[PATCH v2 6/6] examples/ipsec-secgw: cleanup worker state before exit

[<pbhagavatula@marvell.com>]

From: Pavan Nikhilesh <pbhagavatula@marvell.com>

Event ports are configured to implicitly release the scheduler contexts
currently held in the next call to rte_event_dequeue_burst().
A worker core might still hold a scheduling context during exit as the
next call to rte_event_dequeue_burst() is never made.
This might lead to deadlock based on the worker exit timing and when
there are very less number of flows.

Add a cleanup function to release any scheduling contexts held by the
worker by using RTE_EVENT_OP_RELEASE.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
---
 examples/ipsec-secgw/ipsec_worker.c | 40 ++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 12 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec_worker.c b/examples/ipsec-secgw/ipsec_worker.c
index 8639426c5c..3df5acf384 100644
--- a/examples/ipsec-secgw/ipsec_worker.c
+++ b/examples/ipsec-secgw/ipsec_worker.c
@@ -749,7 +749,7 @@ ipsec_wrkr_non_burst_int_port_drv_mode(struct eh_event_link_info *links,
 		uint8_t nb_links)
 {
 	struct port_drv_mode_data data[RTE_MAX_ETHPORTS];
-	unsigned int nb_rx = 0;
+	unsigned int nb_rx = 0, nb_tx;
 	struct rte_mbuf *pkt;
 	struct rte_event ev;
 	uint32_t lcore_id;
@@ -847,11 +847,19 @@ ipsec_wrkr_non_burst_int_port_drv_mode(struct eh_event_link_info *links,
 		 * directly enqueued to the adapter and it would be
 		 * internally submitted to the eth device.
 		 */
-		rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
-				links[0].event_port_id,
-				&ev,	/* events */
-				1,	/* nb_events */
-				0	/* flags */);
+		nb_tx = rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
+							 links[0].event_port_id,
+							 &ev, /* events */
+							 1,   /* nb_events */
+							 0 /* flags */);
+		if (!nb_tx)
+			rte_pktmbuf_free(ev.mbuf);
+	}
+
+	if (ev.u64) {
+		ev.op = RTE_EVENT_OP_RELEASE;
+		rte_event_enqueue_burst(links[0].eventdev_id,
+					links[0].event_port_id, &ev, 1);
 	}
 }
 
@@ -864,7 +872,7 @@ ipsec_wrkr_non_burst_int_port_app_mode(struct eh_event_link_info *links,
 		uint8_t nb_links)
 {
 	struct lcore_conf_ev_tx_int_port_wrkr lconf;
-	unsigned int nb_rx = 0;
+	unsigned int nb_rx = 0, nb_tx;
 	struct rte_event ev;
 	uint32_t lcore_id;
 	int32_t socket_id;
@@ -952,11 +960,19 @@ ipsec_wrkr_non_burst_int_port_app_mode(struct eh_event_link_info *links,
 		 * directly enqueued to the adapter and it would be
 		 * internally submitted to the eth device.
 		 */
-		rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
-				links[0].event_port_id,
-				&ev,	/* events */
-				1,	/* nb_events */
-				0	/* flags */);
+		nb_tx = rte_event_eth_tx_adapter_enqueue(links[0].eventdev_id,
+							 links[0].event_port_id,
+							 &ev, /* events */
+							 1,   /* nb_events */
+							 0 /* flags */);
+		if (!nb_tx)
+			rte_pktmbuf_free(ev.mbuf);
+	}
+
+	if (ev.u64) {
+		ev.op = RTE_EVENT_OP_RELEASE;
+		rte_event_enqueue_burst(links[0].eventdev_id,
+					links[0].event_port_id, &ev, 1);
 	}
 }
 
-- 
2.25.1