examples/vm_power: add check for port count

If we don't pass any ports to the app, we don't need to create
any mempools, and we don't need to init any ports.

Signed-off-by: David Hunt <david.hunt@intel.com>
Acked-by: Radu Nicolau <radu.nicolau@intel.com>

diff --git a/examples/vm_power_manager/main.c b/examples/vm_power_manager/main.c
index 8911f26..0d38469 100644 (file)
--- a/examples/vm_power_manager/main.c
+++ b/examples/vm_power_manager/main.c
@@ -278,51 +278,56 @@ main(int argc, char **argv)
 
        nb_ports = rte_eth_dev_count_avail();
 
-       mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
-               MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+       if (nb_ports > 0) {
+               mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
+                               NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
+                               RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 
-       if (mbuf_pool == NULL)
-               rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
+               if (mbuf_pool == NULL)
+                       rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 
-       /* Initialize ports. */
-       RTE_ETH_FOREACH_DEV(portid) {
-               struct ether_addr eth;
-               int w, j;
-               int ret;
+               /* Initialize ports. */
+               RTE_ETH_FOREACH_DEV(portid) {
+                       struct ether_addr eth;
+                       int w, j;
+                       int ret;
 
-               if ((enabled_port_mask & (1 << portid)) == 0)
-                       continue;
+                       if ((enabled_port_mask & (1 << portid)) == 0)
+                               continue;
 
-               eth.addr_bytes[0] = 0xe0;
-               eth.addr_bytes[1] = 0xe0;
-               eth.addr_bytes[2] = 0xe0;
-               eth.addr_bytes[3] = 0xe0;
-               eth.addr_bytes[4] = portid + 0xf0;
+                       eth.addr_bytes[0] = 0xe0;
+                       eth.addr_bytes[1] = 0xe0;
+                       eth.addr_bytes[2] = 0xe0;
+                       eth.addr_bytes[3] = 0xe0;
+                       eth.addr_bytes[4] = portid + 0xf0;
 
-               if (port_init(portid, mbuf_pool) != 0)
-                       rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8 "\n",
+                       if (port_init(portid, mbuf_pool) != 0)
+                               rte_exit(EXIT_FAILURE,
+                                       "Cannot init port %"PRIu8 "\n",
                                        portid);
 
-               for (w = 0; w < MAX_VFS; w++) {
-                       eth.addr_bytes[5] = w + 0xf0;
-
-                       ret = rte_pmd_ixgbe_set_vf_mac_addr(portid,
-                                               w, &eth);
-                       if (ret == -ENOTSUP)
-                               ret = rte_pmd_i40e_set_vf_mac_addr(portid,
-                                               w, &eth);
-                       if (ret == -ENOTSUP)
-                               ret = rte_pmd_bnxt_set_vf_mac_addr(portid,
-                                               w, &eth);
-
-                       switch (ret) {
-                       case 0:
-                               printf("Port %d VF %d MAC: ",
-                                               portid, w);
-                               for (j = 0; j < 6; j++) {
-                                       printf("%02x", eth.addr_bytes[j]);
-                                       if (j < 5)
-                                               printf(":");
+                       for (w = 0; w < MAX_VFS; w++) {
+                               eth.addr_bytes[5] = w + 0xf0;
+
+                               ret = rte_pmd_ixgbe_set_vf_mac_addr(portid,
+                                                       w, &eth);
+                               if (ret == -ENOTSUP)
+                                       ret = rte_pmd_i40e_set_vf_mac_addr(
+                                                       portid, w, &eth);
+                               if (ret == -ENOTSUP)
+                                       ret = rte_pmd_bnxt_set_vf_mac_addr(
+                                                       portid, w, &eth);
+
+                               switch (ret) {
+                               case 0:
+                                       printf("Port %d VF %d MAC: ",
+                                                       portid, w);
+                                       for (j = 0; j < 5; j++) {
+                                               printf("%02x:",
+                                                       eth.addr_bytes[j]);
+                                       }
+                                       printf("%02x\n", eth.addr_bytes[5]);
+                                       break;
                                }
                                printf("\n");
                                break;