Also move iface variable to the function which is using it

Signed-off-by: Alexey Kodanev <alexey.koda...@oracle.com>
---
 testcases/lib/test_net.sh |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/testcases/lib/test_net.sh b/testcases/lib/test_net.sh
index d72e84e..acaed84 100644
--- a/testcases/lib/test_net.sh
+++ b/testcases/lib/test_net.sh
@@ -216,6 +216,8 @@ tst_add_ipaddr()
        local mask=24
        [ "$TST_IPV6" ] && mask=64
 
+       local iface=$(tst_iface $type $link_num)
+
        if [ $type = "lhost" ]; then
                tst_resm TINFO "set local addr $(tst_ipaddr)/$mask"
                ip addr add $(tst_ipaddr)/$mask dev $iface || \
@@ -238,8 +240,10 @@ tst_restore_ipaddr()
 
        tst_init_iface $type $link_num
 
-       local iface=$(tst_iface $type $link_num)
+       local backup_tst_ipv6=$TST_IPV6
 
        TST_IPV6= tst_add_ipaddr $type $link_num
        TST_IPV6=6 tst_add_ipaddr $type $link_num
+
+       TST_IPV6=$backup_tst_ipv6
 }
-- 
1.7.1


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