I trace the code, and it seems that it's a problem with getting the
partitioning information.
I'm going to search in this way.

here's the trace I get :
mount -tyaffs2 /dev/mtdblock0 /mnt/mtd0
  into yaffs2_read_super_mtd
    into get_sb_bdev
      into open_bdev_excl
        into do_open
->       get_gendisk : kobj_lookup returned NULL   <-
        do_open : get_gendisk error
      open_bdev_excl : blkdev_get error
    open_bdev_excl error : IS_ERR(bdev) = -6
  get_sb_bdev result=-6

mount: Mounting /dev/mtdblock0 on /mnt/mtd0 failed: No such device or address



2007/3/20, Charles Manning <manningc2@actrix.gen.nz>:
> On Wednesday 21 March 2007 04:31, Richard Genoud wrote:
> > mount -t yaffs2 /dev/mtdblock0 /mnt/mtd0/
> > mount: Mounting /dev/mtdblock0 on /mnt/mtd0/ failed: No such device or
> > address
>
> You are not getting any yaffs:xxx messages  so it looks like the call is being
> rejected by mount even before it gets to call any specific yaffs code.
>
> You can also try turning on more yaffs tracing to see if that helps.
>