[dts] [PATCH] tests/userspace_ethtool: fix link down verify failure destroyed ports link

[Phil Yang <phil.yang@arm.com>]

Test Case test_dump_driver_info will set ip link down to get the port
link down status. If verification is failed, it won't setup the
port link in the subsequent test.

Add record for this verification and raise exception for the verify
failure to restore the link.

Signed-off-by: Phil Yang <phil.yang@arm.com>
---
 tests/TestSuite_userspace_ethtool.py | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/tests/TestSuite_userspace_ethtool.py b/tests/TestSuite_userspace_ethtool.py
index 2d2199c..eccc77b 100644
--- a/tests/TestSuite_userspace_ethtool.py
+++ b/tests/TestSuite_userspace_ethtool.py
@@ -45,6 +45,7 @@ from etgen import IxiaPacketGenerator
 from settings import HEADER_SIZE
 from settings import SCAPY2IXIA
 from utils import RED
+from exception import VerifyFailure
 
 
 class TestUserspaceEthtool(TestCase, IxiaPacketGenerator):
@@ -256,6 +257,8 @@ class TestUserspaceEthtool(TestCase, IxiaPacketGenerator):
         self.dut.send_expect(self.cmd, "EthApp>", 60)
         # ethtool doesn't support port disconnect by tools of linux 
         # only detect physical link disconnect status
+        verify_pass = True
+        verify_msg = ''
         if self.nic.startswith("fortville") == False:  
             # check link status dump function
             for port in self.ports:
@@ -273,8 +276,14 @@ class TestUserspaceEthtool(TestCase, IxiaPacketGenerator):
                 if m:
                     port = m.group(1)
                     status = m.group(2)
-                    self.verify(status == "Down", "Userspace tool failed to detect link down")
-    
+                    # record link down verification result
+                    # then continue the test to restore ports link
+                    try:
+                        self.verify(status == "Down", "Userspace tool failed to detect port %s link down" % port)
+                    except VerifyFailure as v:
+                        verify_msg += str(v)
+                        verify_pass = False
+
             for port in self.ports:
                 tester_port = self.tester.get_local_port(port)
                 intf = self.tester.get_interface(tester_port)
@@ -294,6 +303,9 @@ class TestUserspaceEthtool(TestCase, IxiaPacketGenerator):
             self.verify((rx_pkts == (ori_rx_pkts + 1)), "Failed to record Rx/Tx packets")
 
         self.dut.send_expect("quit", "# ")
+        # Check port link down verification result
+        if verify_pass == False:
+            raise VerifyFailure(verify_msg)
 
     def test_retrieve_reg(self):
         """
-- 
2.7.4