diff --git a/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c b/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c
index cd9de7cc..706b1298 100644
--- a/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -348,15 +348,11 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	/* get numa node */
 	snprintf(filename, sizeof(filename), "%s/numa_node",
 		 dirname);
-	if (access(filename, R_OK) != 0) {
-		/* if no NUMA support, set default to 0 */
-		dev->numa_node = 0;
-	} else {
-		if (eal_parse_sysfs_value(filename, &tmp) < 0) {
-			free(dev);
-			return -1;
-		}
+	if (eal_parse_sysfs_value(filename, &tmp) == 0 &&
+	    tmp < RTE_MAX_NUMA_NODES) {
 		dev->numa_node = tmp;
+	} else {
+		dev->numa_node = 0;
 	}
 
 	/* parse resources */
diff --git a/lib/ff_dpdk_if.c b/lib/ff_dpdk_if.c
index 19e6f3d8..ac54601f 100644
--- a/lib/ff_dpdk_if.c
+++ b/lib/ff_dpdk_if.c
@@ -68,7 +68,7 @@
  * Configurable number of RX/TX ring descriptors
  */
 #define RX_QUEUE_SIZE 512
-#define TX_QUEUE_SIZE 256
+#define TX_QUEUE_SIZE 512
 
 #define MAX_PKT_BURST 32
 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */