linux-kernel - [PATCH 5.18 071/181] perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check

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Message-Id: <20220627111946.622947848@linuxfoundation.org>
Date:   Mon, 27 Jun 2022 13:20:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Richter <tmricht@...ux.ibm.com>,
        Athira Jajeev <atrajeev@...ux.vnet.ibm.com>,
        Ian Rogers <irogers@...gle.com>,
        Disha Goel <disgoel@...ux.vnet.ibm.com>,
        Jiri Olsa <jolsa@...nel.org>, Kajol Jain <kjain@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nageswara R Sastry <rnsastry@...ux.ibm.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 071/181] perf test topology: Use !strncmp(right platform) to fix guest PPC comparision check

From: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>

[ Upstream commit b236371421df57b93fc49c4b9d0e53bd1aab2b2e ]

commit cfd7092c31aed728 ("perf test session topology: Fix test to skip
the test in guest environment") added check to skip the testcase if the
socket_id can't be fetched from topology info.

But the condition check uses strncmp which should be changed to !strncmp
and to correctly match platform.

Fix this condition check.

Fixes: cfd7092c31aed728 ("perf test session topology: Fix test to skip the test in guest environment")
Reported-by: Thomas Richter <tmricht@...ux.ibm.com>
Signed-off-by: Athira Jajeev <atrajeev@...ux.vnet.ibm.com>
Acked-by: Ian Rogers <irogers@...gle.com>
Cc: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
Cc: Disha Goel <disgoel@...ux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kajol Jain <kjain@...ux.ibm.com>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: Madhavan Srinivasan <maddy@...ux.ibm.com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Nageswara R Sastry <rnsastry@...ux.ibm.com>
Link: https://lore.kernel.org/r/20220610135939.63361-1-atrajeev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/perf/tests/topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c
index d23a9e322ff5..0b4f61b6cc6b 100644
--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -115,7 +115,7 @@ static int check_cpu_topology(char *path, struct perf_cpu_map *map)
 	 * physical_package_id will be set to -1. Hence skip this
 	 * test if physical_package_id returns -1 for cpu from perf_cpu_map.
 	 */
-	if (strncmp(session->header.env.arch, "powerpc", 7)) {
+	if (!strncmp(session->header.env.arch, "ppc64le", 7)) {
 		if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1)
 			return TEST_SKIP;
 	}
-- 
2.35.1