[dpdk-stable] [PATCH v5] lib/efd: fix to free tail queue entry after use

[Hari Kumar Vemula <hari.kumarx.vemula@intel.com>]

In rte_efd_create() allocated memory for tail queue entry but
not freed.
Added freeing the tail queue entry.

Fixes: 56b6ef874f80 ("efd: new Elastic Flow Distributor library")
Cc: stable@dpdk.org

Signed-off-by: Hari Kumar Vemula <hari.kumarx.vemula@intel.com>
Reviewed-by: Honnappa Nagarahalli <Honnappa.nagarahalli@arm.com>
Acked-by: Reshma Pattan <reshma.pattan@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---
v5: Removed NULL initialization
v4: RTE_TAILQ_CAST moved after for loop
v3: Replaced TAILQ_FOREACH_SAFE with TAILQ_FOREACH
v2: Updated commit message.
---
 lib/librte_efd/rte_efd.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/librte_efd/rte_efd.c b/lib/librte_efd/rte_efd.c
index e6e5cfda2..1a97ece05 100644
--- a/lib/librte_efd/rte_efd.c
+++ b/lib/librte_efd/rte_efd.c
@@ -740,6 +740,8 @@ void
 rte_efd_free(struct rte_efd_table *table)
 {
 	uint8_t socket_id;
+	struct rte_efd_list *efd_list;
+	struct rte_tailq_entry *te, *temp;
 
 	if (table == NULL)
 		return;
@@ -747,6 +749,18 @@ rte_efd_free(struct rte_efd_table *table)
 	for (socket_id = 0; socket_id < RTE_MAX_NUMA_NODES; socket_id++)
 		rte_free(table->chunks[socket_id]);
 
+	efd_list = RTE_TAILQ_CAST(rte_efd_tailq.head, rte_efd_list);
+	rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
+
+	TAILQ_FOREACH_SAFE(te, efd_list, next, temp) {
+		if (te->data == (void *) table) {
+			TAILQ_REMOVE(efd_list, te, next);
+			rte_free(te);
+			break;
+		}
+	}
+
+	rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
 	rte_ring_free(table->free_slots);
 	rte_free(table->offline_chunks);
 	rte_free(table->keys);
-- 
2.17.2