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From: Shuah Khan <skhan@linuxfoundation.org>
To: pbonzini@redhat.com, shuah@kernel.org
Cc: Shuah Khan <skhan@linuxfoundation.org>,
	kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/4] selftests:kvm: fix get_warnings_count() ignoring fscanf() return warn
Date: Wed, 15 Sep 2021 15:28:06 -0600	[thread overview]
Message-ID: <9dfad43fb500a77f7a08e5e7b80dcb07172d6e44.1631737524.git.skhan@linuxfoundation.org> (raw)
In-Reply-To: <cover.1631737524.git.skhan@linuxfoundation.org>

Fix get_warnings_count() to check fscanf() return value to get rid
of the following warning:

x86_64/mmio_warning_test.c: In function ‘get_warnings_count’:
x86_64/mmio_warning_test.c:85:2: warning: ignoring return value of ‘fscanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   85 |  fscanf(f, "%d", &warnings);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/testing/selftests/kvm/x86_64/mmio_warning_test.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
index e6480fd5c4bd..8039e1eff938 100644
--- a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
+++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
@@ -82,7 +82,8 @@ int get_warnings_count(void)
 	FILE *f;
 
 	f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
-	fscanf(f, "%d", &warnings);
+	if (fscanf(f, "%d", &warnings) < 1)
+		warnings = 0;
 	fclose(f);
 
 	return warnings;
-- 
2.30.2


  reply	other threads:[~2021-09-15 21:28 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-15 21:28 [PATCH 0/4] selftests: kvm: fscanf warn fixes and cleanups Shuah Khan
2021-09-15 21:28 ` Shuah Khan [this message]
2021-09-15 21:28 ` [PATCH 2/4] selftests:kvm: fix get_trans_hugepagesz() ignoring fscanf() return warn Shuah Khan
2021-09-15 21:28 ` [PATCH 3/4] selftests: kvm: move get_run_delay() into lib/test_util Shuah Khan
2021-09-15 21:28 ` [PATCH 4/4] selftests: kvm: fix get_run_delay() ignoring fscanf() return warn Shuah Khan
2021-09-15 22:34 ` [PATCH 0/4] selftests: kvm: fscanf warn fixes and cleanups Paolo Bonzini
2021-09-16  0:02   ` Shuah Khan
2021-09-16  5:06     ` Paolo Bonzini
2021-09-16 18:31       ` Shuah Khan

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