target/linux/generic/patches-2.6.37/440-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 @@ -275,13 +277,16 @@ static struct block2mtd_dev *add_device(
  25
  26         /* Setup the MTD structure */
  27         /* make the name contain the block device in */
  28 -       name = kasprintf(GFP_KERNEL, "block2mtd: %s", devname);
  29 +       if (!mtdname)
  30 +               mtdname = devname;
  31 +       name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
  32         if (!name)
  33                 goto devinit_err;
  34
  35 +       strcpy(name, mtdname);
  36         dev->mtd.name = name;
  37
  38 -       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
  39 +       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
  40         dev->mtd.erasesize = erase_size;
  41         dev->mtd.writesize = 1;
  42         dev->mtd.type = MTD_RAM;
  43 @@ -294,14 +299,17 @@ static struct block2mtd_dev *add_device(
  44         dev->mtd.priv = dev;
  45         dev->mtd.owner = THIS_MODULE;
  46
  47 -       if (add_mtd_device(&dev->mtd)) {
  48 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  49 +       part->name = dev->mtd.name;
  50 +       part->offset = 0;
  51 +       part->size = dev->mtd.size;
  52 +       if (add_mtd_partitions(&dev->mtd, part, 1)) {
  53                 /* Device didnt get added, so free the entry */
  54                 goto devinit_err;
  55         }
  56         list_add(&dev->list, &blkmtd_device_list);
  57         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  58 -                       dev->mtd.name + strlen("block2mtd: "),
  59 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  60 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  61         return dev;
  62
  63  devinit_err:
  64 @@ -374,9 +382,9 @@ static char block2mtd_paramline[80 + 12]
  65
  66  static int block2mtd_setup2(const char *val)
  67  {
  68 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  69 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  70         char *str = buf;
  71 -       char *token[2];
  72 +       char *token[3];
  73         char *name;
  74         size_t erase_size = PAGE_SIZE;
  75         int i, ret;
  76 @@ -387,7 +395,7 @@ static int block2mtd_setup2(const char *
  77         strcpy(str, val);
  78         kill_final_newline(str);
  79
  80 -       for (i = 0; i < 2; i++)
  81 +       for (i = 0; i < 3; i++)
  82                 token[i] = strsep(&str, ",");
  83
  84         if (str)
  85 @@ -406,8 +414,10 @@ static int block2mtd_setup2(const char *
  86                         parse_err("illegal erase size");
  87                 }
  88         }
  89 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  90 +               parse_err("mtd device name too long");
  91
  92 -       add_device(name, erase_size);
  93 +       add_device(name, erase_size, token[2]);
  94
  95         return 0;
  96  }
  97 @@ -441,7 +451,7 @@ static int block2mtd_setup(const char *v
  98
  99
 100  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 101 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 102 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 103
 104  static int __init block2mtd_init(void)
 105  {
 106 --- a/fs/partitions/check.c
 107 +++ b/fs/partitions/check.c
 108 @@ -715,6 +715,7 @@ rescan:
 109         kfree(state);
 110         return 0;
 111  }
 112 +EXPORT_SYMBOL(rescan_partitions);
 113
 114  unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
 115  {