If there are more than one events, wait_until_completed() might return
the 2nd event even if the 1st event is JOB_COMPLETED, since the for loop
will continue to run even if completed is set to True.

It never happened before, but it can be triggered when OOB is enabled
due to the RESUME startup message. Fix that up.

Signed-off-by: Peter Xu <pet...@redhat.com>
 tests/qemu-iotests/iotests.py | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index b5d7945af8..119c8e270a 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -470,18 +470,15 @@ class QMPTestCase(unittest.TestCase):
     def wait_until_completed(self, drive='drive0', check_offset=True):
         '''Wait for a block job to finish, returning the event'''
-        completed = False
-        while not completed:
+        while True:
             for event in self.vm.get_qmp_events(wait=True):
                 if event['event'] == 'BLOCK_JOB_COMPLETED':
                     self.assert_qmp(event, 'data/device', drive)
                     self.assert_qmp_absent(event, 'data/error')
                     if check_offset:
                         self.assert_qmp(event, 'data/offset', 
-                    completed = True
-        self.assert_no_active_block_jobs()
-        return event
+                    self.assert_no_active_block_jobs()
+                    return event
     def wait_ready(self, drive='drive0'):
         '''Wait until a block job BLOCK_JOB_READY event'''

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