1 files changed, 4 insertions, 2 deletions

diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index 71d5f2f29fa6..43bb34c9b8bf 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -342,9 +342,11 @@ static void hystart_update(struct sock *sk, u32 delay)
                 u32 curr_jiffies = jiffies;
 
                 /* first detection parameter - ack-train detection */
-                if (curr_jiffies - ca->last_jiffies <= msecs_to_jiffies(2)) {
+                if ((s32)(curr_jiffies - ca->last_jiffies) <=
+                    msecs_to_jiffies(2)) {
                         ca->last_jiffies = curr_jiffies;
-                        if (curr_jiffies - ca->round_start >= ca->delay_min>>4)
+                        if ((s32) (curr_jiffies - ca->round_start) >
+                            ca->delay_min >> 4)
                                 ca->found |= HYSTART_ACK_TRAIN;
                 }