1 files changed, 8 insertions, 3 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 828ea211ff21..ec834480abe7 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -419,7 +419,8 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
         struct inet_connection_sock *icsk = inet_csk(parent);
         struct request_sock_queue *queue = &icsk->icsk_accept_queue;
         struct listen_sock *lopt = queue->listen_opt;
-        int thresh = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries;
+        int max_retries = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries;
+        int thresh = max_retries;
         unsigned long now = jiffies;
         struct request_sock **reqp, *req;
         int i, budget;
@@ -455,6 +456,9 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
                 }
         }
 
+        if (queue->rskq_defer_accept)
+                max_retries = queue->rskq_defer_accept;
+
         budget = 2 * (lopt->nr_table_entries / (timeout / interval));
         i = lopt->clock_hand;
 
@@ -462,8 +466,9 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
                 reqp=&lopt->syn_table[i];
                 while ((req = *reqp) != NULL) {
                         if (time_after_eq(now, req->expires)) {
-                                if (req->retrans < thresh &&
-                                    !req->rsk_ops->rtx_syn_ack(parent, req)) {
+                                if ((req->retrans < thresh ||
+                                     (inet_rsk(req)->acked && req->retrans < max_retries))
+                                    && !req->rsk_ops->rtx_syn_ack(parent, req)) {
                                         unsigned long timeo;
 
                                         if (req->retrans++ == 0)