[dts] [PATCH V2 1/2] tests/TestSuite_vf_jumboframe:Rx packet size need add 4 bytes

[Xie wei <weix.xie@intel.com>]

DTS framework has switched i40evf to iavf, so align with it.
After testing, found that:
when send a packet which length is 1513 bytes.
for net_iavf driver; the statistic from "show port stats 0" is: RX-bytes: 1513
for net_i40e_vf driver; the statistic from "show port stats 0" is: RX-bytes: 1517

Signed-off-by: Xie wei <weix.xie@intel.com>
---
 tests/TestSuite_vf_jumboframe.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tests/TestSuite_vf_jumboframe.py b/tests/TestSuite_vf_jumboframe.py
index 6da2c5e5..cb77cf31 100644
--- a/tests/TestSuite_vf_jumboframe.py
+++ b/tests/TestSuite_vf_jumboframe.py
@@ -192,6 +192,11 @@ class TestVfJumboFrame(TestCase):
         else:
             return None
 
+    def check_vf_driver(self):
+        output = self.vm_testpmd.execute_cmd("show port info 0")
+        vf0_driver = re.findall("Driver\s*name:\s*(\w+)", output)
+        return vf0_driver[0]
+
     def jumboframes_send_packet(self, pktsize, received=True):
         """
         Send 1 packet to portid
@@ -216,13 +221,19 @@ class TestVfJumboFrame(TestCase):
         rx_bytes -= rx_bytes_ori
         rx_err -= rx_err_ori
 
+        vf_driver = self.check_vf_driver()
+
         if received:
             self.verify((rx_pkts == 1) and (tx_pkts == 1), "Packet forward assert error")
 
             if self.kdriver == "ixgbe" or self.kdriver == 'ice':
                 self.verify((rx_bytes + 4) == pktsize, "Rx packet size should be packet size - 4")
             else:
-                self.verify(rx_bytes == pktsize, "Rx packet size should be equal to packet size")
+                if self.kdriver == "i40e":
+                    if vf_driver == "net_iavf":
+                        self.verify((rx_bytes + 4) == pktsize, "Rx packet size should be packet size - 4")
+                    else:
+                        self.verify(rx_bytes == pktsize, "Rx packet size should be equal to packet size")
 
             if self.kdriver == "igb":
                 self.verify(tx_bytes == pktsize, "Tx packet size should be packet size")
-- 
2.17.1