tcp: remove sk_check_csum_caps()

Since TCP relies on GSO, we do not need this helper anymore.

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 6f35c12af85a..7c4140271887 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1063,8 +1063,7 @@ EXPORT_SYMBOL_GPL(do_tcp_sendpages);
 int tcp_sendpage_locked(struct sock *sk, struct page *page, int offset,
                         size_t size, int flags)
 {
-        if (!(sk->sk_route_caps & NETIF_F_SG) ||
-            !sk_check_csum_caps(sk))
+        if (!(sk->sk_route_caps & NETIF_F_SG))
                 return sock_no_sendpage_locked(sk, page, offset, size, flags);
 
         tcp_rate_check_app_limited(sk);  /* is sending application-limited? */
@@ -1190,7 +1189,7 @@ int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size)
                         goto out_err;
                 }
 
-                zc = sk_check_csum_caps(sk) && sk->sk_route_caps & NETIF_F_SG;
+                zc = sk->sk_route_caps & NETIF_F_SG;
                 if (!zc)
                         uarg->zerocopy = 0;
         }
@@ -1287,11 +1286,7 @@ new_segment:
                                 goto wait_for_memory;
 
                         process_backlog = true;
-                        /*
-                         * Check whether we can use HW checksum.
-                         */
-                        if (sk_check_csum_caps(sk))
-                                skb->ip_summed = CHECKSUM_PARTIAL;
+                        skb->ip_summed = CHECKSUM_PARTIAL;
 
                         skb_entail(sk, skb);
                         copy = size_goal;