VPP-189 Fix coverity warnings

Change-Id: Iea6d338e60a95f7f30c10c2e751d4827e816f700
Signed-off-by: Dave Barach <dave@barachs.net>

7 files changed, 51 insertions, 23 deletions

diff --git a/vnet/vnet/devices/dpdk/cli.c b/vnet/vnet/devices/dpdk/cli.c
index c449eebd0a3..a40dcc7c9ad 100644
--- a/vnet/vnet/devices/dpdk/cli.c
+++ b/vnet/vnet/devices/dpdk/cli.c
@@ -332,7 +332,7 @@ show_efd (vlib_main_t * vm,
         dpdk_device_t * xd;
         u32 device_id = ~0;
 
-        unformat(input, "device %d", &device_id);
+        (void) unformat(input, "device %d", &device_id);
         vec_foreach (xd, dm->devices) {
             if ((xd->device_index == device_id) || (device_id == ~0)) {
                 show_dpdk_device_stats(vm, xd);
diff --git a/vnet/vnet/devices/dpdk/device.c b/vnet/vnet/devices/dpdk/device.c
index 66d4b6d4eed..61774f0f3e2 100644
--- a/vnet/vnet/devices/dpdk/device.c
+++ b/vnet/vnet/devices/dpdk/device.c
@@ -1028,7 +1028,11 @@ dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
       else
       {
         xd->admin_up = 0;
-        rte_kni_release(xd->kni);
+        int kni_rv;
+
+        kni_rv = rte_kni_release(xd->kni);
+        if (kni_rv < 0)
+          clib_warning ("rte_kni_release returned %d", kni_rv);
       }
       return 0;
   }
diff --git a/vnet/vnet/devices/dpdk/format.c b/vnet/vnet/devices/dpdk/format.c
index 4c553655db6..2d41221d247 100644
--- a/vnet/vnet/devices/dpdk/format.c
+++ b/vnet/vnet/devices/dpdk/format.c
@@ -400,9 +400,12 @@ u8 * format_dpdk_device (u8 * s, va_list * args)
       struct rte_pci_device * pci;
       struct rte_eth_rss_conf rss_conf;
       int vlan_off;
+      int retval;
 
       rss_conf.rss_key = 0;
-      rte_eth_dev_rss_hash_conf_get(xd->device_index, &rss_conf);
+      retval = rte_eth_dev_rss_hash_conf_get(xd->device_index, &rss_conf);
+      if (retval < 0)
+          clib_warning ("rte_eth_dev_rss_hash_conf_get returned %d", retval);
       pci = di.pci_dev;
 
       if (pci)
diff --git a/vnet/vnet/devices/dpdk/init.c b/vnet/vnet/devices/dpdk/init.c
index 1f4629dafc6..b690dec2732 100644
--- a/vnet/vnet/devices/dpdk/init.c
+++ b/vnet/vnet/devices/dpdk/init.c
@@ -119,7 +119,11 @@ dpdk_port_setup (dpdk_main_t * dm, dpdk_device_t * xd)
     }
 
   if (xd->admin_up) {
-    rte_eth_dev_start (xd->device_index);
+      int rv;
+      rv = rte_eth_dev_start (xd->device_index);
+      if (rv < 0)
+        clib_warning ("rte_eth_dev_start %d returned %d",
+                      xd->device_index, rv);
   }
   return 0;
 }
@@ -189,7 +193,12 @@ static u32 dpdk_flag_change (vnet_main_t * vnm,
           rte_eth_dev_set_mtu(xd->device_index, hi->max_packet_bytes);
 
 	  if (xd->admin_up)
-	    rte_eth_dev_start (xd->device_index);
+            {
+              int rv = rte_eth_dev_start (xd->device_index);
+              if (rv < 0)
+                clib_warning ("rte_eth_dev_start %d returned %d",
+                              xd->device_index, rv);
+            }
 	}
     }
   return old;
@@ -391,7 +400,8 @@ dpdk_lib_init (dpdk_main_t * dm)
       if (!xd->pmd) {
 
 
-#define _(s,f) else if (!strcmp(dev_info.driver_name, s)) \
+#define _(s,f) else if (dev_info.driver_name &&                 \
+                        !strcmp(dev_info.driver_name, s))       \
                  xd->pmd = VNET_DPDK_PMD_##f;
         if (0)
           ;
@@ -651,7 +661,7 @@ dpdk_lib_init (dpdk_main_t * dm)
 
       rv = dpdk_port_setup(dm, xd);
 
-      if (rv < 0)
+      if (rv)
         return rv;
 
       /* count the number of descriptors used for this device */
@@ -1199,6 +1209,12 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input)
 	  vec_free(p);
 	  vec_free(path);
       }));
+
+      if (mem_by_socket == 0)
+        {
+          error = clib_error_return (0, "mem_by_socket NULL");
+          goto done;
+        }
       _vec_len (mem_by_socket) = c + 1;
 
       /* regenerate socket_mem string */
diff --git a/vnet/vnet/devices/netmap/device.c b/vnet/vnet/devices/netmap/device.c
index a13326035de..751caf72aa8 100644
--- a/vnet/vnet/devices/netmap/device.c
+++ b/vnet/vnet/devices/netmap/device.c
@@ -119,14 +119,15 @@ netmap_interface_tx (vlib_main_t * vm,
 
       if (nm_tx_pending(ring))
         {
-         ioctl(nif->fd, NIOCTXSYNC, NULL);
-         clib_cpu_time_wait(time_constant);
-
-         if (nm_tx_pending(ring) && !n_free_slots)
-           {
-             cur_ring++;
-             continue;
-           }
+          if (ioctl(nif->fd, NIOCTXSYNC, NULL) < 0)
+            clib_unix_warning ("NIOCTXSYNC");
+          clib_cpu_time_wait(time_constant);
+          
+          if (nm_tx_pending(ring) && !n_free_slots)
+            {
+              cur_ring++;
+              continue;
+            }
         }
 
       while (n_left && n_free_slots)
diff --git a/vnet/vnet/devices/netmap/node.c b/vnet/vnet/devices/netmap/node.c
index 9378dfd95bb..4a79fe0f979 100644
--- a/vnet/vnet/devices/netmap/node.c
+++ b/vnet/vnet/devices/netmap/node.c
@@ -210,13 +210,17 @@ netmap_device_input_fn  (vlib_main_t * vm, vlib_node_runtime_t * node,
 	      VLIB_BUFFER_TRACE_TRAJECTORY_INIT(first_b0);
 	      if (PREDICT_FALSE(n_trace > 0))
 	        {
-	          netmap_input_trace_t *tr;
-	          vlib_trace_buffer (vm, node, next0, first_b0, /* follow_chain */ 0);
-	          vlib_set_trace_count (vm, node, --n_trace);
-	          tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
-	          tr->next_index = next0;
-		  tr->hw_if_index = nif->hw_if_index;
-		  memcpy (&tr->slot, slot, sizeof (struct netmap_slot));
+                  if (PREDICT_TRUE(first_b0 != 0))
+                    {
+                      netmap_input_trace_t *tr;
+                      vlib_trace_buffer (vm, node, next0, first_b0, 
+                                         /* follow_chain */ 0);
+                      vlib_set_trace_count (vm, node, --n_trace);
+                      tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+                      tr->next_index = next0;
+                      tr->hw_if_index = nif->hw_if_index;
+                      memcpy (&tr->slot, slot, sizeof (struct netmap_slot));
+                    }
 	        }
 	      /* enque and take next packet */
 	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
diff --git a/vnet/vnet/l2/l2_input_acl.c b/vnet/vnet/l2/l2_input_acl.c
index d3038e8df1e..f8e77d7e58f 100644
--- a/vnet/vnet/l2/l2_input_acl.c
+++ b/vnet/vnet/l2/l2_input_acl.c
@@ -329,7 +329,7 @@ l2_inacl_node_fn (vlib_main_t * vm,
               t->sw_if_index = vnet_buffer(b0)->sw_if_index[VLIB_RX];
               t->next_index = next0;
               t->table_index = t0 ? t0 - vcm->tables : ~0;
-              t->offset = e0 ? vnet_classify_get_offset (t0, e0): ~0;
+              t->offset = (t0 && e0) ? vnet_classify_get_offset (t0, e0): ~0;
             }
 
           /* verify speculative enqueue, maybe switch current next frame */