[PATCH v2] mlx5/testpmd: fix crash on quit with avail thresh enabled

[Spike Du <spiked@nvidia.com>]

When testpmd quit with mlx5 avail_thresh enabled, a rte timer handler
delays to reconfigure rx queue to re-arm this event. However at the same
time, testpmd is destroying rx queues.
It's never a valid use case for mlx5 avail_thresh. Before testpmd quit,
user should disable avail_thresh configuration to not handle the events.
This is documented in mlx5 driver guide.

To avoid the crash in such use case, check port status, if it is not
RTE_PORT_STARTED, don't process the avail_thresh event.

Fixes: f41a5092e6ae ("app/testpmd: add host shaper command")
Cc: stable@dpdk.org

Signed-off-by: Spike Du <spiked@nvidia.com>
---
 drivers/net/mlx5/mlx5_testpmd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_testpmd.c b/drivers/net/mlx5/mlx5_testpmd.c
index ed84583..879ea28 100644
--- a/drivers/net/mlx5/mlx5_testpmd.c
+++ b/drivers/net/mlx5/mlx5_testpmd.c
@@ -39,7 +39,15 @@
 	uint16_t port_id = port_rxq_id & 0xffff;
 	uint16_t qid = (port_rxq_id >> 16) & 0xffff;
 	struct rte_eth_rxq_info qinfo;
+	struct rte_port *port;
 
+	port = &ports[port_id];
+	if (port->port_status != RTE_PORT_STARTED) {
+		printf("%s port_status(%d) is incorrect, stop avail_thresh "
+		       "event processing.\n",
+		       __func__, port->port_status);
+		return;
+	}
 	printf("%s disable shaper\n", __func__);
 	if (rte_eth_rx_queue_info_get(port_id, qid, &qinfo)) {
 		printf("rx_queue_info_get returns error\n");
-- 
1.8.3.1