[dpdk-dev] [PATCH] event/sw: fix credit return on invalid queue id

[Harry van Haaren <harry.van.haaren@intel.com>]

This patch returns a credit when an rte_event is
enqueued with an invalid queue_id. Previously a
credit was leaked from the system.

Note that the eventdev instance does not attempt
to free any resources that the rte_event owns. As
a result, resources owned by the rte_event are leaked.
Eg. if the rte_event represents an rte_mbuf, the mbuf
will not be freed, and causes a leak from the mempool.

Fixes: 656af9180014 ("event/sw: add worker core functions")

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
---
 drivers/event/sw/sw_evdev_worker.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/event/sw/sw_evdev_worker.c b/drivers/event/sw/sw_evdev_worker.c
index b9b6f8d..9cb6bef 100644
--- a/drivers/event/sw/sw_evdev_worker.c
+++ b/drivers/event/sw/sw_evdev_worker.c
@@ -105,9 +105,12 @@ sw_event_enqueue_burst(void *port, const struct rte_event ev[], uint16_t num)
 		 */
 		if ((new_ops[i] & QE_FLAG_COMPLETE) && outstanding)
 			p->outstanding_releases--;
-		/* Branch to avoid touching p->stats except error case */
-		if (unlikely(invalid_qid))
+
+		/* error case: branch to avoid touching p->stats */
+		if (unlikely(invalid_qid)) {
 			p->stats.rx_dropped++;
+			p->inflight_credits++;
+		}
 	}
 
 	/* returns number of events actually enqueued */
-- 
2.7.4