tcp: tcp_sendmsg() only deals with CHECKSUM_PARTIAL

We no longer have skbs with skb->ip_summed == CHECKSUM_NONE
in TCP write queues.

We can remove dead code in tcp_sendmsg().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 8 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 7c4140271887..a33539798bf6 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1254,14 +1254,10 @@ restart:
 
         while (msg_data_left(msg)) {
                 int copy = 0;
-                int max = size_goal;
 
                 skb = tcp_write_queue_tail(sk);
-                if (skb) {
-                        if (skb->ip_summed == CHECKSUM_NONE)
-                                max = mss_now;
-                        copy = max - skb->len;
-                }
+                if (skb)
+                        copy = size_goal - skb->len;
 
                 if (copy <= 0 || !tcp_skb_can_collapse_to(skb)) {
                         bool first_skb;
@@ -1290,7 +1286,6 @@ new_segment:
 
                         skb_entail(sk, skb);
                         copy = size_goal;
-                        max = size_goal;
 
                         /* All packets are restored as if they have
                          * already been sent. skb_mstamp isn't set to
@@ -1374,7 +1369,7 @@ new_segment:
                         goto out;
                 }
 
-                if (skb->len < max || (flags & MSG_OOB) || unlikely(tp->repair))
+                if (skb->len < size_goal || (flags & MSG_OOB) || unlikely(tp->repair))
                         continue;
 
                 if (forced_push(tp)) {