[PATCH v2] acpi/tests/avocado/bits: wait for 200 seconds for SHUTDOWN event from bits VM

[Ani Sinha]

By default, the timeout to receive any specified event from the QEMU VM is 60
seconds set by the python avocado test framework. Please see event_wait() and
events_wait() in python/qemu/machine/machine.py. If the matching event is not
triggered within that interval, an asyncio.TimeoutError is generated. Since the
timeout for the bits avocado test is 200 secs, we need to make event_wait()
timeout of the same value as well so that an early timeout is not triggered by
the avocado framework.

CC: peter.maydell@linaro.org
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2077
Signed-off-by: Ani Sinha <anisinha@redhat.com>
---
 tests/avocado/acpi-bits.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

changelog:
v2: cosmetic comment updates in code and patch description.

diff --git a/tests/avocado/acpi-bits.py b/tests/avocado/acpi-bits.py
index 68b9e98d4e..efe4f52ee0 100644
--- a/tests/avocado/acpi-bits.py
+++ b/tests/avocado/acpi-bits.py
@@ -54,6 +54,8 @@
 deps = ["xorriso", "mformat"] # dependent tools needed in the test setup/box.
 supported_platforms = ['x86_64'] # supported test platforms.
 
+# default timeout of 120 secs is sometimes not enough for bits test.
+BITS_TIMEOUT = 200
 
 def which(tool):
     """ looks up the full path for @tool, returns None if not found
@@ -133,7 +135,7 @@ class AcpiBitsTest(QemuBaseTest): #pylint: 
disable=too-many-instance-attributes
 
     """
     # in slower systems the test can take as long as 3 minutes to complete.
-    timeout = 200
+    timeout = BITS_TIMEOUT
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -400,7 +402,8 @@ def test_acpi_smbios_bits(self):
 
         # biosbits has been configured to run all the specified test suites
         # in batch mode and then automatically initiate a vm shutdown.
-        # Rely on avocado's unit test timeout.
-        self._vm.event_wait('SHUTDOWN')
+        # Set timeout to BITS_TIMEOUT for SHUTDOWN event from bits VM at par
+        # with the avocado test timeout.
+        self._vm.event_wait('SHUTDOWN', timeout=BITS_TIMEOUT)
         self._vm.wait(timeout=None)
         self.parse_log()
-- 
2.39.2