The ocfs2_stack_driver_request() function failed to increment the
refcount of an already-active stack.  It only did the increment on the
first reference.  Whoops.
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
Tested-by: NMarcos Matsunaga <marcos.matsunaga@oracle.com>
Signed-off-by: NMark Fasheh <mfasheh@suse.com>