tcp: remove useless assignment

In tcp_send_flag(), a4826ee04b76 has replaced:

    th->doff = sizeof(*th) / 4;
    th->doff += OPT_MSS_LEN / 4;
    th->doff += (1 + OPT_WS_LEN) / 4;

by

    optlen = OPT_MSS_LEN + 1 + OPT_WS_LEN;
    th->doff = (sizeof(*th) + optlen) / 4;

but forgot to remove the useless "th->doff += (1 + OPT_WS_LEN) / 4;"

Fixes: a4826ee04b76 ("tcp: Defer and coalesce all segments with no data (flags) to handler")
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/tcp.c b/tcp.c
index 44468ca..e683dd9 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1693,7 +1693,6 @@ static int tcp_send_flag(struct ctx *c, struct tcp_tap_conn *conn, int flags)
 		*(uint16_t *)data = htons(MIN(USHRT_MAX, mss));
 
 		data += OPT_MSS_LEN - 2;
-		th->doff += OPT_MSS_LEN / 4;
 
 		conn->ws_to_tap = MIN(MAX_WS, tinfo.tcpi_snd_wscale);