[PATCH v2] net/iavf: fix VLAN insertion in vector path

[Wenzhuo Lu]

As the VLAN insertion is partially supported in vector path,
the behavior is different in scalar and vector path.
For a VLAN packet, if using scalar path, the new VLAN tag will
be inserted after the original VLAN tag. If using vector path,
the new VLAN tag is inserted before the original VLAN tag.
To avoid any misleading, disable VLAN insertion in vector path.

Fixes: 059f18ae2aec ("net/iavf: add offload path for Tx AVX512")
Cc: stable at dpdk.org

Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---

v2:
 - Updated iavf.ini.

 doc/guides/nics/features/iavf.ini | 2 +-
 drivers/net/iavf/iavf_rxtx.h      | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/guides/nics/features/iavf.ini b/doc/guides/nics/features/iavf.ini
index fbb5b7d..55a0216 100644
--- a/doc/guides/nics/features/iavf.ini
+++ b/doc/guides/nics/features/iavf.ini
@@ -24,7 +24,7 @@ RSS key update       = Y
 RSS reta update      = Y
 VLAN filter          = Y
 CRC offload          = Y
-VLAN offload         = Y
+VLAN offload         = P
 L3 checksum offload  = Y
 L4 checksum offload  = Y
 Timestamp offload    = P
diff --git a/drivers/net/iavf/iavf_rxtx.h b/drivers/net/iavf/iavf_rxtx.h
index 2bf2e32..8d4a772 100644
--- a/drivers/net/iavf/iavf_rxtx.h
+++ b/drivers/net/iavf/iavf_rxtx.h
@@ -27,13 +27,13 @@
 #define IAVF_VPMD_TX_MAX_FREE_BUF 64
 
 #define IAVF_TX_NO_VECTOR_FLAGS (				 \
+		RTE_ETH_TX_OFFLOAD_VLAN_INSERT |		 \
+		RTE_ETH_TX_OFFLOAD_QINQ_INSERT |		 \
 		RTE_ETH_TX_OFFLOAD_MULTI_SEGS |		 \
 		RTE_ETH_TX_OFFLOAD_TCP_TSO |		 \
 		RTE_ETH_TX_OFFLOAD_SECURITY)
 
 #define IAVF_TX_VECTOR_OFFLOAD (				 \
-		RTE_ETH_TX_OFFLOAD_VLAN_INSERT |		 \
-		RTE_ETH_TX_OFFLOAD_QINQ_INSERT |		 \
 		RTE_ETH_TX_OFFLOAD_IPV4_CKSUM |		 \
 		RTE_ETH_TX_OFFLOAD_SCTP_CKSUM |		 \
 		RTE_ETH_TX_OFFLOAD_UDP_CKSUM |		 \
-- 
1.8.3.1