[PATCH 32/32] tests: Fix scan_dfs false negative by using common finalizer

[Masashi Honma <masashi.honma@xxxxxxxxx>]

scan_dfs fails with this message.

---------------
wlan0: Country code not reset back to 00: is US
wlan0: Country code cleared back to 00
---------------

This patch fixes the issue.

Signed-off-by: Masashi Honma <masashi.honma@xxxxxxxxx>
---
 tests/hwsim/test_scan.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/hwsim/test_scan.py b/tests/hwsim/test_scan.py
index 735ccffc3..220ce2b12 100644
--- a/tests/hwsim/test_scan.py
+++ b/tests/hwsim/test_scan.py
@@ -16,6 +16,7 @@ import subprocess
 import hostapd
 from wpasupplicant import WpaSupplicant
 from utils import HwsimSkip, fail_test, alloc_fail, wait_fail_trigger, parse_ie
+from utils import clear_regdom_dev
 from tshark import run_tshark
 from test_ap_csa import switch_channel, wait_channel_switch, csa_supported
 
@@ -974,8 +975,7 @@ def test_scan_dfs(dev, apdev, params):
     try:
         _test_scan_dfs(dev, apdev, params)
     finally:
-        subprocess.call(['iw', 'reg', 'set', '00'])
-        time.sleep(0.1)
+        clear_regdom_dev(dev)
 
 def _test_scan_dfs(dev, apdev, params):
     subprocess.call(['iw', 'reg', 'set', 'US'])
-- 
2.17.1


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