[SCTP]: Clean up stale data during association restart

During association restart we may have stale data sitting
on the ULP queue waiting for ordering or reassembly.  This
data may cause severe problems if not cleaned up.  In particular
stale data pending ordering may cause problems with receive
window exhaustion if our peer has decided to restart the
association.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index f4759a9..bfb197e 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -73,7 +73,7 @@
 
 
 /* Flush the reassembly and ordering queues.  */
-static void sctp_ulpq_flush(struct sctp_ulpq *ulpq)
+void sctp_ulpq_flush(struct sctp_ulpq *ulpq)
 {
 	struct sk_buff *skb;
 	struct sctp_ulpevent *event;