Merge branch 'drm-fixes-3.7' of git://people.freedesktop.org/~agd5f/linux into drm...

[~andy/linux] / net / ipv4 / tcp_illinois.c

diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c
index 813b43a76fece71e2614878a5830962d55f35a22..834857f3c8713e8d8b80ab7b4f413725ec0ca9b4 100644 (file)
--- a/net/ipv4/tcp_illinois.c
+++ b/net/ipv4/tcp_illinois.c
@@ -313,11 +313,13 @@ static void tcp_illinois_info(struct sock *sk, u32 ext,
                        .tcpv_rttcnt = ca->cnt_rtt,
                        .tcpv_minrtt = ca->base_rtt,
                };
-               u64 t = ca->sum_rtt;
 
-               do_div(t, ca->cnt_rtt);
-               info.tcpv_rtt = t;
+               if (info.tcpv_rttcnt > 0) {
+                       u64 t = ca->sum_rtt;
 
+                       do_div(t, info.tcpv_rttcnt);
+                       info.tcpv_rtt = t;
+               }
                nla_put(skb, INET_DIAG_VEGASINFO, sizeof(info), &info);
        }
 }