diff --git a/sys/arm/allwinner/if_emac.c b/sys/arm/allwinner/if_emac.c
--- a/sys/arm/allwinner/if_emac.c
+++ b/sys/arm/allwinner/if_emac.c
@@ -940,11 +940,6 @@
 	emac_reset(sc);
 
 	ifp = sc->emac_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "unable to allocate ifp\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 
 	/* Setup MII */
diff --git a/sys/arm/ti/cpsw/if_cpsw.c b/sys/arm/ti/cpsw/if_cpsw.c
--- a/sys/arm/ti/cpsw/if_cpsw.c
+++ b/sys/arm/ti/cpsw/if_cpsw.c
@@ -1025,11 +1025,6 @@
 
 	/* Allocate network interface */
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		cpswp_detach(dev);
-		return (ENXIO);
-	}
-
 	if_initname(ifp, device_get_name(sc->dev), sc->unit);
 	if_setsoftc(ifp, sc);
 	if_setflags(ifp, IFF_SIMPLEX | IFF_MULTICAST | IFF_BROADCAST);
diff --git a/sys/dev/ae/if_ae.c b/sys/dev/ae/if_ae.c
--- a/sys/dev/ae/if_ae.c
+++ b/sys/dev/ae/if_ae.c
@@ -326,12 +326,6 @@
 		goto fail;
 
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "could not allocate ifnet structure.\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/age/if_age.c b/sys/dev/age/if_age.c
--- a/sys/dev/age/if_age.c
+++ b/sys/dev/age/if_age.c
@@ -590,12 +590,6 @@
 	age_get_macaddr(sc);
 
 	ifp = sc->age_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "cannot allocate ifnet structure.\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/alc/if_alc.c b/sys/dev/alc/if_alc.c
--- a/sys/dev/alc/if_alc.c
+++ b/sys/dev/alc/if_alc.c
@@ -1584,12 +1584,6 @@
 	alc_get_macaddr(sc);
 
 	ifp = sc->alc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "cannot allocate ifnet structure.\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/ale/if_ale.c b/sys/dev/ale/if_ale.c
--- a/sys/dev/ale/if_ale.c
+++ b/sys/dev/ale/if_ale.c
@@ -609,12 +609,6 @@
 	ale_get_macaddr(sc);
 
 	ifp = sc->ale_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "cannot allocate ifnet structure.\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/altera/atse/if_atse.c b/sys/dev/altera/atse/if_atse.c
--- a/sys/dev/altera/atse/if_atse.c
+++ b/sys/dev/altera/atse/if_atse.c
@@ -1372,11 +1372,6 @@
 
 	/* Setup interface. */
 	ifp = sc->atse_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "if_alloc() failed\n");
-		error = ENOSPC;
-		goto err;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/axgbe/if_axgbe.c b/sys/dev/axgbe/if_axgbe.c
--- a/sys/dev/axgbe/if_axgbe.c
+++ b/sys/dev/axgbe/if_axgbe.c
@@ -388,11 +388,6 @@
 	OF_getprop(node, "mac-address", sc->mac_addr, ETHER_ADDR_LEN);
 
 	sc->prv.netdev = ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "Cannot alloc ifnet\n");
-		return (ENXIO);
-	}
-
 	sc->prv.dev = dev;
 	sc->prv.dmat = bus_get_dma_tag(dev);
 	sc->prv.phy.advertising = ADVERTISED_10000baseKR_Full |
diff --git a/sys/dev/bce/if_bce.c b/sys/dev/bce/if_bce.c
--- a/sys/dev/bce/if_bce.c
+++ b/sys/dev/bce/if_bce.c
@@ -1351,12 +1351,6 @@
 
 	/* Allocate an ifnet structure. */
 	ifp = sc->bce_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		BCE_PRINTF("%s(%d): Interface allocation failed!\n",
-		    __FILE__, __LINE__);
-		rc = ENXIO;
-		goto bce_attach_fail;
-	}
 
 	/* Initialize the ifnet interface. */
 	if_setsoftc(ifp, sc);
diff --git a/sys/dev/bfe/if_bfe.c b/sys/dev/bfe/if_bfe.c
--- a/sys/dev/bfe/if_bfe.c
+++ b/sys/dev/bfe/if_bfe.c
@@ -477,11 +477,6 @@
 
 	/* Set up ifnet structure */
 	ifp = sc->bfe_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "failed to if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/bge/if_bge.c b/sys/dev/bge/if_bge.c
--- a/sys/dev/bge/if_bge.c
+++ b/sys/dev/bge/if_bge.c
@@ -3712,11 +3712,6 @@
 
 	/* Set up ifnet structure */
 	ifp = sc->bge_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(sc->bge_dev, "failed to if_alloc()\n");
-		error = ENXIO;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/bxe/bxe.c b/sys/dev/bxe/bxe.c
--- a/sys/dev/bxe/bxe.c
+++ b/sys/dev/bxe/bxe.c
@@ -12965,7 +12965,7 @@
     BXE_CORE_UNLOCK(sc);
 }
 
-static int
+static void
 bxe_init_ifnet(struct bxe_softc *sc)
 {
     if_t ifp;
@@ -12985,10 +12985,7 @@
 	BLOGI(sc, "IFMEDIA flags : %x\n", sc->ifmedia.ifm_media);
 
     /* allocate the ifnet structure */
-    if ((ifp = if_gethandle(IFT_ETHER)) == NULL) {
-        BLOGE(sc, "Interface allocation failed!\n");
-        return (ENXIO);
-    }
+    ifp = if_gethandle(IFT_ETHER);
 
     if_setsoftc(ifp, sc);
     if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));
@@ -13034,8 +13031,6 @@
 
     /* Attach driver debugnet methods. */
     DEBUGNET_SET(ifp, bxe);
-
-    return (0);
 }
 
 static void
@@ -16261,12 +16256,7 @@
     bxe_get_phy_info(sc);
 
     /* initialize the FreeBSD ifnet interface */
-    if (bxe_init_ifnet(sc) != 0) {
-        bxe_release_mutexes(sc);
-        bxe_deallocate_bars(sc);
-        pci_disable_busmaster(dev);
-        return (ENXIO);
-    }
+    bxe_init_ifnet(sc);
 
     if (bxe_add_cdev(sc) != 0) {
         if (sc->ifp != NULL) {
diff --git a/sys/dev/cadence/if_cgem.c b/sys/dev/cadence/if_cgem.c
--- a/sys/dev/cadence/if_cgem.c
+++ b/sys/dev/cadence/if_cgem.c
@@ -1813,11 +1813,6 @@
 
 	/* Set up ifnet structure. */
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "could not allocate ifnet structure\n");
-		cgem_detach(dev);
-		return (ENOMEM);
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, IF_CGEM_NAME, device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/cas/if_cas.c b/sys/dev/cas/if_cas.c
--- a/sys/dev/cas/if_cas.c
+++ b/sys/dev/cas/if_cas.c
@@ -188,8 +188,6 @@
 
 	/* Set up ifnet structure. */
 	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		return (ENOSPC);
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(sc->sc_dev),
 	    device_get_unit(sc->sc_dev));
diff --git a/sys/dev/cxgb/cxgb_main.c b/sys/dev/cxgb/cxgb_main.c
--- a/sys/dev/cxgb/cxgb_main.c
+++ b/sys/dev/cxgb/cxgb_main.c
@@ -1011,11 +1011,6 @@
 
 	/* Allocate an ifnet object and set it up */
 	ifp = p->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "Cannot allocate ifnet\n");
-		return (ENOMEM);
-	}
-	
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setinitfn(ifp, cxgb_init);
 	if_setsoftc(ifp, p);
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -2544,7 +2544,7 @@
     IFCAP_HWRXTSTMP | IFCAP_MEXTPG)
 #define T4_CAP_ENABLE (T4_CAP)
 
-static int
+static void
 cxgbe_vi_attach(device_t dev, struct vi_info *vi)
 {
 	if_t ifp;
@@ -2583,10 +2583,6 @@
 
 	/* Allocate an ifnet and set it up */
 	ifp = if_alloc_dev(IFT_ETHER, dev);
-	if (ifp == NULL) {
-		device_printf(dev, "Cannot allocate ifnet\n");
-		return (ENOMEM);
-	}
 	vi->ifp = ifp;
 	if_setsoftc(ifp, vi);
 
@@ -2689,8 +2685,6 @@
 	pa.pa_type = PFIL_TYPE_ETHERNET;
 	pa.pa_headname = if_name(ifp);
 	vi->pfil = pfil_head_register(&pa);
-
-	return (0);
 }
 
 static int
@@ -2699,13 +2693,11 @@
 	struct port_info *pi = device_get_softc(dev);
 	struct adapter *sc = pi->adapter;
 	struct vi_info *vi;
-	int i, rc;
+	int i;
 
 	sysctl_ctx_init(&pi->ctx);
 
-	rc = cxgbe_vi_attach(dev, &pi->vi[0]);
-	if (rc)
-		return (rc);
+	cxgbe_vi_attach(dev, &pi->vi[0]);
 
 	for_each_vi(pi, i, vi) {
 		if (i == 0)
@@ -3584,11 +3576,8 @@
 	if (rc)
 		return (rc);
 
-	rc = cxgbe_vi_attach(dev, vi);
-	if (rc) {
-		t4_free_vi(sc, sc->mbox, sc->pf, 0, vi->viid);
-		return (rc);
-	}
+	cxgbe_vi_attach(dev, vi);
+
 	return (0);
 }
 
diff --git a/sys/dev/cxgbe/t4_tracer.c b/sys/dev/cxgbe/t4_tracer.c
--- a/sys/dev/cxgbe/t4_tracer.c
+++ b/sys/dev/cxgbe/t4_tracer.c
@@ -167,11 +167,6 @@
 	}
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		rc = ENOMEM;
-		goto done;
-	}
-
 	/* Note that if_xname is identical to the nexus nameunit */
 	if_initname(ifp, name, -1);
 	if_setdname(ifp, t4_cloner_name);
diff --git a/sys/dev/dc/if_dc.c b/sys/dev/dc/if_dc.c
--- a/sys/dev/dc/if_dc.c
+++ b/sys/dev/dc/if_dc.c
@@ -2380,11 +2380,6 @@
 		goto fail;
 
 	ifp = sc->dc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/dpaa/if_dtsec.c b/sys/dev/dpaa/if_dtsec.c
--- a/sys/dev/dpaa/if_dtsec.c
+++ b/sys/dev/dpaa/if_dtsec.c
@@ -708,12 +708,6 @@
 
 	/* Create network interface for upper layers */
 	ifp = sc->sc_ifnet = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(sc->sc_dev, "if_alloc() failed.\n");
-		dtsec_detach(dev);
-		return (ENOMEM);
-	}
-
 	if_setsoftc(ifp, sc);
 
 	if_setflags(ifp, IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
diff --git a/sys/dev/dpaa2/dpaa2_ni.c b/sys/dev/dpaa2/dpaa2_ni.c
--- a/sys/dev/dpaa2/dpaa2_ni.c
+++ b/sys/dev/dpaa2/dpaa2_ni.c
@@ -548,11 +548,6 @@
 
 	/* Allocate network interface */
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "%s: failed to allocate network interface\n",
-		    __func__);
-		goto err_exit;
-	}
 	sc->ifp = ifp;
 	if_initname(ifp, DPAA2_NI_IFNAME, device_get_unit(sc->dev));
 
diff --git a/sys/dev/ena/ena.c b/sys/dev/ena/ena.c
--- a/sys/dev/ena/ena.c
+++ b/sys/dev/ena/ena.c
@@ -148,7 +148,7 @@
 static int ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *);
 static void ena_update_host_info(struct ena_admin_host_info *, if_t);
 static void ena_update_hwassist(struct ena_adapter *);
-static int ena_setup_ifnet(device_t, struct ena_adapter *,
+static void ena_setup_ifnet(device_t, struct ena_adapter *,
     struct ena_com_dev_get_features_ctx *);
 static int ena_enable_wc(device_t, struct resource *);
 static int ena_set_queues_placement_policy(device_t, struct ena_com_dev *,
@@ -2462,7 +2462,7 @@
 	if_sethwassistbits(ifp, flags, 0);
 }
 
-static int
+static void
 ena_setup_ifnet(device_t pdev, struct ena_adapter *adapter,
     struct ena_com_dev_get_features_ctx *feat)
 {
@@ -2470,10 +2470,6 @@
 	int caps = 0;
 
 	ifp = adapter->ifp = if_gethandle(IFT_ETHER);
-	if (unlikely(ifp == NULL)) {
-		ena_log(pdev, ERR, "can not allocate ifnet structure\n");
-		return (ENXIO);
-	}
 	if_initname(ifp, device_get_name(pdev), device_get_unit(pdev));
 	if_setdev(ifp, pdev);
 	if_setsoftc(ifp, adapter);
@@ -2516,8 +2512,6 @@
 	ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
 
 	ether_ifattach(ifp, adapter->mac_addr);
-
-	return (0);
 }
 
 void
@@ -3811,11 +3805,7 @@
 	ena_sysctl_add_nodes(adapter);
 
 	/* setup network interface */
-	rc = ena_setup_ifnet(pdev, adapter, &get_feat_ctx);
-	if (unlikely(rc != 0)) {
-		ena_log(pdev, ERR, "Error with network interface setup\n");
-		goto err_customer_metrics_alloc;
-	}
+	ena_setup_ifnet(pdev, adapter, &get_feat_ctx);
 
 	/* Initialize reset task queue */
 	TASK_INIT(&adapter->reset_task, 0, ena_reset_task, adapter);
@@ -3852,7 +3842,6 @@
 err_detach:
 	ether_ifdetach(adapter->ifp);
 #endif /* DEV_NETMAP */
-err_customer_metrics_alloc:
 	free(adapter->customer_metrics_array, M_DEVBUF);
 err_metrics_buffer_destroy:
 	ena_com_delete_customer_metrics_buffer(ena_dev);
diff --git a/sys/dev/et/if_et.c b/sys/dev/et/if_et.c
--- a/sys/dev/et/if_et.c
+++ b/sys/dev/et/if_et.c
@@ -231,11 +231,6 @@
 	callout_init_mtx(&sc->sc_tick, &sc->sc_mtx, 0);
 
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 
 	/*
 	 * Initialize tunables
diff --git a/sys/dev/etherswitch/ar40xx/ar40xx_phy.c b/sys/dev/etherswitch/ar40xx/ar40xx_phy.c
--- a/sys/dev/etherswitch/ar40xx/ar40xx_phy.c
+++ b/sys/dev/etherswitch/ar40xx/ar40xx_phy.c
@@ -200,14 +200,6 @@
 	snprintf(name, IFNAMSIZ, "%sport", device_get_nameunit(sc->sc_dev));
 	for (phy = 0; phy < AR40XX_NUM_PHYS; phy++) {
 		sc->sc_phys.ifp[phy] = if_alloc(IFT_ETHER);
-		if (sc->sc_phys.ifp[phy] == NULL) {
-			device_printf(sc->sc_dev,
-			    "PHY %d: couldn't allocate ifnet structure\n",
-			    phy);
-			err = ENOMEM;
-			break;
-		}
-
 		sc->sc_phys.ifp[phy]->if_softc = sc;
 		sc->sc_phys.ifp[phy]->if_flags |= IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX;
diff --git a/sys/dev/etherswitch/arswitch/arswitch.c b/sys/dev/etherswitch/arswitch/arswitch.c
--- a/sys/dev/etherswitch/arswitch/arswitch.c
+++ b/sys/dev/etherswitch/arswitch/arswitch.c
@@ -150,12 +150,6 @@
 	snprintf(name, IFNAMSIZ, "%sport", device_get_nameunit(sc->sc_dev));
 	for (phy = 0; phy < sc->numphys; phy++) {
 		sc->ifp[phy] = if_alloc(IFT_ETHER);
-		if (sc->ifp[phy] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		if_setsoftc(sc->ifp[phy], sc);
 		if_setflagbits(sc->ifp[phy], IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX, 0);
diff --git a/sys/dev/etherswitch/e6000sw/e6000sw.c b/sys/dev/etherswitch/e6000sw/e6000sw.c
--- a/sys/dev/etherswitch/e6000sw/e6000sw.c
+++ b/sys/dev/etherswitch/e6000sw/e6000sw.c
@@ -454,8 +454,6 @@
 	snprintf(name, IFNAMSIZ, "%sport", device_get_nameunit(sc->dev));
 
 	sc->ifp[port] = if_alloc(IFT_ETHER);
-	if (sc->ifp[port] == NULL)
-		return (ENOMEM);
 	if_setsoftc(sc->ifp[port], sc);
 	if_setflagbits(sc->ifp[port], IFF_UP | IFF_BROADCAST |
 	    IFF_DRV_RUNNING | IFF_SIMPLEX, 0);
diff --git a/sys/dev/etherswitch/e6000sw/e6060sw.c b/sys/dev/etherswitch/e6000sw/e6060sw.c
--- a/sys/dev/etherswitch/e6000sw/e6060sw.c
+++ b/sys/dev/etherswitch/e6000sw/e6060sw.c
@@ -214,12 +214,6 @@
 		sc->ifpport[phy] = port;
 		sc->portphy[port] = phy;
 		sc->ifp[port] = if_alloc(IFT_ETHER);
-		if (sc->ifp[port] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		sc->ifp[port]->if_softc = sc;
 		sc->ifp[port]->if_flags |= IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX;
diff --git a/sys/dev/etherswitch/felix/felix.c b/sys/dev/etherswitch/felix/felix.c
--- a/sys/dev/etherswitch/felix/felix.c
+++ b/sys/dev/etherswitch/felix/felix.c
@@ -240,9 +240,6 @@
 	snprintf(name, IFNAMSIZ, "%sport", device_get_nameunit(sc->dev));
 
 	sc->ports[port].ifp = if_alloc(IFT_ETHER);
-	if (sc->ports[port].ifp == NULL)
-		return (ENOMEM);
-
 	if_setsoftc(sc->ports[port].ifp, sc);
 	if_setflags(sc->ports[port].ifp, IFF_UP | IFF_BROADCAST | IFF_MULTICAST |
 	    IFF_DRV_RUNNING | IFF_SIMPLEX);
diff --git a/sys/dev/etherswitch/infineon/adm6996fc.c b/sys/dev/etherswitch/infineon/adm6996fc.c
--- a/sys/dev/etherswitch/infineon/adm6996fc.c
+++ b/sys/dev/etherswitch/infineon/adm6996fc.c
@@ -173,12 +173,6 @@
 		sc->ifpport[phy] = port;
 		sc->portphy[port] = phy;
 		sc->ifp[port] = if_alloc(IFT_ETHER);
-		if (sc->ifp[port] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		sc->ifp[port]->if_softc = sc;
 		sc->ifp[port]->if_flags |= IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX;
diff --git a/sys/dev/etherswitch/ip17x/ip17x.c b/sys/dev/etherswitch/ip17x/ip17x.c
--- a/sys/dev/etherswitch/ip17x/ip17x.c
+++ b/sys/dev/etherswitch/ip17x/ip17x.c
@@ -172,12 +172,6 @@
 		sc->phyport[phy] = port;
 		sc->portphy[port] = phy;
 		sc->ifp[port] = if_alloc(IFT_ETHER);
-		if (sc->ifp[port] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		if_setsoftc(sc->ifp[port], sc);
 		if_setflags(sc->ifp[port], IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX);
diff --git a/sys/dev/etherswitch/micrel/ksz8995ma.c b/sys/dev/etherswitch/micrel/ksz8995ma.c
--- a/sys/dev/etherswitch/micrel/ksz8995ma.c
+++ b/sys/dev/etherswitch/micrel/ksz8995ma.c
@@ -219,12 +219,6 @@
 		sc->ifpport[phy] = port;
 		sc->portphy[port] = phy;
 		sc->ifp[port] = if_alloc(IFT_ETHER);
-		if (sc->ifp[port] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		sc->ifp[port]->if_softc = sc;
 		sc->ifp[port]->if_flags |= IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX;
diff --git a/sys/dev/etherswitch/mtkswitch/mtkswitch.c b/sys/dev/etherswitch/mtkswitch/mtkswitch.c
--- a/sys/dev/etherswitch/mtkswitch/mtkswitch.c
+++ b/sys/dev/etherswitch/mtkswitch/mtkswitch.c
@@ -121,12 +121,6 @@
 			continue;
 		}
 		sc->ifp[phy] = if_alloc(IFT_ETHER);
-		if (sc->ifp[phy] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		sc->ifp[phy]->if_softc = sc;
 		sc->ifp[phy]->if_flags |= IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX;
diff --git a/sys/dev/etherswitch/rtl8366/rtl8366rb.c b/sys/dev/etherswitch/rtl8366/rtl8366rb.c
--- a/sys/dev/etherswitch/rtl8366/rtl8366rb.c
+++ b/sys/dev/etherswitch/rtl8366/rtl8366rb.c
@@ -238,12 +238,6 @@
 	/* PHYs need an interface, so we generate a dummy one */
 	for (i = 0; i < sc->numphys; i++) {
 		sc->ifp[i] = if_alloc(IFT_ETHER);
-		if (sc->ifp[i] == NULL) {
-			device_printf(dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		if_setsoftc(sc->ifp[i], sc);
 		if_setflagbits(sc->ifp[i], IFF_UP | IFF_BROADCAST | IFF_DRV_RUNNING
 			| IFF_SIMPLEX, 0);
diff --git a/sys/dev/etherswitch/ukswitch/ukswitch.c b/sys/dev/etherswitch/ukswitch/ukswitch.c
--- a/sys/dev/etherswitch/ukswitch/ukswitch.c
+++ b/sys/dev/etherswitch/ukswitch/ukswitch.c
@@ -124,12 +124,6 @@
 		sc->ifpport[phy] = port;
 		sc->portphy[port] = phy;
 		sc->ifp[port] = if_alloc(IFT_ETHER);
-		if (sc->ifp[port] == NULL) {
-			device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n");
-			err = ENOMEM;
-			break;
-		}
-
 		if_setsoftc(sc->ifp[port], sc);
 		if_setflags(sc->ifp[port], IFF_UP | IFF_BROADCAST |
 		    IFF_DRV_RUNNING | IFF_SIMPLEX);
diff --git a/sys/dev/firewire/if_fwe.c b/sys/dev/firewire/if_fwe.c
--- a/sys/dev/firewire/if_fwe.c
+++ b/sys/dev/firewire/if_fwe.c
@@ -178,10 +178,6 @@
 
 	/* fill the rest and attach interface */
 	ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		return (ENOSPC);
-	}
 	if_setsoftc(ifp, &fwe->eth_softc);
 
 	if_initname(ifp, device_get_name(dev), unit);
@@ -201,7 +197,7 @@
 	if_setcapenablebit(ifp, IFCAP_VLAN_MTU, 0);
 
 	FWEDEBUG(ifp, "interface created\n");
-	return 0;
+	return (0);
 }
 
 static void
diff --git a/sys/dev/firewire/if_fwip.c b/sys/dev/firewire/if_fwip.c
--- a/sys/dev/firewire/if_fwip.c
+++ b/sys/dev/firewire/if_fwip.c
@@ -153,8 +153,6 @@
 	fwip = ((struct fwip_softc *)device_get_softc(dev));
 	unit = device_get_unit(dev);
 	ifp = fwip->fw_softc.fwip_ifp = if_alloc(IFT_IEEE1394);
-	if (ifp == NULL)
-		return (ENOSPC);
 
 	mtx_init(&fwip->mtx, "fwip", NULL, MTX_DEF);
 	/* XXX */
@@ -199,7 +197,7 @@
 	splx(s);
 
 	FWIPDEBUG(ifp, "interface created\n");
-	return 0;
+	return (0);
 }
 
 static void
diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c
--- a/sys/dev/fxp/if_fxp.c
+++ b/sys/dev/fxp/if_fxp.c
@@ -443,11 +443,6 @@
 	    fxp_serial_ifmedia_sts);
 
 	ifp = sc->ifp = if_gethandle(IFT_ETHER);
-	if (ifp == (void *)NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 
 	/*
 	 * Enable bus mastering.
diff --git a/sys/dev/gem/if_gem.c b/sys/dev/gem/if_gem.c
--- a/sys/dev/gem/if_gem.c
+++ b/sys/dev/gem/if_gem.c
@@ -152,8 +152,6 @@
 
 	/* Set up ifnet structure. */
 	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		return (ENOSPC);
 	sc->sc_csum_features = GEM_CSUM_FEATURES;
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(sc->sc_dev),
diff --git a/sys/dev/gve/gve_main.c b/sys/dev/gve/gve_main.c
--- a/sys/dev/gve/gve_main.c
+++ b/sys/dev/gve/gve_main.c
@@ -352,18 +352,13 @@
 	}
 }
 
-static int
+static void
 gve_setup_ifnet(device_t dev, struct gve_priv *priv)
 {
 	int caps = 0;
 	if_t ifp;
 
 	ifp = priv->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(priv->dev, "Failed to allocate ifnet struct\n");
-		return (ENXIO);
-	}
-
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setsoftc(ifp, priv);
 	if_setdev(ifp, dev);
@@ -401,8 +396,6 @@
 
 	ifmedia_add(&priv->media, IFM_ETHER | IFM_AUTO, 0, NULL);
 	ifmedia_set(&priv->media, IFM_ETHER | IFM_AUTO);
-
-	return (0);
 }
 
 static int
@@ -794,9 +787,7 @@
 	if (err != 0)
 		goto abort;
 
-	err = gve_setup_ifnet(dev, priv);
-	if (err != 0)
-		goto abort;
+	gve_setup_ifnet(dev, priv);
 
 	priv->rx_copybreak = GVE_DEFAULT_RX_COPYBREAK;
 
diff --git a/sys/dev/iicbus/if_ic.c b/sys/dev/iicbus/if_ic.c
--- a/sys/dev/iicbus/if_ic.c
+++ b/sys/dev/iicbus/if_ic.c
@@ -162,8 +162,6 @@
 	if_t ifp;
 
 	ifp = sc->ic_ifp = if_alloc(IFT_PARA);
-	if (ifp == NULL)
-		return (ENOSPC);
 
 	mtx_init(&sc->ic_lock, device_get_nameunit(dev), MTX_NETWORK_LOCK,
 	    MTX_DEF);
diff --git a/sys/dev/jme/if_jme.c b/sys/dev/jme/if_jme.c
--- a/sys/dev/jme/if_jme.c
+++ b/sys/dev/jme/if_jme.c
@@ -804,12 +804,6 @@
 		goto fail;
 
 	ifp = sc->jme_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "cannot allocate ifnet structure.\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/le/lance.c b/sys/dev/le/lance.c
--- a/sys/dev/le/lance.c
+++ b/sys/dev/le/lance.c
@@ -107,8 +107,6 @@
 		return (ENXIO);
 
 	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		return (ENOSPC);
 
 	callout_init_mtx(&sc->sc_wdog_ch, &sc->sc_mtx, 0);
 
diff --git a/sys/dev/lge/if_lge.c b/sys/dev/lge/if_lge.c
--- a/sys/dev/lge/if_lge.c
+++ b/sys/dev/lge/if_lge.c
@@ -512,11 +512,6 @@
 	}
 
 	ifp = sc->lge_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/liquidio/lio_main.c b/sys/dev/liquidio/lio_main.c
--- a/sys/dev/liquidio/lio_main.c
+++ b/sys/dev/liquidio/lio_main.c
@@ -1327,11 +1327,6 @@
 
 		ifp = if_alloc(IFT_ETHER);
 
-		if (ifp == NULL) {
-			lio_dev_err(octeon_dev, "Device allocation failed\n");
-			goto setup_nic_dev_fail;
-		}
-
 		lio = malloc(sizeof(struct lio), M_DEVBUF, M_NOWAIT | M_ZERO);
 
 		if (lio == NULL) {
diff --git a/sys/dev/mana/mana_en.c b/sys/dev/mana/mana_en.c
--- a/sys/dev/mana/mana_en.c
+++ b/sys/dev/mana/mana_en.c
@@ -2805,11 +2805,6 @@
 	int err;
 
 	ndev = if_alloc_dev(IFT_ETHER, gc->dev);
-	if (!ndev) {
-		mana_err(NULL, "Failed to allocate ifnet struct\n");
-		return ENOMEM;
-	}
-
 	*ndev_storage = ndev;
 
 	apc = malloc(sizeof(*apc), M_DEVBUF, M_WAITOK | M_ZERO);
diff --git a/sys/dev/mge/if_mge.c b/sys/dev/mge/if_mge.c
--- a/sys/dev/mge/if_mge.c
+++ b/sys/dev/mge/if_mge.c
@@ -847,12 +847,6 @@
 
 	/* Allocate network interface */
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "if_alloc() failed\n");
-		mge_detach(dev);
-		return (ENOMEM);
-	}
-
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setsoftc(ifp, sc);
 	if_setflags(ifp, IFF_SIMPLEX | IFF_MULTICAST | IFF_BROADCAST);
diff --git a/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c b/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c
--- a/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c
+++ b/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c
@@ -2143,11 +2143,6 @@
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	dev = priv->dev = if_alloc(IFT_ETHER);
-	if (dev == NULL) {
-		en_err(priv, "Net device allocation failed\n");
-		kfree(priv);
-		return -ENOMEM;
-	}
 	if_setsoftc(dev, priv);
 	if_initname(dev, "mlxen", (device_get_unit(
 	    mdev->pdev->dev.bsddev) * MLX4_MAX_PORTS) + port - 1);
diff --git a/sys/dev/mlx5/mlx5_en/mlx5_en_main.c b/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
--- a/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
+++ b/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
@@ -4486,10 +4486,6 @@
 	    M_MLX5EN, mlx5_dev_domainset(mdev), M_WAITOK | M_ZERO);
 
 	ifp = priv->ifp = if_alloc_dev(IFT_ETHER, mdev->pdev->dev.bsddev);
-	if (ifp == NULL) {
-		mlx5_core_err(mdev, "if_alloc() failed\n");
-		goto err_free_priv;
-	}
 	/* setup all static fields */
 	if (mlx5e_priv_static_init(priv, mdev, mdev->priv.eq_table.num_comp_vectors)) {
 		mlx5_core_err(mdev, "mlx5e_priv_static_init() failed\n");
@@ -4829,8 +4825,6 @@
 
 err_free_ifp:
 	if_free(ifp);
-
-err_free_priv:
 	free(priv, M_MLX5EN);
 	return (NULL);
 }
diff --git a/sys/dev/msk/if_msk.c b/sys/dev/msk/if_msk.c
--- a/sys/dev/msk/if_msk.c
+++ b/sys/dev/msk/if_msk.c
@@ -1623,11 +1623,6 @@
 	msk_rx_dma_jalloc(sc_if);
 
 	ifp = sc_if->msk_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(sc_if->msk_if_dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc_if);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/mxge/if_mxge.c b/sys/dev/mxge/if_mxge.c
--- a/sys/dev/mxge/if_mxge.c
+++ b/sys/dev/mxge/if_mxge.c
@@ -4640,11 +4640,6 @@
 	}
 
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		err = ENOSPC;
-		goto abort_with_parent_dmat;
-	}
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 
 	snprintf(sc->cmd_mtx_name, sizeof(sc->cmd_mtx_name), "%s:cmd",
@@ -4813,7 +4808,6 @@
 	mtx_destroy(&sc->cmd_mtx);
 	mtx_destroy(&sc->driver_mtx);
 	if_free(ifp);
-abort_with_parent_dmat:
 	bus_dma_tag_destroy(sc->parent_dmat);
 abort_with_tq:
 	if (sc->tq != NULL) {
diff --git a/sys/dev/my/if_my.c b/sys/dev/my/if_my.c
--- a/sys/dev/my/if_my.c
+++ b/sys/dev/my/if_my.c
@@ -873,11 +873,6 @@
 	bzero(sc->my_ldata, sizeof(struct my_list_data));
 
 	ifp = sc->my_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto free_ldata;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
@@ -961,7 +956,6 @@
 	ether_ifdetach(ifp);
 free_if:
 	if_free(ifp);
-free_ldata:
 	free(sc->my_ldata_ptr, M_DEVBUF);
 release_irq:
 	bus_release_resource(dev, SYS_RES_IRQ, 0, sc->my_irq);
diff --git a/sys/dev/neta/if_mvneta.c b/sys/dev/neta/if_mvneta.c
--- a/sys/dev/neta/if_mvneta.c
+++ b/sys/dev/neta/if_mvneta.c
@@ -612,11 +612,6 @@
 
 	/* Allocate network interface */
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(self, "if_alloc() failed\n");
-		mvneta_detach(self);
-		return (ENOMEM);
-	}
 	if_initname(ifp, device_get_name(self), device_get_unit(self));
 
 	/*
diff --git a/sys/dev/netmap/if_ptnet.c b/sys/dev/netmap/if_ptnet.c
--- a/sys/dev/netmap/if_ptnet.c
+++ b/sys/dev/netmap/if_ptnet.c
@@ -399,12 +399,6 @@
 
 	/* Setup Ethernet interface. */
 	sc->ifp = ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "Failed to allocate ifnet\n");
-		err = ENOMEM;
-		goto err_path;
-	}
-
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setbaudrate(ifp, IF_Gbps(10));
 	if_setsoftc(ifp, sc);
diff --git a/sys/dev/netmap/netmap_freebsd.c b/sys/dev/netmap/netmap_freebsd.c
--- a/sys/dev/netmap/netmap_freebsd.c
+++ b/sys/dev/netmap/netmap_freebsd.c
@@ -612,10 +612,6 @@
 	eaddr[5] = (uint8_t)unit;
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		nm_prerr("if_alloc failed");
-		return ENOMEM;
-	}
 	if_initname(ifp, name, IF_DUNIT_NONE);
 	if_setflags(ifp, IFF_UP | IFF_SIMPLEX | IFF_MULTICAST);
 	if_setinitfn(ifp, (void *)nm_vi_dummy);
diff --git a/sys/dev/nfe/if_nfe.c b/sys/dev/nfe/if_nfe.c
--- a/sys/dev/nfe/if_nfe.c
+++ b/sys/dev/nfe/if_nfe.c
@@ -567,11 +567,6 @@
 		goto fail;
 
 	ifp = sc->nfe_ifp = if_gethandle(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_gethandle()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 
 	/*
 	 * Allocate Tx and Rx rings.
diff --git a/sys/dev/nge/if_nge.c b/sys/dev/nge/if_nge.c
--- a/sys/dev/nge/if_nge.c
+++ b/sys/dev/nge/if_nge.c
@@ -900,11 +900,6 @@
 	nge_sysctl_node(sc);
 
 	ifp = sc->nge_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not allocate ifnet structure\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/ntb/if_ntb/if_ntb.c b/sys/dev/ntb/if_ntb/if_ntb.c
--- a/sys/dev/ntb/if_ntb/if_ntb.c
+++ b/sys/dev/ntb/if_ntb/if_ntb.c
@@ -136,10 +136,6 @@
 	int i;
 
 	ifp = sc->ifp = if_gethandle(IFT_ETHER);
-	if (ifp == NULL) {
-		printf("ntb: Cannot allocate ifnet structure\n");
-		return (ENOMEM);
-	}
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setdev(ifp, dev);
 
diff --git a/sys/dev/oce/oce_if.c b/sys/dev/oce/oce_if.c
--- a/sys/dev/oce/oce_if.c
+++ b/sys/dev/oce/oce_if.c
@@ -170,7 +170,7 @@
 static void oce_rx_mbuf_chain(struct oce_rq *rq, struct oce_common_cqe_info *cqe_info, struct mbuf **m);
 
 /* Helper function prototypes in this file */
-static int  oce_attach_ifp(POCE_SOFTC sc);
+static void oce_attach_ifp(POCE_SOFTC sc);
 static void oce_add_vlan(void *arg, if_t ifp, uint16_t vtag);
 static void oce_del_vlan(void *arg, if_t ifp, uint16_t vtag);
 static int  oce_vid_config(POCE_SOFTC sc);
@@ -334,9 +334,7 @@
 	if (rc)
 		goto intr_free;
 
-	rc = oce_attach_ifp(sc);
-	if (rc)
-		goto queues_free;
+	oce_attach_ifp(sc);
 
 #if defined(INET6) || defined(INET)
 	rc = oce_init_lro(sc);
@@ -392,7 +390,6 @@
 #endif
 	ether_ifdetach(sc->ifp);
 	if_free(sc->ifp);
-queues_free:
 	oce_queue_release_all(sc);
 intr_free:
 	oce_intr_free(sc);
@@ -2099,13 +2096,11 @@
  *		   Helper function prototypes in this file 		     *
  *****************************************************************************/
 
-static int 
+static void
 oce_attach_ifp(POCE_SOFTC sc)
 {
 
 	sc->ifp = if_alloc(IFT_ETHER);
-	if (!sc->ifp)
-		return ENOMEM;
 
 	ifmedia_init(&sc->media, IFM_IMASK, oce_media_change, oce_media_status);
 	ifmedia_add(&sc->media, IFM_ETHER | IFM_AUTO, 0, NULL);
@@ -2148,8 +2143,6 @@
 	if_sethwtsomaxsegsize(sc->ifp, 4096);
 
 	ether_ifattach(sc->ifp, sc->macaddr.mac_addr);
-
-	return 0;
 }
 
 static void
diff --git a/sys/dev/ppbus/if_plip.c b/sys/dev/ppbus/if_plip.c
--- a/sys/dev/ppbus/if_plip.c
+++ b/sys/dev/ppbus/if_plip.c
@@ -249,10 +249,6 @@
 	}
 
 	ifp = lp->sc_ifp = if_alloc(IFT_PARA);
-	if (ifp == NULL) {
-		return (ENOSPC);
-	}
-
 	if_setsoftc(ifp, lp);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setmtu(ifp, LPMTU);
diff --git a/sys/dev/qlnx/qlnxe/qlnx_os.c b/sys/dev/qlnx/qlnxe/qlnx_os.c
--- a/sys/dev/qlnx/qlnxe/qlnx_os.c
+++ b/sys/dev/qlnx/qlnxe/qlnx_os.c
@@ -2292,10 +2292,6 @@
         if_t		ifp;
 
         ifp = ha->ifp = if_alloc(IFT_ETHER);
-
-        if (ifp == NULL)
-                panic("%s: cannot if_alloc()\n", device_get_nameunit(dev));
-
         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 
 	device_id = pci_get_device(ha->pci_dev);
diff --git a/sys/dev/qlxgb/qla_os.c b/sys/dev/qlxgb/qla_os.c
--- a/sys/dev/qlxgb/qla_os.c
+++ b/sys/dev/qlxgb/qla_os.c
@@ -658,9 +658,6 @@
 
 	ifp = ha->ifp = if_alloc(IFT_ETHER);
 
-	if (ifp == NULL)
-		panic("%s: cannot if_alloc()\n", device_get_nameunit(dev));
-
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 
 	if_setmtu(ifp, ETHERMTU);
diff --git a/sys/dev/qlxgbe/ql_os.c b/sys/dev/qlxgbe/ql_os.c
--- a/sys/dev/qlxgbe/ql_os.c
+++ b/sys/dev/qlxgbe/ql_os.c
@@ -852,10 +852,6 @@
 	QL_DPRINT2(ha, (dev, "%s: enter\n", __func__));
 
 	ifp = ha->ifp = if_alloc(IFT_ETHER);
-
-	if (ifp == NULL)
-		panic("%s: cannot if_alloc()\n", device_get_nameunit(dev));
-
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 
 	if_setbaudrate(ifp, IF_Gbps(10));
diff --git a/sys/dev/qlxge/qls_os.c b/sys/dev/qlxge/qls_os.c
--- a/sys/dev/qlxge/qls_os.c
+++ b/sys/dev/qlxge/qls_os.c
@@ -719,10 +719,6 @@
 	QL_DPRINT2((dev, "%s: enter\n", __func__));
 
 	ifp = ha->ifp = if_alloc(IFT_ETHER);
-
-	if (ifp == NULL)
-		panic("%s: cannot if_alloc()\n", device_get_nameunit(dev));
-
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setbaudrate(ifp, IF_Gbps(10));
 	if_setinitfn(ifp, qls_init);
diff --git a/sys/dev/re/if_re.c b/sys/dev/re/if_re.c
--- a/sys/dev/re/if_re.c
+++ b/sys/dev/re/if_re.c
@@ -1606,11 +1606,6 @@
 	re_add_sysctls(sc);
 
 	ifp = sc->rl_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 
 	/* Take controller out of deep sleep mode. */
 	if ((sc->rl_flags & RL_FLAG_MACSLEEP) != 0) {
diff --git a/sys/dev/rl/if_rl.c b/sys/dev/rl/if_rl.c
--- a/sys/dev/rl/if_rl.c
+++ b/sys/dev/rl/if_rl.c
@@ -780,11 +780,6 @@
 		goto fail;
 
 	ifp = sc->rl_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 
 #define	RL_PHYAD_INTERNAL	0
 
diff --git a/sys/dev/sbni/if_sbni.c b/sys/dev/sbni/if_sbni.c
--- a/sys/dev/sbni/if_sbni.c
+++ b/sys/dev/sbni/if_sbni.c
@@ -212,7 +212,7 @@
 /*
  * Install interface into kernel networking data structures
  */
-int
+void
 sbni_attach(struct sbni_softc *sc, int unit, struct sbni_flags flags)
 {
 	if_t ifp;
@@ -220,8 +220,6 @@
 	uint64_t baudrate;
    
 	ifp = sc->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		return (ENOMEM);
 	sbni_outb(sc, CSR0, 0);
 	set_initial_values(sc, flags);
 
@@ -250,7 +248,6 @@
 		printf("auto\n");
 	else
 		printf("%d (fixed)\n", sc->cur_rxl_index);
-	return (0);
 }
 
 void
diff --git a/sys/dev/sbni/if_sbni_isa.c b/sys/dev/sbni/if_sbni_isa.c
--- a/sys/dev/sbni/if_sbni_isa.c
+++ b/sys/dev/sbni/if_sbni_isa.c
@@ -136,12 +136,7 @@
 
 	*(u_int32_t*)&flags = device_get_flags(dev);
 
-	error = sbni_attach(sc, device_get_unit(dev) * 2, flags);
-	if (error) {
-		device_printf(dev, "cannot initialize driver\n");
-		sbni_release_resources(sc);
-		return (error);
-	}
+	sbni_attach(sc, device_get_unit(dev) * 2, flags);
 
 	if (sc->irq_res) {
 		error = bus_setup_intr(
diff --git a/sys/dev/sbni/if_sbni_pci.c b/sys/dev/sbni/if_sbni_pci.c
--- a/sys/dev/sbni/if_sbni_pci.c
+++ b/sys/dev/sbni/if_sbni_pci.c
@@ -131,20 +131,9 @@
 
 	memset(&flags, 0, sizeof(flags));
 
-	error = sbni_attach(sc, device_get_unit(dev) * 2, flags);
-	if (error) {
-		device_printf(dev, "cannot initialize driver\n");
-		goto attach_failed;
-	}
-	if (sc->slave_sc) {
-		error = sbni_attach(sc->slave_sc, device_get_unit(dev) * 2 + 1,
-		    flags);
-		if (error) {
-			device_printf(dev, "cannot initialize slave\n");
-			sbni_detach(sc);
-			goto attach_failed;
-		}
-	}
+	sbni_attach(sc, device_get_unit(dev) * 2, flags);
+	if (sc->slave_sc)
+		sbni_attach(sc->slave_sc, device_get_unit(dev) * 2 + 1, flags);
 
 	if (sc->irq_res) {
 		error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET |
diff --git a/sys/dev/sbni/if_sbnivar.h b/sys/dev/sbni/if_sbnivar.h
--- a/sys/dev/sbni/if_sbnivar.h
+++ b/sys/dev/sbni/if_sbnivar.h
@@ -125,7 +125,7 @@
 
 void	sbni_intr(void *);
 int	sbni_probe(struct sbni_softc *);
-int	sbni_attach(struct sbni_softc *, int, struct sbni_flags);
+void	sbni_attach(struct sbni_softc *, int, struct sbni_flags);
 void	sbni_detach(struct sbni_softc *);
 void	sbni_release_resources(struct sbni_softc *);
 
diff --git a/sys/dev/sfxge/sfxge.c b/sys/dev/sfxge/sfxge.c
--- a/sys/dev/sfxge/sfxge.c
+++ b/sys/dev/sfxge/sfxge.c
@@ -1081,11 +1081,6 @@
 
 	/* Allocate ifnet. */
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "Couldn't allocate ifnet\n");
-		error = ENOMEM;
-		goto fail;
-	}
 	sc->ifnet = ifp;
 
 	/* Initialize hardware. */
@@ -1122,8 +1117,6 @@
 
 fail2:
 	if_free(sc->ifnet);
-
-fail:
 	DBGPRINT(sc->dev, "failed %d", error);
 	return (error);
 }
diff --git a/sys/dev/sge/if_sge.c b/sys/dev/sge/if_sge.c
--- a/sys/dev/sge/if_sge.c
+++ b/sys/dev/sge/if_sge.c
@@ -603,11 +603,6 @@
 		goto fail;
 
 	ifp = sc->sge_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "cannot allocate ifnet structure.\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/sis/if_sis.c b/sys/dev/sis/if_sis.c
--- a/sys/dev/sis/if_sis.c
+++ b/sys/dev/sis/if_sis.c
@@ -1057,11 +1057,6 @@
 		goto fail;
 
 	ifp = sc->sis_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/sk/if_sk.c b/sys/dev/sk/if_sk.c
--- a/sys/dev/sk/if_sk.c
+++ b/sys/dev/sk/if_sk.c
@@ -1279,11 +1279,6 @@
 	sk_dma_jumbo_alloc(sc_if);
 
 	ifp = sc_if->sk_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(sc_if->sk_if_dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc_if);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/smc/if_smc.c b/sys/dev/smc/if_smc.c
--- a/sys/dev/smc/if_smc.c
+++ b/sys/dev/smc/if_smc.c
@@ -313,10 +313,6 @@
 	sc->smc_dev = dev;
 
 	ifp = sc->smc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		error = ENOSPC;
-		goto done;
-	}
 
 	mtx_init(&sc->smc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
 
diff --git a/sys/dev/ste/if_ste.c b/sys/dev/ste/if_ste.c
--- a/sys/dev/ste/if_ste.c
+++ b/sys/dev/ste/if_ste.c
@@ -987,11 +987,6 @@
 		goto fail;
 
 	ifp = sc->ste_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 
 	/* Do MII setup. */
 	phy = MII_PHY_ANY;
diff --git a/sys/dev/stge/if_stge.c b/sys/dev/stge/if_stge.c
--- a/sys/dev/stge/if_stge.c
+++ b/sys/dev/stge/if_stge.c
@@ -560,12 +560,6 @@
 	}
 
 	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(sc->sc_dev, "failed to if_alloc()\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/sume/if_sume.c b/sys/dev/sume/if_sume.c
--- a/sys/dev/sume/if_sume.c
+++ b/sys/dev/sume/if_sume.c
@@ -1143,7 +1143,7 @@
 	}
 }
 
-static int
+static void
 sume_ifp_alloc(struct sume_adapter *adapter, uint32_t port)
 {
 	if_t ifp;
@@ -1151,11 +1151,6 @@
 	    M_ZERO | M_WAITOK);
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(adapter->dev, "cannot allocate ifnet\n");
-		return (ENOMEM);
-	}
-
 	adapter->ifp[port] = ifp;
 	if_setsoftc(ifp, nf_priv);
 
@@ -1181,8 +1176,6 @@
 	ifmedia_set(&nf_priv->media, IFM_ETHER | IFM_10G_SR);
 
 	if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0);
-
-	return (0);
 }
 
 static void
@@ -1452,11 +1445,8 @@
 		goto error;
 
 	/* Now do the network interfaces. */
-	for (i = 0; i < SUME_NPORTS; i++) {
-		error = sume_ifp_alloc(adapter, i);
-		if (error != 0)
-			goto error;
-	}
+	for (i = 0; i < SUME_NPORTS; i++)
+		sume_ifp_alloc(adapter, i);
 
 	/*  Register stats and register sysctls. */
 	sume_sysctl_init(adapter);
diff --git a/sys/dev/ti/if_ti.c b/sys/dev/ti/if_ti.c
--- a/sys/dev/ti/if_ti.c
+++ b/sys/dev/ti/if_ti.c
@@ -2384,11 +2384,6 @@
 	callout_init_mtx(&sc->ti_watchdog, &sc->ti_mtx, 0);
 	ifmedia_init(&sc->ifmedia, IFM_IMASK, ti_ifmedia_upd, ti_ifmedia_sts);
 	ifp = sc->ti_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_sethwassist(ifp, TI_CSUM_FEATURES);
 	if_setcapabilities(ifp, IFCAP_TXCSUM | IFCAP_RXCSUM);
 	if_setcapenable(ifp, if_getcapabilities(sc->ti_ifp));
diff --git a/sys/dev/tsec/if_tsec.c b/sys/dev/tsec/if_tsec.c
--- a/sys/dev/tsec/if_tsec.c
+++ b/sys/dev/tsec/if_tsec.c
@@ -239,12 +239,6 @@
 
 	/* Create network interface for upper layers */
 	ifp = sc->tsec_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(sc->dev, "if_alloc() failed\n");
-		tsec_detach(sc);
-		return (ENOMEM);
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));
 	if_setflags(ifp, IFF_SIMPLEX | IFF_MULTICAST | IFF_BROADCAST);
diff --git a/sys/dev/usb/net/if_usie.c b/sys/dev/usb/net/if_usie.c
--- a/sys/dev/usb/net/if_usie.c
+++ b/sys/dev/usb/net/if_usie.c
@@ -430,11 +430,6 @@
 
 	/* setup ifnet (Direct IP) */
 	sc->sc_ifp = ifp = if_alloc(IFT_OTHER);
-
-	if (ifp == NULL) {
-		device_printf(self, "Could not allocate a network interface\n");
-		goto detach;
-	}
 	if_initname(ifp, "usie", device_get_unit(self));
 
 	if_setsoftc(ifp, sc);
diff --git a/sys/dev/usb/net/uhso.c b/sys/dev/usb/net/uhso.c
--- a/sys/dev/usb/net/uhso.c
+++ b/sys/dev/usb/net/uhso.c
@@ -1566,10 +1566,6 @@
 	}
 
 	sc->sc_ifp = ifp = if_alloc(IFT_OTHER);
-	if (sc->sc_ifp == NULL) {
-		device_printf(sc->sc_dev, "if_alloc() failed\n");
-		return (-1);
-	}
 
 	callout_init_mtx(&sc->sc_c, &sc->sc_mtx, 0);
 	mtx_lock(&sc->sc_mtx);
diff --git a/sys/dev/usb/net/usb_ethernet.c b/sys/dev/usb/net/usb_ethernet.c
--- a/sys/dev/usb/net/usb_ethernet.c
+++ b/sys/dev/usb/net/usb_ethernet.c
@@ -220,11 +220,6 @@
 	error = 0;
 	CURVNET_SET_QUIET(vnet0);
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(ue->ue_dev, "could not allocate ifnet\n");
-		goto fail;
-	}
-
 	if_setsoftc(ifp, ue);
 	if_initname(ifp, "ue", ue->ue_unit);
 	if (ue->ue_methods->ue_attach_post_sub != NULL) {
diff --git a/sys/dev/usb/usb_pf.c b/sys/dev/usb/usb_pf.c
--- a/sys/dev/usb/usb_pf.c
+++ b/sys/dev/usb/usb_pf.c
@@ -195,12 +195,6 @@
 		return (error);
 	}
 	ifp = ubus->ifp = if_alloc(IFT_USB);
-	if (ifp == NULL) {
-		ifc_free_unit(ifc, unit);
-		device_printf(ubus->parent, "usbpf: Could not allocate "
-		    "instance\n");
-		return (ENOSPC);
-	}
 	if_setsoftc(ifp, ubus);
 	if_initname(ifp, usbusname, unit);
 	if_setname(ifp, name);
diff --git a/sys/dev/vge/if_vge.c b/sys/dev/vge/if_vge.c
--- a/sys/dev/vge/if_vge.c
+++ b/sys/dev/vge/if_vge.c
@@ -1093,12 +1093,6 @@
 		goto fail;
 
 	ifp = sc->vge_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
-
 	vge_miipoll_start(sc);
 	/* Do MII setup */
 	error = mii_attach(dev, &sc->vge_miibus, ifp, vge_ifmedia_upd,
diff --git a/sys/dev/virtio/network/if_vtnet.c b/sys/dev/virtio/network/if_vtnet.c
--- a/sys/dev/virtio/network/if_vtnet.c
+++ b/sys/dev/virtio/network/if_vtnet.c
@@ -115,7 +115,7 @@
 static int	vtnet_alloc_rx_filters(struct vtnet_softc *);
 static void	vtnet_free_rx_filters(struct vtnet_softc *);
 static int	vtnet_alloc_virtqueues(struct vtnet_softc *);
-static int	vtnet_alloc_interface(struct vtnet_softc *);
+static void	vtnet_alloc_interface(struct vtnet_softc *);
 static int	vtnet_setup_interface(struct vtnet_softc *);
 static int	vtnet_ioctl_mtu(struct vtnet_softc *, u_int);
 static int	vtnet_ioctl_ifflags(struct vtnet_softc *);
@@ -437,12 +437,7 @@
 	callout_init_mtx(&sc->vtnet_tick_ch, VTNET_CORE_MTX(sc), 0);
 	vtnet_load_tunables(sc);
 
-	error = vtnet_alloc_interface(sc);
-	if (error) {
-		device_printf(dev, "cannot allocate interface\n");
-		goto fail;
-	}
-
+	vtnet_alloc_interface(sc);
 	vtnet_setup_sysctl(sc);
 
 	error = vtnet_setup_features(sc);
@@ -1069,7 +1064,7 @@
 	return (error);
 }
 
-static int
+static void
 vtnet_alloc_interface(struct vtnet_softc *sc)
 {
 	device_t dev;
@@ -1078,14 +1073,9 @@
 	dev = sc->vtnet_dev;
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		return (ENOMEM);
-
 	sc->vtnet_ifp = ifp;
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
-
-	return (0);
 }
 
 static int
diff --git a/sys/dev/vnic/nicvf_main.c b/sys/dev/vnic/nicvf_main.c
--- a/sys/dev/vnic/nicvf_main.c
+++ b/sys/dev/vnic/nicvf_main.c
@@ -139,7 +139,7 @@
 static int nicvf_rss_init(struct nicvf *);
 static int nicvf_init_resources(struct nicvf *);
 
-static int nicvf_setup_ifnet(struct nicvf *);
+static void nicvf_setup_ifnet(struct nicvf *);
 static int nicvf_setup_ifmedia(struct nicvf *);
 static void nicvf_hw_addr_random(uint8_t *);
 
@@ -247,11 +247,7 @@
 		nicvf_rss_init(nic);
 	NICVF_CORE_UNLOCK(nic);
 
-	err = nicvf_setup_ifnet(nic);
-	if (err != 0) {
-		device_printf(dev, "Could not set-up ifnet\n");
-		goto err_release_intr;
-	}
+	nicvf_setup_ifnet(nic);
 
 	err = nicvf_setup_ifmedia(nic);
 	if (err != 0) {
@@ -329,17 +325,12 @@
 	memcpy(hwaddr, addr, ETHER_ADDR_LEN);
 }
 
-static int
+static void
 nicvf_setup_ifnet(struct nicvf *nic)
 {
 	if_t ifp;
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(nic->dev, "Could not allocate ifnet structure\n");
-		return (ENOMEM);
-	}
-
 	nic->ifp = ifp;
 
 	if_setsoftc(ifp, nic);
@@ -379,8 +370,6 @@
 	if (nic->hw_tso)
 		if_sethwassistbits(ifp, (CSUM_TSO), 0);
 	if_setcapenable(ifp, if_getcapabilities(ifp));
-
-	return (0);
 }
 
 static int
diff --git a/sys/dev/vnic/thunder_mdio.c b/sys/dev/vnic/thunder_mdio.c
--- a/sys/dev/vnic/thunder_mdio.c
+++ b/sys/dev/vnic/thunder_mdio.c
@@ -453,10 +453,6 @@
 		if (pd == NULL)
 			return (ENOMEM);
 		pd->ifp = if_alloc(IFT_ETHER);
-		if (pd->ifp == NULL) {
-			free(pd, M_THUNDER_MDIO);
-			return (ENOMEM);
-		}
 		pd->lmacid = lmacid;
 	}
 
diff --git a/sys/dev/vr/if_vr.c b/sys/dev/vr/if_vr.c
--- a/sys/dev/vr/if_vr.c
+++ b/sys/dev/vr/if_vr.c
@@ -656,11 +656,6 @@
 
 	/* Allocate ifnet structure. */
 	ifp = sc->vr_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "couldn't allocate ifnet structure\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/vte/if_vte.c b/sys/dev/vte/if_vte.c
--- a/sys/dev/vte/if_vte.c
+++ b/sys/dev/vte/if_vte.c
@@ -435,12 +435,6 @@
 	vte_get_macaddr(sc);
 
 	ifp = sc->vte_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "cannot allocate ifnet structure.\n");
-		error = ENXIO;
-		goto fail;
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/xilinx/if_xae.c b/sys/dev/xilinx/if_xae.c
--- a/sys/dev/xilinx/if_xae.c
+++ b/sys/dev/xilinx/if_xae.c
@@ -990,11 +990,6 @@
 
 	/* Set up the ethernet interface. */
 	sc->ifp = ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "could not allocate ifp.\n");
-		return (ENXIO);
-	}
-
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 	if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
diff --git a/sys/dev/xl/if_xl.c b/sys/dev/xl/if_xl.c
--- a/sys/dev/xl/if_xl.c
+++ b/sys/dev/xl/if_xl.c
@@ -1188,11 +1188,6 @@
 
 	/* Initialize interface name. */
 	ifp = sc->xl_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
 	if_setsoftc(ifp, sc);
 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 
diff --git a/sys/net/if_bridge.c b/sys/net/if_bridge.c
--- a/sys/net/if_bridge.c
+++ b/sys/net/if_bridge.c
@@ -754,10 +754,6 @@
 
 	sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
 	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		free(sc, M_DEVBUF);
-		return (ENOSPC);
-	}
 
 	BRIDGE_LOCK_INIT(sc);
 	sc->sc_brtmax = BRIDGE_RTABLE_MAX;
diff --git a/sys/net/if_disc.c b/sys/net/if_disc.c
--- a/sys/net/if_disc.c
+++ b/sys/net/if_disc.c
@@ -85,11 +85,6 @@
 
 	sc = malloc(sizeof(struct disc_softc), M_DISC, M_WAITOK | M_ZERO);
 	ifp = sc->sc_ifp = if_alloc(IFT_LOOP);
-	if (ifp == NULL) {
-		free(sc, M_DISC);
-		return (ENOSPC);
-	}
-
 	ifp->if_softc = sc;
 	if_initname(ifp, discname, unit);
 	ifp->if_mtu = DSMTU;
diff --git a/sys/net/if_edsc.c b/sys/net/if_edsc.c
--- a/sys/net/if_edsc.c
+++ b/sys/net/if_edsc.c
@@ -102,11 +102,6 @@
 	 */
 	sc = malloc(sizeof(struct edsc_softc), M_EDSC, M_WAITOK | M_ZERO);
 	ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		free(sc, M_EDSC);
-		return (ENOSPC);
-	}
-
 	ifp->if_softc = sc;
 
 	/*
diff --git a/sys/net/if_enc.c b/sys/net/if_enc.c
--- a/sys/net/if_enc.c
+++ b/sys/net/if_enc.c
@@ -163,10 +163,6 @@
 	sc = malloc(sizeof(struct enc_softc), M_DEVBUF,
 	    M_WAITOK | M_ZERO);
 	ifp = sc->sc_ifp = if_alloc(IFT_ENC);
-	if (ifp == NULL) {
-		free(sc, M_DEVBUF);
-		return (ENOSPC);
-	}
 	if (V_enc_sc != NULL) {
 		if_free(ifp);
 		free(sc, M_DEVBUF);
diff --git a/sys/net/if_epair.c b/sys/net/if_epair.c
--- a/sys/net/if_epair.c
+++ b/sys/net/if_epair.c
@@ -516,9 +516,6 @@
 	struct epair_softc *sc;
 
 	struct ifnet *ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL)
-		return (NULL);
-
 	sc = malloc(sizeof(struct epair_softc), M_EPAIR, M_WAITOK | M_ZERO);
 	sc->ifp = ifp;
 	sc->num_queues = epair_tasks.tasks;
@@ -614,8 +611,6 @@
 static void
 epair_free_sc(struct epair_softc *sc)
 {
-	if (sc == NULL)
-		return;
 
 	if_free(sc->ifp);
 	ifmedia_removeall(&sc->media);
@@ -714,12 +709,6 @@
 	/* Allocate memory for both [ab] interfaces */
 	sca = epair_alloc_sc(ifc);
 	scb = epair_alloc_sc(ifc);
-	if (sca == NULL || scb == NULL) {
-		epair_free_sc(sca);
-		epair_free_sc(scb);
-		ifc_free_unit(ifc, unit);
-		return (ENOSPC);
-	}
 
 	/*
 	 * Cross-reference the interfaces so we will be able to free both.
diff --git a/sys/net/if_lagg.c b/sys/net/if_lagg.c
--- a/sys/net/if_lagg.c
+++ b/sys/net/if_lagg.c
@@ -536,10 +536,6 @@
 
 	sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK | M_ZERO);
 	ifp = sc->sc_ifp = if_alloc(if_type);
-	if (ifp == NULL) {
-		free(sc, M_LAGG);
-		return (ENOSPC);
-	}
 	LAGG_SX_INIT(sc);
 
 	mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF);
diff --git a/sys/net/if_loop.c b/sys/net/if_loop.c
--- a/sys/net/if_loop.c
+++ b/sys/net/if_loop.c
@@ -123,9 +123,6 @@
 	struct ifnet *ifp;
 
 	ifp = if_alloc(IFT_LOOP);
-	if (ifp == NULL)
-		return (ENOSPC);
-
 	if_initname(ifp, loname, ifd->unit);
 	ifp->if_mtu = LOMTU;
 	ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
diff --git a/sys/net/if_stf.c b/sys/net/if_stf.c
--- a/sys/net/if_stf.c
+++ b/sys/net/if_stf.c
@@ -264,11 +264,6 @@
 
 	sc = malloc(sizeof(struct stf_softc), M_STF, M_WAITOK | M_ZERO);
 	ifp = STF2IFP(sc) = if_alloc(IFT_STF);
-	if (ifp == NULL) {
-		free(sc, M_STF);
-		ifc_free_unit(ifc, unit);
-		return (ENOSPC);
-	}
 	ifp->if_softc = sc;
 	sc->sc_fibnum = curthread->td_proc->p_fibnum;
 
diff --git a/sys/net/if_tuntap.c b/sys/net/if_tuntap.c
--- a/sys/net/if_tuntap.c
+++ b/sys/net/if_tuntap.c
@@ -939,9 +939,6 @@
 		iflags |= IFF_POINTOPOINT;
 	}
 	ifp = tp->tun_ifp = if_alloc(type);
-	if (ifp == NULL)
-		panic("%s%d: failed to if_alloc() interface.\n",
-		    drv->cdevsw.d_name, dev2unit(dev));
 	ifp->if_softc = tp;
 	if_initname(ifp, drv->cdevsw.d_name, dev2unit(dev));
 	ifp->if_ioctl = tunifioctl;
diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c
--- a/sys/net/if_vlan.c
+++ b/sys/net/if_vlan.c
@@ -1163,14 +1163,6 @@
 
 	ifv = malloc(sizeof(struct ifvlan), M_VLAN, M_WAITOK | M_ZERO);
 	ifp = ifv->ifv_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		if (!subinterface)
-			ifc_free_unit(ifc, unit);
-		free(ifv, M_VLAN);
-		if (p != NULL)
-			if_rele(p);
-		return (ENOSPC);
-	}
 	CK_SLIST_INIT(&ifv->vlan_mc_listhead);
 	ifp->if_softc = ifv;
 	/*
diff --git a/sys/net/if_vxlan.c b/sys/net/if_vxlan.c
--- a/sys/net/if_vxlan.c
+++ b/sys/net/if_vxlan.c
@@ -3248,11 +3248,6 @@
 	}
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		error = ENOSPC;
-		goto fail;
-	}
-
 	sc->vxl_ifp = ifp;
 	rm_init(&sc->vxl_lock, "vxlanrm");
 	callout_init_rw(&sc->vxl_callout, &sc->vxl_lock, 0);
diff --git a/sys/net/iflib.c b/sys/net/iflib.c
--- a/sys/net/iflib.c
+++ b/sys/net/iflib.c
@@ -5751,10 +5751,6 @@
 	CTX_LOCK_INIT(ctx);
 	STATE_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev));
 	ifp = ctx->ifc_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not allocate ifnet structure\n");
-		return (ENOMEM);
-	}
 
 	/*
 	 * Initialize our context's device specific methods
diff --git a/sys/net80211/ieee80211.c b/sys/net80211/ieee80211.c
--- a/sys/net80211/ieee80211.c
+++ b/sys/net80211/ieee80211.c
@@ -562,10 +562,6 @@
 	struct ifnet *ifp;
 
 	ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		ic_printf(ic, "%s: unable to allocate ifnet\n", __func__);
-		return ENOMEM;
-	}
 	if_initname(ifp, name, unit);
 	ifp->if_softc = vap;			/* back pointer */
 	ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
diff --git a/sys/netgraph/ng_eiface.c b/sys/netgraph/ng_eiface.c
--- a/sys/netgraph/ng_eiface.c
+++ b/sys/netgraph/ng_eiface.c
@@ -388,12 +388,7 @@
 
 	/* Allocate node and interface private structures */
 	priv = malloc(sizeof(*priv), M_NETGRAPH, M_WAITOK | M_ZERO);
-
 	ifp = priv->ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		free(priv, M_NETGRAPH);
-		return (ENOSPC);
-	}
 
 	/* Link them together */
 	ifp->if_softc = priv;
diff --git a/sys/netgraph/ng_iface.c b/sys/netgraph/ng_iface.c
--- a/sys/netgraph/ng_iface.c
+++ b/sys/netgraph/ng_iface.c
@@ -524,10 +524,6 @@
 	/* Allocate node and interface private structures */
 	priv = malloc(sizeof(*priv), M_NETGRAPH_IFACE, M_WAITOK | M_ZERO);
 	ifp = if_alloc(IFT_PROPVIRTUAL);
-	if (ifp == NULL) {
-		free(priv, M_NETGRAPH_IFACE);
-		return (ENOMEM);
-	}
 
 	rm_init(&priv->lock, "ng_iface private rmlock");
 
diff --git a/sys/netpfil/ipfw/ip_fw_bpf.c b/sys/netpfil/ipfw/ip_fw_bpf.c
--- a/sys/netpfil/ipfw/ip_fw_bpf.c
+++ b/sys/netpfil/ipfw/ip_fw_bpf.c
@@ -95,8 +95,6 @@
 	struct ifnet *ifp;
 
 	ifp = if_alloc(IFT_PFLOG);
-	if (ifp == NULL)
-		return (ENOSPC);
 	if_initname(ifp, ipfwname, unit);
 	ifp->if_flags = IFF_UP | IFF_SIMPLEX | IFF_MULTICAST;
 	ifp->if_mtu = 65536;
@@ -121,8 +119,6 @@
 	struct ifnet *ifp;
 
 	ifp = if_alloc(IFT_PFLOG);
-	if (ifp == NULL)
-		return (ENOSPC);
 	if_initname(ifp, ipfwlogname, unit);
 	ifp->if_flags = IFF_UP | IFF_SIMPLEX | IFF_MULTICAST;
 	ifp->if_mtu = 65536;
diff --git a/sys/netpfil/pf/if_pflog.c b/sys/netpfil/pf/if_pflog.c
--- a/sys/netpfil/pf/if_pflog.c
+++ b/sys/netpfil/pf/if_pflog.c
@@ -129,9 +129,6 @@
 		return (EINVAL);
 
 	ifp = if_alloc(IFT_PFLOG);
-	if (ifp == NULL) {
-		return (ENOSPC);
-	}
 	if_initname(ifp, pflogname, ifd->unit);
 	ifp->if_mtu = PFLOGMTU;
 	ifp->if_ioctl = pflogioctl;
diff --git a/sys/netpfil/pf/if_pfsync.c b/sys/netpfil/pf/if_pfsync.c
--- a/sys/netpfil/pf/if_pfsync.c
+++ b/sys/netpfil/pf/if_pfsync.c
@@ -396,10 +396,6 @@
 	sc->sc_version = PFSYNC_MSG_VERSION_DEFAULT;
 
 	ifp = sc->sc_ifp = if_alloc(IFT_PFSYNC);
-	if (ifp == NULL) {
-		free(sc, M_PFSYNC);
-		return (ENOSPC);
-	}
 	if_initname(ifp, pfsyncname, unit);
 	ifp->if_softc = sc;
 	ifp->if_ioctl = pfsyncioctl;
diff --git a/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c b/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c
--- a/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -906,10 +906,6 @@
 
 	priv = ipoib_priv_alloc();
 	dev = priv->dev = if_alloc(IFT_INFINIBAND);
-	if (!dev) {
-		free(priv, M_TEMP);
-		return NULL;
-	}
 	if_setsoftc(dev, priv);
 	priv->gone = 2; /* initializing */
 	priv->unit = alloc_unr(ipoib_unrhdr);