[PATCH] examples/l2fwd-event: fix missing unlock issue

[Weiguo Li]

The function l2fwd_get_free_event_port acquires a lock on
'evt_rsrc->evp.lock' at the beginning. This lock is expected
to be released at the first return statement, when no free
event port is available.

Fixes: 080f57bceca4 ("examples/l2fwd-event: add eventdev main loop")
Cc: stable at dpdk.org

Signed-off-by: Weiguo Li <liweiguo at xencore.cn>
---
 examples/l2fwd-event/l2fwd_event.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/examples/l2fwd-event/l2fwd_event.c b/examples/l2fwd-event/l2fwd_event.c
index 4b5a032e35..842fd816e5 100644
--- a/examples/l2fwd-event/l2fwd_event.c
+++ b/examples/l2fwd-event/l2fwd_event.c
@@ -140,6 +140,7 @@ l2fwd_get_free_event_port(struct l2fwd_event_resources *evt_rsrc)
 
 	rte_spinlock_lock(&evt_rsrc->evp.lock);
 	if (index >= evt_rsrc->evp.nb_ports) {
+		rte_spinlock_unlock(&evt_rsrc->evp.lock);
 		printf("No free event port is available\n");
 		return -1;
 	}
-- 
2.34.1