diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
index e520512b20fa..86f28e310200 100644
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -213,7 +213,7 @@ static int	em_setup_msix(struct adapter *);
 static void	em_free_pci_resources(struct adapter *);
 static void	em_local_timer(void *);
 static void	em_reset(struct adapter *);
-static void	em_setup_interface(device_t, struct adapter *);
+static int	em_setup_interface(device_t, struct adapter *);
 
 static void	em_setup_transmit_structures(struct adapter *);
 static void	em_initialize_transmit_unit(struct adapter *);
@@ -628,7 +628,8 @@ em_attach(device_t dev)
 	em_get_wakeup(dev);
 
 	/* Setup OS specific network interface */
-	em_setup_interface(dev, adapter);
+	if (em_setup_interface(dev, adapter) != 0)
+		goto err_late;
 
 	em_reset(adapter);
 
@@ -669,6 +670,8 @@ em_attach(device_t dev)
 	em_free_transmit_structures(adapter);
 	em_free_receive_structures(adapter);
 	em_release_hw_control(adapter);
+	if (adapter->ifp != NULL)
+		if_free(adapter->ifp);
 err_pci:
 	em_free_pci_resources(adapter);
 	EM_CORE_LOCK_DESTROY(adapter);
@@ -2646,7 +2649,7 @@ em_reset(struct adapter *adapter)
  *  Setup networking device structure and register an interface.
  *
  **********************************************************************/
-static void
+static int
 em_setup_interface(device_t dev, struct adapter *adapter)
 {
 	struct ifnet   *ifp;
@@ -2654,8 +2657,10 @@ em_setup_interface(device_t dev, struct adapter *adapter)
 	INIT_DEBUGOUT("em_setup_interface: begin");
 
 	ifp = adapter->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		panic("%s: can not if_alloc()", device_get_nameunit(dev));
+	if (ifp == NULL) {
+		device_printf(dev, "can not allocate ifnet structure\n");
+		return (-1);
+	}
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	ifp->if_mtu = ETHERMTU;
 	ifp->if_init =  em_init;
@@ -2742,6 +2747,7 @@ em_setup_interface(device_t dev, struct adapter *adapter)
 	}
 	ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
 	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
+	return (0);
 }
 
 
diff --git a/sys/dev/e1000/if_igb.c b/sys/dev/e1000/if_igb.c
index fd8804abde32..d8371af8d8f1 100644
--- a/sys/dev/e1000/if_igb.c
+++ b/sys/dev/e1000/if_igb.c
@@ -178,7 +178,7 @@ static int	igb_setup_msix(struct adapter *);
 static void	igb_free_pci_resources(struct adapter *);
 static void	igb_local_timer(void *);
 static void	igb_reset(struct adapter *);
-static void	igb_setup_interface(device_t, struct adapter *);
+static int	igb_setup_interface(device_t, struct adapter *);
 static int	igb_allocate_queues(struct adapter *);
 static void	igb_configure_queues(struct adapter *);
 
@@ -564,7 +564,8 @@ igb_attach(device_t dev)
 		goto err_late;
 
 	/* Setup OS specific network interface */
-	igb_setup_interface(dev, adapter);
+	if (igb_setup_interface(dev, adapter) != 0)
+		goto err_late;
 
 	/* Now get a good starting state */
 	igb_reset(adapter);
@@ -613,6 +614,8 @@ igb_attach(device_t dev)
 	igb_free_transmit_structures(adapter);
 	igb_free_receive_structures(adapter);
 	igb_release_hw_control(adapter);
+	if (adapter->ifp != NULL)
+		if_free(adapter->ifp);
 err_pci:
 	igb_free_pci_resources(adapter);
 	IGB_CORE_LOCK_DESTROY(adapter);
@@ -2658,7 +2661,7 @@ igb_reset(struct adapter *adapter)
  *  Setup networking device structure and register an interface.
  *
  **********************************************************************/
-static void
+static int
 igb_setup_interface(device_t dev, struct adapter *adapter)
 {
 	struct ifnet   *ifp;
@@ -2666,8 +2669,10 @@ igb_setup_interface(device_t dev, struct adapter *adapter)
 	INIT_DEBUGOUT("igb_setup_interface: begin");
 
 	ifp = adapter->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		panic("%s: can not if_alloc()", device_get_nameunit(dev));
+	if (ifp == NULL) {
+		device_printf(dev, "can not allocate ifnet structure\n");
+		return (-1);
+	}
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	ifp->if_mtu = ETHERMTU;
 	ifp->if_init =  igb_init;
@@ -2744,6 +2749,7 @@ igb_setup_interface(device_t dev, struct adapter *adapter)
 	}
 	ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
 	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
+	return (0);
 }
 
 
diff --git a/sys/dev/e1000/if_lem.c b/sys/dev/e1000/if_lem.c
index 1f03f7b46d29..f5c9e2932a34 100644
--- a/sys/dev/e1000/if_lem.c
+++ b/sys/dev/e1000/if_lem.c
@@ -186,7 +186,7 @@ static int	lem_allocate_irq(struct adapter *adapter);
 static void	lem_free_pci_resources(struct adapter *);
 static void	lem_local_timer(void *);
 static int	lem_hardware_init(struct adapter *);
-static void	lem_setup_interface(device_t, struct adapter *);
+static int	lem_setup_interface(device_t, struct adapter *);
 static void	lem_setup_transmit_structures(struct adapter *);
 static void	lem_initialize_transmit_unit(struct adapter *);
 static int	lem_setup_receive_structures(struct adapter *);
@@ -620,7 +620,8 @@ lem_attach(device_t dev)
 	lem_get_wakeup(dev);
 
 	/* Setup OS specific network interface */
-	lem_setup_interface(dev, adapter);
+	if (lem_setup_interface(dev, adapter) != 0)
+		goto err_rx_struct;
 
 	/* Initialize statistics */
 	lem_update_stats_counters(adapter);
@@ -672,6 +673,8 @@ lem_attach(device_t dev)
 	lem_dma_free(adapter, &adapter->txdma);
 err_tx_desc:
 err_pci:
+	if (adapter->ifp != NULL)
+		if_free(adapter->ifp);
 	lem_free_pci_resources(adapter);
 	EM_TX_LOCK_DESTROY(adapter);
 	EM_RX_LOCK_DESTROY(adapter);
@@ -2388,7 +2391,7 @@ lem_hardware_init(struct adapter *adapter)
  *  Setup networking device structure and register an interface.
  *
  **********************************************************************/
-static void
+static int
 lem_setup_interface(device_t dev, struct adapter *adapter)
 {
 	struct ifnet   *ifp;
@@ -2396,8 +2399,10 @@ lem_setup_interface(device_t dev, struct adapter *adapter)
 	INIT_DEBUGOUT("lem_setup_interface: begin");
 
 	ifp = adapter->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		panic("%s: can not if_alloc()", device_get_nameunit(dev));
+	if (ifp == NULL) {
+		device_printf(dev, "can not allocate ifnet structure\n");
+		return (-1);
+	}
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	ifp->if_mtu = ETHERMTU;
 	ifp->if_init =  lem_init;
@@ -2473,6 +2478,7 @@ lem_setup_interface(device_t dev, struct adapter *adapter)
 	}
 	ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
 	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
+	return (0);
 }
 
 
diff --git a/sys/dev/ixgb/if_ixgb.c b/sys/dev/ixgb/if_ixgb.c
index 990f791dfbd6..edb352f4b778 100644
--- a/sys/dev/ixgb/if_ixgb.c
+++ b/sys/dev/ixgb/if_ixgb.c
@@ -108,7 +108,7 @@ static int      ixgb_allocate_pci_resources(struct adapter *);
 static void     ixgb_free_pci_resources(struct adapter *);
 static void     ixgb_local_timer(void *);
 static int      ixgb_hardware_init(struct adapter *);
-static void     ixgb_setup_interface(device_t, struct adapter *);
+static int      ixgb_setup_interface(device_t, struct adapter *);
 static int      ixgb_setup_transmit_structures(struct adapter *);
 static void     ixgb_initialize_transmit_unit(struct adapter *);
 static int      ixgb_setup_receive_structures(struct adapter *);
@@ -331,7 +331,8 @@ ixgb_attach(device_t dev)
 		goto err_hw_init;
 	}
 	/* Setup OS specific network interface */
-	ixgb_setup_interface(dev, adapter);
+	if (ixgb_setup_interface(dev, adapter) != 0)
+		goto err_hw_init;
 
 	/* Initialize statistics */
 	ixgb_clear_hw_cntrs(&adapter->hw);
@@ -346,6 +347,8 @@ ixgb_attach(device_t dev)
 	ixgb_dma_free(adapter, &adapter->txdma);
 err_tx_desc:
 err_pci:
+	if (adapter->ifp != NULL)
+		if_free(adapter->ifp);
 	ixgb_free_pci_resources(adapter);
 	sysctl_ctx_free(&adapter->sysctl_ctx);
 	return (error);
@@ -1319,15 +1322,17 @@ ixgb_hardware_init(struct adapter * adapter)
  *  Setup networking device structure and register an interface.
  *
  **********************************************************************/
-static void
+static int
 ixgb_setup_interface(device_t dev, struct adapter * adapter)
 {
 	struct ifnet   *ifp;
 	INIT_DEBUGOUT("ixgb_setup_interface: begin");
 
 	ifp = adapter->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		panic("%s: can not if_alloc()\n", device_get_nameunit(dev));
+	if (ifp == NULL) {
+		device_printf(dev, "can not allocate ifnet structure\n");
+		return (-1);
+	}
 #if __FreeBSD_version >= 502000
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 #else
@@ -1379,7 +1384,7 @@ ixgb_setup_interface(device_t dev, struct adapter * adapter)
 	ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
 	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
 
-	return;
+	return (0);
 }
 
 /********************************************************************
diff --git a/sys/dev/ixgbe/ixgbe.c b/sys/dev/ixgbe/ixgbe.c
index c514dc34f13b..e7ecff8c8c89 100644
--- a/sys/dev/ixgbe/ixgbe.c
+++ b/sys/dev/ixgbe/ixgbe.c
@@ -119,7 +119,7 @@ static int	ixgbe_allocate_queues(struct adapter *);
 static int	ixgbe_setup_msix(struct adapter *);
 static void	ixgbe_free_pci_resources(struct adapter *);
 static void     ixgbe_local_timer(void *);
-static void     ixgbe_setup_interface(device_t, struct adapter *);
+static int      ixgbe_setup_interface(device_t, struct adapter *);
 static void     ixgbe_config_link(struct adapter *);
 
 static int      ixgbe_allocate_transmit_buffers(struct tx_ring *);
@@ -586,7 +586,8 @@ ixgbe_attach(device_t dev)
 		goto err_late;
 
 	/* Setup OS specific network interface */
-	ixgbe_setup_interface(dev, adapter);
+	if (ixgbe_setup_interface(dev, adapter) != 0)
+		goto err_late;
 
 	/* Sysctl for limiting the amount of work done in the taskqueue */
 	ixgbe_add_rx_process_limit(adapter, "rx_processing_limit",
@@ -632,6 +633,8 @@ ixgbe_attach(device_t dev)
 	ixgbe_free_transmit_structures(adapter);
 	ixgbe_free_receive_structures(adapter);
 err_out:
+	if (adapter->ifp != NULL)
+		if_free(adapter->ifp);
 	ixgbe_free_pci_resources(adapter);
 	return (error);
 
@@ -2357,7 +2360,7 @@ ixgbe_free_pci_resources(struct adapter * adapter)
  *  Setup networking device structure and register an interface.
  *
  **********************************************************************/
-static void
+static int
 ixgbe_setup_interface(device_t dev, struct adapter *adapter)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
@@ -2366,8 +2369,10 @@ ixgbe_setup_interface(device_t dev, struct adapter *adapter)
 	INIT_DEBUGOUT("ixgbe_setup_interface: begin");
 
 	ifp = adapter->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		panic("%s: can not if_alloc()\n", device_get_nameunit(dev));
+	if (ifp == NULL) {
+		device_printf(dev, "can not allocate ifnet structure\n");
+		return (-1);
+	}
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	ifp->if_mtu = ETHERMTU;
 	ifp->if_baudrate = 1000000000;
@@ -2415,7 +2420,7 @@ ixgbe_setup_interface(device_t dev, struct adapter *adapter)
 	ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
 	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
 
-	return;
+	return (0);
 }
 
 static void