[PATCH v2] app/testpmd: fix pmd_test_exit function for vdevs

[zhiyong.yang@intel.com]

For vdev, just calling rte_eth_dev_close() isn't enough to free all
the resources allocated during device probe, e.g. for virtio-user,
virtio_user_pmd_remove(), i.e. the remove() method of a vdev driver,
needs to be called to unlink the socket file created during device
probe. So this patch calls the rte_eth_dev_detach() for vdev when
quitting testpmd.

Cc: maxime.coquelin@redhat.com
Cc: ferruh.yigit@intel.com
Cc: tiwei.bie@intel.com
Cc: lei.a.yao@intel.com
Cc: bernard.iremonger@intel.com
Cc: stable@dpdk.org

Fixes: af75078fece3 ("first public release")
Fixes: bd8f50a45d0f ("net/virtio-user: support server mode")

Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
---

changes in V2:
1. change the pache title and add a fixes line.

 app/test-pmd/testpmd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 134401603..1d308f056 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2011,6 +2011,8 @@ detach_port(portid_t port_id)
 void
 pmd_test_exit(void)
 {
+	const struct rte_bus *bus;
+	struct rte_device *device;
 	portid_t pt_id;
 	int ret;
 
@@ -2020,10 +2022,14 @@ pmd_test_exit(void)
 	if (ports != NULL) {
 		no_link_check = 1;
 		RTE_ETH_FOREACH_DEV(pt_id) {
+			device = rte_eth_devices[pt_id].device;
+			bus = rte_bus_find_by_device(device);
 			printf("\nShutting down port %d...\n", pt_id);
 			fflush(stdout);
 			stop_port(pt_id);
 			close_port(pt_id);
+			if (bus && !strcmp(bus->name, "vdev"))
+				detach_port(pt_id);
 		}
 	}
 
-- 
2.14.3