[PATCH] examples/l3fwd: fix missing unlock issue

[Weiguo Li]

The function l3fwd_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: aaf58cb85b62 ("examples/l3fwd: add event port and queue setup")
Cc: stable at dpdk.org

Signed-off-by: Weiguo Li <liweiguo at xencore.cn>
---
 examples/l3fwd/l3fwd_event.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/examples/l3fwd/l3fwd_event.c b/examples/l3fwd/l3fwd_event.c
index 20be22c6db..40c69baafb 100644
--- a/examples/l3fwd/l3fwd_event.c
+++ b/examples/l3fwd/l3fwd_event.c
@@ -205,6 +205,7 @@ l3fwd_get_free_event_port(struct l3fwd_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