Merge branch 'sctp-transport-races'

Xin Long says:

====================
fix the transport dead race check by using atomic_add_unless on refcnt

  sctp: fix the transport dead race check by using atomic_add_unless on
    refcnt
  sctp: hold transport before we access t->asoc in sctp proc
  sctp: remove the dead field of sctp_transport
====================

Signed-off-by: David S. Miller <davem@davemloft.net>