[dpdk-stable] [PATCH 05/20] net/ena/base: fix release of wait event

[Michal Krawczyk]

The wait event is being accessed without making sure it the completion
context exists. The check for that is just below, so it could be used
for releasing wait even safely.

Fixes: 3adcba9a8987 ("net/ena: update HAL to the newer version")
Cc: stable at dpdk.org

Signed-off-by: Michal Krawczyk <mk at semihalf.com>
Reviewed-by: Igor Chauskin <igorch at amazon.com>
Reviewed-by: Guy Tzalik <gtzalik at amazon.com>
---
 drivers/net/ena/base/ena_com.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ena/base/ena_com.c b/drivers/net/ena/base/ena_com.c
index b4e54318c6..ce239ab164 100644
--- a/drivers/net/ena/base/ena_com.c
+++ b/drivers/net/ena/base/ena_com.c
@@ -1655,11 +1655,13 @@ void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
 	struct ena_com_aenq *aenq = &ena_dev->aenq;
 	u16 size;
 
-	ENA_WAIT_EVENT_DESTROY(admin_queue->comp_ctx->wait_event);
-	if (admin_queue->comp_ctx)
+	if (admin_queue->comp_ctx) {
+		ENA_WAIT_EVENT_DESTROY(admin_queue->comp_ctx->wait_event);
 		ENA_MEM_FREE(ena_dev->dmadev,
 			     admin_queue->comp_ctx,
 			     (admin_queue->q_depth * sizeof(struct ena_comp_ctx)));
+	}
+
 	admin_queue->comp_ctx = NULL;
 	size = ADMIN_SQ_SIZE(admin_queue->q_depth);
 	if (sq->entries)
-- 
2.25.1