[TCP]: Remove TCPCB_URG & TCPCB_AT_TAIL as unnecessary

The snd_up check should be enough. I suspect this has been
there to provide a minor optimization in clean_rtx_queue which
used to have a small if (!->sacked) block which could skip
snd_up check among the other work.

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

1 files changed, 1 insertions, 2 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 7bac1fac065f..1e7fd8113663 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2821,8 +2821,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets)
                 if (sacked & TCPCB_LOST)
                         tp->lost_out -= acked_pcount;
 
-                if (unlikely((sacked & TCPCB_URG) && tp->urg_mode &&
-                             !before(end_seq, tp->snd_up)))
+                if (unlikely(tp->urg_mode && !before(end_seq, tp->snd_up)))
                         tp->urg_mode = 0;
 
                 tp->packets_out -= acked_pcount;