iotests/245: Fix type for iothread property

iothread is a string property, so None (= JSON null) is not a valid
value for it. Pass the empty string instead to get the default iothread.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211008133442.141332-6-kwolf@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/tests/qemu-iotests/245 b/tests/qemu-iotests/245
index bf8261eec06204e1e19c978a1ec86513225ab0e1..9b12b42eedf655f7b6f6a183edaedbfb0e1a6a3d 100755 (executable)
--- a/tests/qemu-iotests/245
+++ b/tests/qemu-iotests/245
@@ -1189,10 +1189,10 @@ class TestBlockdevReopen(iotests.QMPTestCase):
         self.run_test_iothreads('iothread0', 'iothread0')
 
     def test_iothreads_switch_backing(self):
-        self.run_test_iothreads('iothread0', None)
+        self.run_test_iothreads('iothread0', '')
 
     def test_iothreads_switch_overlay(self):
-        self.run_test_iothreads(None, 'iothread0')
+        self.run_test_iothreads('', 'iothread0')
 
 if __name__ == '__main__':
     iotests.activate_logging()