[TCP]: Seperate DSACK from SACK fast path

Move DSACK code outside the SACK fast-path checking code. If the DSACK
determined that the information was too old we stayed with a partial cache
copied. Most likely this matters very little since the next packet will not be
DSACK and we will find it in the cache. but it's still not good form and there
is little reason to couple the two checks.

Since the SACK receive cache doesn't need the data to be in host order we also
remove the ntohl in the checking loop.

Signed-off-by: Baruch Even <baruch@ev-en.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 3cc70d1a3504..29d3089038ab 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -316,7 +316,7 @@ struct tcp_sock {
         struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */
         struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/
 
-        struct tcp_sack_block recv_sack_cache[4];
+        struct tcp_sack_block_wire recv_sack_cache[4];
 
         /* from STCP, retrans queue hinting */
         struct sk_buff* lost_skb_hint;