Revert "sctp: Fix bundling of SHUTDOWN with COOKIE-ACK"

This can be reverted as shutdown and cookie_ack chunk are using the
same asoc since the last patch.

This reverts commit 145cb2f7.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Acked-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sctp/sm_statefuns.c

@@ -1892,7 +1892,7 @@ static enum sctp_disposition sctp_sf_do_dupcook_a(
 		 */
 		sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl));
 		return sctp_sf_do_9_2_start_shutdown(net, ep, asoc,
-						     SCTP_ST_CHUNK(0), repl,
+						     SCTP_ST_CHUNK(0), NULL,
 						     commands);
 	} else {
 		sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE,
@@ -5536,7 +5536,7 @@ enum sctp_disposition sctp_sf_do_9_2_start_shutdown(
 	 * in the Cumulative TSN Ack field the last sequential TSN it
 	 * has received from the peer.
 	 */
-	reply = sctp_make_shutdown(asoc, arg);
+	reply = sctp_make_shutdown(asoc, NULL);
 	if (!reply)
 		goto nomem;
 
@@ -6134,7 +6134,7 @@ enum sctp_disposition sctp_sf_autoclose_timer_expire(
 	disposition = SCTP_DISPOSITION_CONSUME;
 	if (sctp_outq_is_empty(&asoc->outqueue)) {
 		disposition = sctp_sf_do_9_2_start_shutdown(net, ep, asoc, type,
-							    NULL, commands);
+							    arg, commands);
 	}
 
 	return disposition;