diff --git a/test/test/test_pmd_ring.c b/test/test/test_pmd_ring.c
index 19d7d20..f332df9 100644
--- a/test/test/test_pmd_ring.c
+++ b/test/test/test_pmd_ring.c
@@ -7,15 +7,16 @@
 
 #include <rte_eth_ring.h>
 #include <rte_ethdev.h>
-
-static struct rte_mempool *mp;
-static int tx_porta, rx_portb, rxtx_portc, rxtx_portd, rxtx_porte;
+#include <rte_bus_vdev.h>
 
 #define SOCKET0 0
 #define RING_SIZE 256
 #define NUM_RINGS 2
 #define NB_MBUF 512
+#define NUM_PORTS 5
 
+static struct rte_mempool *mp;
+static int ports[NUM_PORTS];
 
 static int
 test_ethdev_configure_port(int port)
@@ -64,18 +65,19 @@ test_send_basic_packets(void)
 	struct rte_mbuf *pbufs[RING_SIZE];
 	int i;
 
-	printf("Testing send and receive RING_SIZE/2 packets (tx_porta -> rx_portb)\n");
+	printf("Testing send and receive RING_SIZE/2 "
+			"packets (ports[0] -> ports[1])\n");
 
 	for (i = 0; i < RING_SIZE/2; i++)
 		pbufs[i] = &bufs[i];
 
-	if (rte_eth_tx_burst(tx_porta, 0, pbufs, RING_SIZE/2) < RING_SIZE/2) {
-		printf("Failed to transmit packet burst port %d\n", tx_porta);
+	if (rte_eth_tx_burst(ports[0], 0, pbufs, RING_SIZE/2) < RING_SIZE/2) {
+		printf("Failed to transmit packet burst port %d\n", ports[0]);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(rx_portb, 0, pbufs, RING_SIZE) != RING_SIZE/2) {
-		printf("Failed to receive packet burst on port %d\n", rx_portb);
+	if (rte_eth_rx_burst(ports[1], 0, pbufs, RING_SIZE) != RING_SIZE/2) {
+		printf("Failed to receive packet burst on port %d\n", ports[1]);
 		return -1;
 	}
 
@@ -95,7 +97,8 @@ test_send_basic_packets_port(int port)
 	struct rte_mbuf *pbufs[RING_SIZE];
 	int i;
 
-	printf("Testing send and receive RING_SIZE/2 packets (cmdl_port0 -> cmdl_port0)\n");
+	printf("Testing send and receive RING_SIZE/2 packets"
+			"(cmdl_port0 -> cmdl_port0)\n");
 
 	for (i = 0; i < RING_SIZE/2; i++)
 		pbufs[i] = &bufs[i];
@@ -232,8 +235,10 @@ test_pmd_ring_pair_create_attach(int portd, int porte)
 		return -1;
 	}
 
-	if ((rte_eth_rx_queue_setup(portd, 0, RING_SIZE, SOCKET0, NULL, mp) < 0)
-		|| (rte_eth_rx_queue_setup(porte, 0, RING_SIZE, SOCKET0, NULL, mp) < 0)) {
+	if ((rte_eth_rx_queue_setup(portd, 0, RING_SIZE,
+					SOCKET0, NULL, mp) < 0)
+		|| (rte_eth_rx_queue_setup(porte, 0, RING_SIZE,
+					SOCKET0, NULL, mp) < 0)) {
 		printf("RX queue setup failed\n");
 		return -1;
 	}
@@ -388,9 +393,6 @@ test_pmd_ring_pair_create_attach(int portd, int porte)
 		return -1;
 	}
 
-	rte_eth_dev_stop(portd);
-	rte_eth_dev_stop(porte);
-
 	return 0;
 }
 
@@ -400,6 +402,7 @@ test_pmd_ring(void)
 	struct rte_ring *rxtx[NUM_RINGS];
 	int port, cmdl_port0 = -1;
 	uint8_t nb_ports;
+	char port_name[RTE_ETH_NAME_MAX_LEN];
 
 	nb_ports = rte_eth_dev_count_avail();
 	printf("nb_ports=%d\n", (int)nb_ports);
@@ -409,29 +412,36 @@ test_pmd_ring(void)
 	 *
 	 *  Test with the command line option --vdev=net_ring0 to test rte_pmd_ring_devinit.
 	 */
-	rxtx[0] = rte_ring_create("R0", RING_SIZE, SOCKET0, RING_F_SP_ENQ|RING_F_SC_DEQ);
+	rxtx[0] = rte_ring_create("R0", RING_SIZE, SOCKET0,
+			RING_F_SP_ENQ|RING_F_SC_DEQ);
 	if (rxtx[0] == NULL) {
 		printf("rte_ring_create R0 failed");
 		return -1;
 	}
 
-	rxtx[1] = rte_ring_create("R1", RING_SIZE, SOCKET0, RING_F_SP_ENQ|RING_F_SC_DEQ);
+	rxtx[1] = rte_ring_create("R1", RING_SIZE, SOCKET0,
+			RING_F_SP_ENQ|RING_F_SC_DEQ);
 	if (rxtx[1] == NULL) {
 		printf("rte_ring_create R1 failed");
 		return -1;
 	}
 
-	tx_porta = rte_eth_from_rings("net_ringa", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
-	rx_portb = rte_eth_from_rings("net_ringb", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
-	rxtx_portc = rte_eth_from_rings("net_ringc", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
-	rxtx_portd = rte_eth_from_rings("net_ringd", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
-	rxtx_porte = rte_eth_from_rings("net_ringe", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	ports[0] = rte_eth_from_rings("net_ringa", rxtx,
+			NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	ports[1] = rte_eth_from_rings("net_ringb", rxtx,
+			NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	ports[2] = rte_eth_from_rings("net_ringc", rxtx,
+			NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	ports[3] = rte_eth_from_rings("net_ringd", rxtx,
+			NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	ports[4] = rte_eth_from_rings("net_ringe", rxtx,
+			NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
 
-	printf("tx_porta=%d rx_portb=%d rxtx_portc=%d rxtx_portd=%d rxtx_porte=%d\n",
-			tx_porta, rx_portb, rxtx_portc, rxtx_portd, rxtx_porte);
+	printf("ports[0]=%d ports[1]=%d ports[2]=%d ports[3]=%d ports[4]=%d\n",
+			ports[0], ports[1], ports[2], ports[3], ports[4]);
 
-	if ((tx_porta == -1) || (rx_portb == -1) || (rxtx_portc == -1)
-		|| (rxtx_portd == -1) || (rxtx_porte == -1)) {
+	if ((ports[0] == -1) || (ports[1] == -1) || (ports[2] == -1)
+		|| (ports[3] == -1) || (ports[4] == -1)) {
 		printf("rte_eth_from rings failed\n");
 		return -1;
 	}
@@ -441,37 +451,35 @@ test_pmd_ring(void)
 	if (mp == NULL)
 		return -1;
 
-	if ((tx_porta >= RTE_MAX_ETHPORTS) || (rx_portb >= RTE_MAX_ETHPORTS)
-		|| (rxtx_portc >= RTE_MAX_ETHPORTS)
-		|| (rxtx_portd >= RTE_MAX_ETHPORTS)
-		|| (rxtx_porte >= RTE_MAX_ETHPORTS)) {
+	if ((ports[0] >= RTE_MAX_ETHPORTS)
+		|| (ports[1] >= RTE_MAX_ETHPORTS)
+		|| (ports[2] >= RTE_MAX_ETHPORTS)
+		|| (ports[3] >= RTE_MAX_ETHPORTS)
+		|| (ports[4] >= RTE_MAX_ETHPORTS)) {
 		printf(" port exceed max eth ports\n");
 		return -1;
 	}
 
-	if (test_ethdev_configure_port(tx_porta) < 0)
+	if (test_ethdev_configure_port(ports[0]) < 0)
 		return -1;
 
-	if (test_ethdev_configure_port(rx_portb) < 0)
+	if (test_ethdev_configure_port(ports[1]) < 0)
 		return -1;
 
-	if (test_ethdev_configure_port(rxtx_portc) < 0)
+	if (test_ethdev_configure_port(ports[2]) < 0)
 		return -1;
 
 	if (test_send_basic_packets() < 0)
 		return -1;
 
-	if (test_get_stats(rxtx_portc) < 0)
+	if (test_get_stats(ports[2]) < 0)
 		return -1;
 
-	if (test_stats_reset(rxtx_portc) < 0)
+	if (test_stats_reset(ports[2]) < 0)
 		return -1;
 
-	rte_eth_dev_stop(tx_porta);
-	rte_eth_dev_stop(rx_portb);
-	rte_eth_dev_stop(rxtx_portc);
 
-	if (test_pmd_ring_pair_create_attach(rxtx_portd, rxtx_porte) < 0)
+	if (test_pmd_ring_pair_create_attach(ports[3], ports[4]) < 0)
 		return -1;
 
 	/* find a port created with the --vdev=net_ring0 command line option */
@@ -495,7 +503,23 @@ test_pmd_ring(void)
 		if (test_get_stats(cmdl_port0) < 0)
 			return -1;
 		rte_eth_dev_stop(cmdl_port0);
+		rte_eth_dev_get_name_by_port(cmdl_port0, port_name);
+		rte_vdev_uninit(port_name);
 	}
+
+	/* release ports and rings resources */
+	if (mp != NULL)
+		rte_mempool_free(mp);
+
+	for (int i = 0; i < NUM_PORTS; i++) {
+		rte_eth_dev_stop(ports[i]);
+		rte_eth_dev_get_name_by_port(ports[i], port_name);
+		rte_vdev_uninit(port_name);
+	}
+
+	for (int i = 0; i < NUM_RINGS; i++)
+		rte_ring_free(rxtx[i]);
+
 	return 0;
 }
 
