[PATCH] test/bitops: check worker lcore availability

[David Marchand <david.marchand@redhat.com>]

Coverity is not able to understand that having 2 lcores means that
rte_get_next_lcore(-1, 0, 1) can't return RTE_MAX_LCORE.
Add an assert.

Coverity issue: 445382, 445383, 445384, 445387, 445389, 445391
Fixes: 35326b61aecb ("bitops: add atomic bit operations in new API")

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
Note: 
- a better fix would be to check lcore id validity in the EAL launch API,
  but it requires inspecting all functions and it could result in some
  API change, so sending this as a simple fix for now,

---
 app/test/test_bitops.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/test/test_bitops.c b/app/test/test_bitops.c
index 4200073ae4..4ed54709fb 100644
--- a/app/test/test_bitops.c
+++ b/app/test/test_bitops.c
@@ -159,6 +159,7 @@ test_bit_atomic_parallel_assign ## size(void) \
 		return TEST_SKIPPED; \
 	} \
 	worker_lcore_id = rte_get_next_lcore(-1, 1, 0); \
+	TEST_ASSERT(worker_lcore_id < RTE_MAX_LCORE, "Failed to find a worker lcore"); \
 	lmain.bit = rte_rand_max(size); \
 	do { \
 		lworker.bit = rte_rand_max(size); \
@@ -218,6 +219,7 @@ test_bit_atomic_parallel_test_and_modify ## size(void) \
 		return TEST_SKIPPED; \
 	} \
 	worker_lcore_id = rte_get_next_lcore(-1, 1, 0); \
+	TEST_ASSERT(worker_lcore_id < RTE_MAX_LCORE, "Failed to find a worker lcore"); \
 	int rc = rte_eal_remote_launch(run_parallel_test_and_modify ## size, &lworker, \
 		worker_lcore_id); \
 	TEST_ASSERT(rc == 0, "Worker thread launch failed"); \
@@ -267,6 +269,7 @@ test_bit_atomic_parallel_flip ## size(void) \
 		return TEST_SKIPPED; \
 	} \
 	worker_lcore_id = rte_get_next_lcore(-1, 1, 0); \
+	TEST_ASSERT(worker_lcore_id < RTE_MAX_LCORE, "Failed to find a worker lcore"); \
 	int rc = rte_eal_remote_launch(run_parallel_flip ## size, &lworker, worker_lcore_id); \
 	TEST_ASSERT(rc == 0, "Worker thread launch failed"); \
 	run_parallel_flip ## size(&lmain); \
-- 
2.46.2