[TCP/DCCP]: Introduce net_xmit_eval

Throughout the TCP/DCCP (and tunnelling) code, it often happens that the
return code of a transmit function needs to be tested against NET_XMIT_CN
which is a value that does not indicate a strict error condition.

This patch uses a macro for these recurring situations which is consistent
with the already existing macro net_xmit_errno, saving on duplicated code.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 9a8e690fdf7c..9a88395a7629 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -502,8 +502,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 
                 ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr);
                 err = ip6_xmit(sk, skb, &fl, opt, 0);
-                if (err == NET_XMIT_CN)
-                        err = 0;
+                err = net_xmit_eval(err);
         }
 
 done: