target/linux/generic/patches-3.1/440-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 @@ -232,11 +233,12 @@ 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         const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
  19         struct block_device *bdev;
  20         struct block2mtd_dev *dev;
  21 +       struct mtd_partition *part;
  22         char *name;
  23
  24         if (!devname)
  25 @@ -275,13 +277,16 @@ static struct block2mtd_dev *add_device(
  26
  27         /* Setup the MTD structure */
  28         /* make the name contain the block device in */
  29 -       name = kasprintf(GFP_KERNEL, "block2mtd: %s", devname);
  30 +       if (!mtdname)
  31 +               mtdname = devname;
  32 +       name = kmalloc(strlen(mtdname) + 1, GFP_KERNEL);
  33         if (!name)
  34                 goto devinit_err;
  35
  36 +       strcpy(name, mtdname);
  37         dev->mtd.name = name;
  38
  39 -       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
  40 +       dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK & ~(erase_size - 1);
  41         dev->mtd.erasesize = erase_size;
  42         dev->mtd.writesize = 1;
  43         dev->mtd.type = MTD_RAM;
  44 @@ -294,14 +299,17 @@ static struct block2mtd_dev *add_device(
  45         dev->mtd.priv = dev;
  46         dev->mtd.owner = THIS_MODULE;
  47
  48 -       if (mtd_device_register(&dev->mtd, NULL, 0)) {
  49 +       part = kzalloc(sizeof(struct mtd_partition), GFP_KERNEL);
  50 +       part->name = name;
  51 +       part->offset = 0;
  52 +       part->size = dev->mtd.size;
  53 +       if (mtd_device_register(&dev->mtd, part, 1)) {
  54                 /* Device didn't get added, so free the entry */
  55                 goto devinit_err;
  56         }
  57         list_add(&dev->list, &blkmtd_device_list);
  58         INFO("mtd%d: [%s] erase_size = %dKiB [%d]", dev->mtd.index,
  59 -                       dev->mtd.name + strlen("block2mtd: "),
  60 -                       dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  61 +                       mtdname, dev->mtd.erasesize >> 10, dev->mtd.erasesize);
  62         return dev;
  63
  64  devinit_err:
  65 @@ -374,9 +382,9 @@ static char block2mtd_paramline[80 + 12]
  66
  67  static int block2mtd_setup2(const char *val)
  68  {
  69 -       char buf[80 + 12]; /* 80 for device, 12 for erase size */
  70 +       char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
  71         char *str = buf;
  72 -       char *token[2];
  73 +       char *token[3];
  74         char *name;
  75         size_t erase_size = PAGE_SIZE;
  76         int i, ret;
  77 @@ -387,7 +395,7 @@ static int block2mtd_setup2(const char *
  78         strcpy(str, val);
  79         kill_final_newline(str);
  80
  81 -       for (i = 0; i < 2; i++)
  82 +       for (i = 0; i < 3; i++)
  83                 token[i] = strsep(&str, ",");
  84
  85         if (str)
  86 @@ -406,8 +414,10 @@ static int block2mtd_setup2(const char *
  87                         parse_err("illegal erase size");
  88                 }
  89         }
  90 +       if (token[2] && (strlen(token[2]) + 1 > 80))
  91 +               parse_err("mtd device name too long");
  92
  93 -       add_device(name, erase_size);
  94 +       add_device(name, erase_size, token[2]);
  95
  96         return 0;
  97  }
  98 @@ -441,7 +451,7 @@ static int block2mtd_setup(const char *v
  99
 100
 101  module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
 102 -MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>]\"");
 103 +MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
 104
 105  static int __init block2mtd_init(void)
 106  {
 107 --- a/fs/partitions/check.c
 108 +++ b/fs/partitions/check.c
 109 @@ -664,6 +664,7 @@ rescan:
 110         kfree(state);
 111         return 0;
 112  }
 113 +EXPORT_SYMBOL(rescan_partitions);
 114
 115  unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
 116  {