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selftests:kvm: fix get_warnings_count() ignoring fscanf() return warn 

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>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Shuah Khan 2021-09-15 15:28:06 -06:00
parent 8914a7a247
commit 39a71f712d
1 changed files with 2 additions and 1 deletions
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3
tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
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@ -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;