tcp: fix ssthresh u16 leftover

It was once upon time so that snd_sthresh was a 16-bit quantity.
...That has not been true for long period of time. I run across
some ancient compares which still seem to trust such legacy.
Put all that magic into a single place, I hopefully found all
of them.

Compile tested, though linking of allyesconfig is ridiculous
nowadays it seems.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index af6d6fa00db1..d86784be7ab3 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -761,7 +761,7 @@ void tcp_update_metrics(struct sock *sk)
                         set_dst_metric_rtt(dst, RTAX_RTTVAR, var);
                 }
 
-                if (tp->snd_ssthresh >= 0xFFFF) {
+                if (tcp_in_initial_slowstart(tp)) {
                         /* Slow start still did not finish. */
                         if (dst_metric(dst, RTAX_SSTHRESH) &&
                             !dst_metric_locked(dst, RTAX_SSTHRESH) &&