[PATCH] NetConfigDevice: fix regression in Loopback device

[Jan Tluka]

This is the fix for regression introduced by

commit 83e442284c047e5defc78686d89064b3b45b27f4
NetConfigDevice: don't set loopback device down

NetconfigDeviceGeneric.down() method does also address deconfiguration
and the commit caused that loopback devices kept the configured
addresses after cleanup. The solution is to override the down() method
and do the address removal only.

Signed-off-by: Jan Tluka <jtluka(a)redhat.com&gt;
---
 lnst/Slave/NetConfigDevice.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lnst/Slave/NetConfigDevice.py b/lnst/Slave/NetConfigDevice.py
index 1422850..5de8c73 100644
--- a/lnst/Slave/NetConfigDevice.py
+++ b/lnst/Slave/NetConfigDevice.py
@@ -102,8 +102,12 @@ class NetConfigDeviceLoopback(NetConfigDeviceGeneric):
         # this might have an unpredictable impact on further testing.
         # In case of non-root namespace leaving loopback device up is not
         # a problem since the namespace will get destroyed after recipe is
-        # finished
-        pass
+        # finished. So, we will remove the configured addresses only
+        config = self._dev_config
+        if "addresses" in config:
+            for address in config["addresses"]:
+                exec_cmd("ip addr del %s dev %s" % (address,
config["name"]),
+                         die_on_err=False)
 
 class NetConfigDeviceBond(NetConfigDeviceGeneric):
     _modulename = "bonding"
-- 
2.1.0