[dts] [PATCH v1] tests/vf_packet_rxtx: fix test case failures in vf_reset

[Herbert Guan]

1) Clear port stats before send/recv test packets
2) Ensure igb_uio driver is installed if driver='igb_uio'


Signed-off-by: Herbert Guan <herbert.guan at arm.com>
---
 tests/TestSuite_vf_packet_rxtx.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/TestSuite_vf_packet_rxtx.py b/tests/TestSuite_vf_packet_rxtx.py
index 63f4820..f0b7721 100644
--- a/tests/TestSuite_vf_packet_rxtx.py
+++ b/tests/TestSuite_vf_packet_rxtx.py
@@ -125,6 +125,9 @@ class TestVfPacketRxtx(TestCase):
     def packet_rx_tx(self, driver='default'):
 
         if driver == 'igb_uio':
+            # ensure igb_uio driver is installed
+            self.dut.send_expect('(lsmod | grep uio) || (modprobe uio)', '#')
+            self.dut.send_expect('(lsmod | grep igb_uio) || (insmod ./%s/kmod/igb_uio.ko)' % self.target,'#')
             self.setup_2pf_2vf_1vm_env(driver='igb_uio')
         else:
             self.setup_2pf_2vf_1vm_env(driver='')
@@ -279,6 +282,7 @@ class TestVfPacketRxtx(TestCase):
         rx_port = tx_port
 
         dst_mac = pmd0_vf0_mac
+        self.vm0_testpmd.execute_cmd('clear port stats all')
         self.tester.sendpkt_bg(tx_port, dst_mac)
 
         #vf port stop/start can trigger reset action
-- 
1.8.3.1