[PATCH v5 27/45] net/sxe2: guard Rx queue event FD free in unregister

[liujie5 at linkdatatechnology.com]

From: Jie Liu <liujie5 at linkdatatechnology.com>

sxe2_rxq_intr_unregister() frees irq_ctxt->rxq_event_fd outside the
rxq_event_fd NULL check. Move the free and NULL assignment inside the
guard so the buffer is only released when it was allocated.

Fixes: 8cebf80f1eda ("net/sxe2: support Rx interrupt")
Cc: stable at dpdk.org
Cc: stephen at networkplumber.org
Signed-off-by: Jie Liu <liujie5 at linkdatatechnology.com>
---
 drivers/net/sxe2/sxe2_irq.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/sxe2/sxe2_irq.c b/drivers/net/sxe2/sxe2_irq.c
index ba764dd5e4..4e5339e24b 100644
--- a/drivers/net/sxe2/sxe2_irq.c
+++ b/drivers/net/sxe2/sxe2_irq.c
@@ -881,12 +881,11 @@ static void sxe2_rxq_intr_unregister(struct rte_eth_dev *dev)
 			(void)sxe2_drv_dev_rxq_irq_set(adapter->cdev, i, &efd, 1);
 			sxe2_rxq_intr_efd_free(irq_ctxt->rxq_event_fd[i]);
 		}
+		rte_free(irq_ctxt->rxq_event_fd);
+		irq_ctxt->rxq_event_fd = NULL;
 	}
-	rte_free(irq_ctxt->rxq_event_fd);
-	irq_ctxt->rxq_event_fd = NULL;
 
 	rte_intr_vec_list_free(intr_handle);
-
 	rte_intr_nb_efd_set(intr_handle, 0);
 	rte_intr_max_intr_set(intr_handle, 0);
 }
-- 
2.52.0