sctp: Correctly start rtx timer on new packet transmissions.

[ Upstream commit 6574df9a89f9f7da3a4e5cee7633d430319d3350 ]

Commit 62aeaff5ccd96462b7077046357a6d7886175a57
(sctp: Start T3-RTX timer when fast retransmitting lowest TSN)
introduced a regression where it was possible to forcibly
restart the sctp retransmit timer at the transmission of any
new chunk.  This resulted in much longer timeout times and
sometimes hung sctp connections.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 247ebc95c1e59186ade6e76aec48fd3c57f7738c..bc411c89621635159713716a1747253f6d138a27 100644 (file)
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -929,7 +929,6 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
                }
 
                /* Finally, transmit new packets.  */
-               start_timer = 0;
                while ((chunk = sctp_outq_dequeue_data(q)) != NULL) {
                        /* RFC 2960 6.5 Every DATA chunk MUST carry a valid
                         * stream identifier.
@@ -1028,7 +1027,7 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
                        list_add_tail(&chunk->transmitted_list,
                                      &transport->transmitted);
 
-                       sctp_transport_reset_timers(transport, start_timer-1);
+                       sctp_transport_reset_timers(transport, 0);
 
                        q->empty = 0;