From: Simon Zhang <yuwei1.zhang@intel.com>
Date: Tue, 24 Dec 2019 12:02:20 +0000 (+0800)
Subject: tcp: fix tcp check tx offload issue
X-Git-Tag: v19.08.3~191
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F90%2F28290%2F3;p=vpp.git

tcp: fix tcp check tx offload issue

Type: fix

Signed-off-by: Simon Zhang <yuwei1.zhang@intel.com>
Change-Id: I3b8755831d762abf51e1cbe1b57024f9297de9a4
Signed-off-by: Simon Zhang <yuwei1.zhang@intel.com>
(cherry picked from commit 79bfb9e09c7bf2072d34b2ed6159ba11815dab3a)
---

diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 160aac02f17..17af200f67c 100755
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -2429,11 +2429,15 @@ tcp_check_tx_offload (tcp_connection_t * tc, int is_ipv4)
     }
 
   lb = load_balance_get (lb_idx);
+  if (PREDICT_FALSE (lb->lb_n_buckets > 1))
+    return;
   dpo = load_balance_get_bucket_i (lb, 0);
 
-  sw_if_idx = dpo->dpoi_index;
-  hw_if = vnet_get_sup_hw_interface (vnm, sw_if_idx);
+  sw_if_idx = dpo_get_urpf (dpo);
+  if (PREDICT_FALSE (sw_if_idx == ~0))
+    return;
 
+  hw_if = vnet_get_sup_hw_interface (vnm, sw_if_idx);
   if (hw_if->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
     tc->cfg_flags |= TCP_CFG_F_TSO;
 }