[dpdk-dev] [PATCH v2] service: fix service lcore stop function

[Guduri Prathyusha]

lcore_states store the state of the lcore. Fixing the invalid
dereference of lcore_states with service number

Unit test case service_lcore_start_stop fails with the above fix.
Service core was stopped without stopping the service.

This commit fixes the test by adding negative and positive cases of
stopping the service lcore before and after stopping the service
respectively

Fixes: 21698354c832 ("service: introduce service cores concept")
Fixes: f038a81e1c56 ("service: add unit tests")

Signed-off-by: Guduri Prathyusha <gprathyusha at caviumnetworks.com>
---

This patch is based on [1]

v2 changes:
- Combined Patch 1/2 and 2/2 of v1
- Rebased to the future service core patches [1]

[1] http://dpdk.org/dev/patchwork/patch/27684/
---
 lib/librte_eal/common/rte_service.c | 4 ++--
 test/test/test_service_cores.c      | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/common/rte_service.c b/lib/librte_eal/common/rte_service.c
index e7ed597d2..ae9a5263a 100644
--- a/lib/librte_eal/common/rte_service.c
+++ b/lib/librte_eal/common/rte_service.c
@@ -612,9 +612,9 @@ rte_service_lcore_stop(uint32_t lcore)
 		return -EALREADY;
 
 	uint32_t i;
+	uint64_t service_mask = lcore_states[lcore].service_mask;
 	for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
-		int32_t enabled =
-			lcore_states[i].service_mask & (UINT64_C(1) << i);
+		int32_t enabled = service_mask & (UINT64_C(1) << i);
 		int32_t service_running = rte_service_runstate_get(i);
 		int32_t only_core = rte_services[i].num_mapped_cores == 1;
 
diff --git a/test/test/test_service_cores.c b/test/test/test_service_cores.c
index ddea7f0ba..ee8313ef6 100644
--- a/test/test/test_service_cores.c
+++ b/test/test/test_service_cores.c
@@ -576,6 +576,10 @@ service_lcore_start_stop(void)
 			"Service core expected to poll service but it didn't");
 
 	/* core stop */
+	TEST_ASSERT_EQUAL(-EBUSY, rte_service_lcore_stop(slcore_id),
+			"Service core running a service should return -EBUSY");
+	TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 0),
+			"Stopping valid service failed");
 	TEST_ASSERT_EQUAL(-EINVAL, rte_service_lcore_stop(100000),
 			"Invalid Service core stop should return -EINVAL");
 	TEST_ASSERT_EQUAL(0, rte_service_lcore_stop(slcore_id),
-- 
2.14.1