  34 +
  35 +       dev->mtd.name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
  36 +
  37         if (!dev->mtd.name)
  38                 goto devinit_err;
  39 +
  40 +       strcpy(dev->mtd.name, mtdname);
  41
  42 -       sprintf(dev->mtd.name, "block2mtd: %s", devname);
  43 -
  44 -       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
  45 +       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
  46         dev->mtd.erasesize = erase_size;
  47         dev->mtd.writesize = 1;
  48         dev->mtd.type = MTD_RAM;
  49 @@ -349,15 +355,18 @@
  50         dev->mtd.read = block2mtd_read;
  51         dev->mtd.priv = dev;
  52         dev->mtd.owner = THIS_MODULE;
  53 -
  54 -       if (add_mtd_device(&dev->mtd)) {
  55 +
  56 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  57 +       part->name = dev->mtd.name;
  58 +       part->offset = 0;
  59 +       part->size = dev->mtd.size;
  60 +       if (add_mtd_partitions(&dev->mtd, part, 1)) {
  61                 /* Device didnt get added, so free the entry */
  62                 goto devinit_err;
  63         }
  64         list_add(&dev->list, &blkmtd_device_list);
  65         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  66 -                       dev->mtd.name + strlen("blkmtd: "),
  67 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  68 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  69         return dev;
  70
  71  devinit_err:
  72 @@ -430,9 +439,9 @@
  73
  74  static int block2mtd_setup2(const char *val)
  75  {
  76 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  77 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  78         char *str = buf;
  79 -       char *token[2];
  80 +       char *token[3];
  81         char *name;
  82         size_t erase_size = PAGE_SIZE;
  83         int i, ret;
  84 @@ -443,7 +452,7 @@
  85         strcpy(str, val);
  86         kill_final_newline(str);
  87
  88 -       for (i = 0; i < 2; i++)
  89 +       for (i = 0; i < 3; i++)
  90                 token[i] = strsep(&str, ",");
  91
  92         if (str)
  93 @@ -463,8 +472,10 @@
  94                         parse_err("illegal erase size");
  95                 }
  96         }
  97 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  98 +               parse_err("mtd device name too long");
  99
 100 -       add_device(name, erase_size);
 101 +       add_device(name, erase_size, token[2]);
 102
 103         return 0;
 104  }
 105 @@ -498,7 +509,7 @@
 106
 107
 108  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 109 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 110 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 111
 112  static int __init block2mtd_init(void)
 113  {