Problem in alt_find_dev

I've got a DMA component in my system named "/dev/dma". I copied code from the Memtest template so it should work. However, calling alt_dma_txchan_open("/dev/dma") fails. I traced down into the library code and found that alt_find_dev was performing a memcmp on the name. If I manually change the number of bytes to compare, then memcmp will pass otherwise it fails. Any ideas if I'm doing something wrong?

alt_dev* alt_find_dev(const char* name, alt_llist* llist)
{
  alt_dev* next = (alt_dev*) llist->next;
  alt_32 len;
  // change this line to pass
  len  = strlen(name) + 1; // fails
  len = strlen(name); // passes
  while (next != (alt_dev*) llist)
  {
    if (!memcmp (next->name, name, len))
    {
      /* match found */
      return next;
    }
    next = (alt_dev*) next->llist.next;
  }
  return NULL;
}