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-rw-r--r--net/sctp/sm_statefuns.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 8bc279219a72..9e58144f4851 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -5293,10 +5293,18 @@ static int sctp_eat_data(const struct sctp_association *asoc,
5293 * seems a bit troublesome in that frag_point varies based on 5293 * seems a bit troublesome in that frag_point varies based on
5294 * PMTU. In cases, such as loopback, this might be a rather 5294 * PMTU. In cases, such as loopback, this might be a rather
5295 * large spill over. 5295 * large spill over.
5296 * NOTE: If we have a full receive buffer here, we only renege if
5297 * our receiver can still make progress without the tsn being
5298 * received. We do this because in the event that the associations
5299 * receive queue is empty we are filling a leading gap, and since
5300 * reneging moves the gap to the end of the tsn stream, we are likely
5301 * to stall again very shortly. Avoiding the renege when we fill a
5302 * leading gap is a good heuristic for avoiding such steady state
5303 * stalls.
5296 */ 5304 */
5297 if (!asoc->rwnd || asoc->rwnd_over || 5305 if (!asoc->rwnd || asoc->rwnd_over ||
5298 (datalen > asoc->rwnd + asoc->frag_point) || 5306 (datalen > asoc->rwnd + asoc->frag_point) ||
5299 rcvbuf_over) { 5307 (rcvbuf_over && (!skb_queue_len(&sk->sk_receive_queue)))) {
5300 5308
5301 /* If this is the next TSN, consider reneging to make 5309 /* If this is the next TSN, consider reneging to make
5302 * room. Note: Playing nice with a confused sender. A 5310 * room. Note: Playing nice with a confused sender. A