linux-kernel - [PATCH] selftests/resctrl: Fix incorrect error return on test complete

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Date:   Fri, 14 Apr 2023 09:43:58 -0700
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     shuah@...nel.org, skhan@...uxfoundation.org
Cc:     ilpo.jarvinen@...ux.intel.com, tan.shaopeng@...fujitsu.com,
        fenghua.yu@...el.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/resctrl: Fix incorrect error return on test complete

An error snuck in between two recent conflicting changes:
Until recently ->setup() used negative values to indicate
normal test termination. This was changed in
commit fa10366cc6f4 ("selftests/resctrl: Allow ->setup() to return
errors") that transitioned ->setup() to use negative values
to indicate errors and a new END_OF_TESTS to indicate normal
termination.

commit 42e3b093eb7c ("selftests/resctrl: Fix set up schemata with 100%
allocation on first run in MBM test") continued to use
negative return to indicate normal test termination.

Fix mbm_setup() to use the new END_OF_TESTS to indicate
error-free test termination.

Fixes: 42e3b093eb7c ("selftests/resctrl: Fix set up schemata with 100% allocation on first run in MBM test")
Reported-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Link: https://lore.kernel.org/lkml/bb65cce8-54d7-68c5-ef19-3364ec95392a@linux.intel.com/
Signed-off-by: Reinette Chatre <reinette.chatre@...el.com>
---
Hi Shuah,

Apologies, this error snuck in between the two series
merged into kselftest's next this week.

 tools/testing/selftests/resctrl/mbm_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index 146132fa986d..538d35a6485a 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -98,7 +98,7 @@ static int mbm_setup(int num, ...)

 	/* Run NUM_OF_RUNS times */
 	if (p->num_of_runs >= NUM_OF_RUNS)
-		return -1;
+		return END_OF_TESTS;

 	/* Set up shemata with 100% allocation on the first run. */
 	if (p->num_of_runs == 0)
-- 
2.34.1