[PATCH] selftests: tpm2: Implement class desstructor to close file descriptor

From: Stefan Berger
Date: Fri Sep 09 2022 - 11:21:25 EST


From: Stefan Berger <stefanb@xxxxxxxxxxxxx>

Implement a class destructor to close the open TPM file descriptor
and avoid the following error message:

test_flush_context (tpm2_tests.SpaceTest) ... \
/usr/lib64/python3.6/unittest/case.py:605: ResourceWarning: \
unclosed file <_io.FileIO name='/dev/tpmrm0' mode='rb+' closefd=True>

Fixes: 6ea3dfe1e0732 ("selftests: add TPM 2.0 tests")
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>

---
tools/testing/selftests/tpm2/tpm2.py | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/tpm2/tpm2.py b/tools/testing/selftests/tpm2/tpm2.py
index 057a4f49c79d..c7363c6764fc 100644
--- a/tools/testing/selftests/tpm2/tpm2.py
+++ b/tools/testing/selftests/tpm2/tpm2.py
@@ -371,6 +371,10 @@ class Client:
fcntl.fcntl(self.tpm, fcntl.F_SETFL, flags)
self.tpm_poll = select.poll()

+ def __del__(self):
+ if self.tpm:
+ self.tpm.close()
+
def close(self):
self.tpm.close()

--
2.35.1