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

[Michal Krawczyk <mk@semihalf.com>]

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@dpdk.org

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@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