selftests/resctrl: Remove duplicate codes that clear each test result file

Before exiting each test function(run_cmt/cat/mbm/mba_test()),
test results("ok","not ok") are printed by ksft_test_result() and then
temporary result files are cleaned by function
cmt/cat/mbm/mba_test_cleanup().
However, before running ksft_test_result(),
function cmt/cat/mbm/mba_test_cleanup()
has been run in each test function as follows:
  cmt_resctrl_val()
  cat_perf_miss_val()
  mba_schemata_change()
  mbm_bw_change()

Remove duplicate codes that clear each test result file,
while ensuring cleanup properly even when errors occur in each test.
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/resctrl/cmt_test.c

@@ -132,13 +132,12 @@ int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
 
 	ret = resctrl_val(benchmark_cmd, &param);
 	if (ret)
-		return ret;
+		goto out;
 
 	ret = check_results(&param, n);
-	if (ret)
-		return ret;
 
+out:
 	cmt_test_cleanup();
 
-	return 0;
+	return ret;
 }

tools/testing/selftests/resctrl/mba_test.c

@@ -165,13 +165,12 @@ int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
 
 	ret = resctrl_val(benchmark_cmd, &param);
 	if (ret)
-		return ret;
+		goto out;
 
 	ret = check_results();
-	if (ret)
-		return ret;
 
+out:
 	mba_test_cleanup();
 
-	return 0;
+	return ret;
 }

tools/testing/selftests/resctrl/mbm_test.c

@@ -134,13 +134,12 @@ int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd)
 
 	ret = resctrl_val(benchmark_cmd, &param);
 	if (ret)
-		return ret;
+		goto out;
 
 	ret = check_results(span);
-	if (ret)
-		return ret;
 
+out:
 	mbm_test_cleanup();
 
-	return 0;
+	return ret;
 }

tools/testing/selftests/resctrl/resctrl_tests.c

@@ -88,7 +88,6 @@ static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
 	ksft_test_result(!res, "MBM: bw change\n");
 	if ((get_vendor() == ARCH_INTEL) && res)
 		ksft_print_msg("Intel MBM may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
-	mbm_test_cleanup();
 }
 
 static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
@@ -107,7 +106,6 @@ static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
 		sprintf(benchmark_cmd[1], "%d", span);
 	res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
 	ksft_test_result(!res, "MBA: schemata change\n");
-	mba_test_cleanup();
 }
 
 static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
@@ -126,7 +124,6 @@ static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
 	ksft_test_result(!res, "CMT: test\n");
 	if ((get_vendor() == ARCH_INTEL) && res)
 		ksft_print_msg("Intel CMT may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
-	cmt_test_cleanup();
 }
 
 static void run_cat_test(int cpu_no, int no_of_bits)
@@ -142,7 +139,6 @@ static void run_cat_test(int cpu_no, int no_of_bits)
 
 	res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
 	ksft_test_result(!res, "CAT: test\n");
-	cat_test_cleanup();
 }
 
 int main(int argc, char **argv)