dccp: schedule an Ack when receiving timestamps

This schedules an Ack when receiving a timestamp, exploiting the
existing inet_csk_schedule_ack() function, saving one case in the
`dccp_ack_pending()' function.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>

2 files changed, 3 insertions, 2 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 60f4f9622ab3..3eb264b60823 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -459,8 +459,7 @@ static inline void dccp_update_gss(struct sock *sk, u64 seq)
 static inline int dccp_ack_pending(const struct sock *sk)
 {
         const struct dccp_sock *dp = dccp_sk(sk);
-        return dp->dccps_timestamp_echo != 0 ||
-               (dp->dccps_hc_rx_ackvec != NULL &&
+        return (dp->dccps_hc_rx_ackvec != NULL &&
                 dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
                inet_csk_ack_scheduled(sk);
 }
diff --git a/net/dccp/options.c b/net/dccp/options.c
index d4b1ae0daacb..cd3061813009 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -163,6 +163,8 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
                                       dccp_role(sk), ntohl(opt_val),
                                       (unsigned long long)
                                       DCCP_SKB_CB(skb)->dccpd_ack_seq);
+                        /* schedule an Ack in case this sender is quiescent */
+                        inet_csk_schedule_ack(sk);
                         break;
                 case DCCPO_TIMESTAMP_ECHO:
                         if (len != 4 && len != 6 && len != 8)