From 4e70215e6bf590140205774753c8b0a1f1fe9a36 Mon Sep 17 00:00:00 2001
From: imp <imp@FreeBSD.org>
Date: Mon, 19 Sep 2005 03:10:21 +0000
Subject: Make sure that we call if_free(ifp) after bus_teardown_intr.  Since
 we could get an interrupt after we free the ifp, and the interrupt handler
 depended on the ifp being still alive, this could, in theory, cause a crash. 
 Eliminate this possibility by moving the if_free to after the
 bus_teardown_intr() call.

---
 sys/dev/an/if_an.c          |  2 +-
 sys/dev/arl/if_arl_isa.c    |  2 +-
 sys/dev/awi/if_awi_pccard.c |  4 +---
 sys/dev/cm/if_cm_isa.c      |  2 +-
 sys/dev/cnw/if_cnw.c        |  2 +-
 sys/dev/cp/if_cp.c          |  5 +++--
 sys/dev/cs/if_cs.c          |  2 +-
 sys/dev/ed/if_ed.c          |  2 +-
 sys/dev/em/if_em.c          |  4 +++-
 sys/dev/en/if_en_pci.c      |  2 +-
 sys/dev/ep/if_ep.c          |  2 +-
 sys/dev/fe/if_fe_pccard.c   |  2 +-
 sys/dev/if_ndis/if_ndis.c   |  5 +++--
 sys/dev/ipw/if_ipw.c        |  3 ++-
 sys/dev/iwi/if_iwi.c        |  3 ++-
 sys/dev/ixgb/if_ixgb.c      |  5 +++--
 sys/dev/lge/if_lge.c        |  2 +-
 sys/dev/nge/if_nge.c        |  2 +-
 sys/dev/nve/if_nve.c        |  6 +++---
 sys/dev/ral/if_ral.c        |  2 +-
 sys/dev/ray/if_ray.c        |  2 +-
 sys/dev/re/if_re.c          |  4 ++--
 sys/dev/sbsh/if_sbsh.c      |  3 ++-
 sys/dev/sio/sio_pccard.c    | 30 +++++++++---------------------
 sys/dev/sn/if_sn.c          |  2 +-
 sys/dev/tx/if_tx.c          |  1 -
 sys/dev/txp/if_txp.c        |  6 +++---
 sys/dev/vge/if_vge.c        |  4 ++--
 sys/dev/wi/if_wi.c          |  2 +-
 sys/dev/wl/if_wl.c          |  2 +-
 sys/dev/xe/if_xe_pccard.c   |  2 +-
 31 files changed, 55 insertions(+), 62 deletions(-)

(limited to 'sys')

diff --git a/sys/dev/an/if_an.c b/sys/dev/an/if_an.c
index f10f30e..23f94ed 100644
--- a/sys/dev/an/if_an.c
+++ b/sys/dev/an/if_an.c
@@ -837,8 +837,8 @@ an_detach(device_t dev)
 	ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 	AN_UNLOCK(sc);
 	ether_ifdetach(ifp);
-	if_free(ifp);
 	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
+	if_free(ifp);
 	an_release_resources(dev);
 	mtx_destroy(&sc->an_mtx);
 	return (0);
diff --git a/sys/dev/arl/if_arl_isa.c b/sys/dev/arl/if_arl_isa.c
index e318adf..fa84396 100644
--- a/sys/dev/arl/if_arl_isa.c
+++ b/sys/dev/arl/if_arl_isa.c
@@ -324,13 +324,13 @@ arl_isa_detach(device_t dev)
 
 	arl_stop(sc);
 	ifmedia_removeall(&sc->arl_ifmedia);
+	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
 #if __FreeBSD_version < 500100
 	ether_ifdetach(sc->arl_ifp, ETHER_BPF_SUPPORTED);
 #else
 	ether_ifdetach(sc->arl_ifp);
 	if_free(sc->arl_ifp);
 #endif
-	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
 	arl_release_resources(dev);
 
 	return (0);
diff --git a/sys/dev/awi/if_awi_pccard.c b/sys/dev/awi/if_awi_pccard.c
index bc8bb32..0e4958c 100644
--- a/sys/dev/awi/if_awi_pccard.c
+++ b/sys/dev/awi/if_awi_pccard.c
@@ -153,8 +153,7 @@ awi_pccard_attach(device_t dev)
 
 	psc->sc_port_rid = 0;
 	psc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
-	    &psc->sc_port_rid, 0, ~0, 16,
-	    rman_make_alignment_flags(64) | RF_ACTIVE);
+	    &psc->sc_port_rid, 0, ~0, 16, RF_ACTIVE);
 	if (!psc->sc_port_res) {
 		device_printf(dev, "awi_pccard_attach: port alloc failed\n");
 		goto fail;
@@ -176,7 +175,6 @@ awi_pccard_attach(device_t dev)
 	 * XXX: awi needs to access memory with 8bit,
 	 * but pccardd apparently maps memory with MDF_16BITS flag.
 	 * So memory mapped access is disabled and use IO port instead.
-	 * Also, memory mapping is not yet supported on pccard.
 	 */
 	psc->sc_mem_res = 0;
 #else
diff --git a/sys/dev/cm/if_cm_isa.c b/sys/dev/cm/if_cm_isa.c
index 1baa687..0eb070c 100644
--- a/sys/dev/cm/if_cm_isa.c
+++ b/sys/dev/cm/if_cm_isa.c
@@ -111,10 +111,10 @@ cm_isa_detach(device_t dev)
 
 	s = splimp();
 	arc_ifdetach(ifp);
-	if_free(ifp);
 	splx(s);
 
 	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
+	if_free(ifp);
 	cm_release_resources(dev);
 
 	return (0);
diff --git a/sys/dev/cnw/if_cnw.c b/sys/dev/cnw/if_cnw.c
index 5db732d..b2b99c1 100644
--- a/sys/dev/cnw/if_cnw.c
+++ b/sys/dev/cnw/if_cnw.c
@@ -1599,8 +1599,8 @@ static int cnw_pccard_detach(dev)
 	cnw_stop(sc);
 
 	ether_ifdetach(ifp);
-	if_free(ifp);
 	cnw_free(dev);
+	if_free(ifp);
 	sc->cnw_gone = 1;
 
 #if 0
diff --git a/sys/dev/cp/if_cp.c b/sys/dev/cp/if_cp.c
index ab24f6f..f6ecd74 100644
--- a/sys/dev/cp/if_cp.c
+++ b/sys/dev/cp/if_cp.c
@@ -1438,6 +1438,9 @@ static int cp_detach (device_t dev)
 	cp_reset (b, 0 ,0);
 	callout_stop (&led_timo[b->num]);
 
+	/* Disable the interrupt request. */
+	bus_teardown_intr (dev, bd->cp_irq, bd->cp_intrhand);
+
 	for (c=b->chan; c<b->chan+NCHAN; ++c) {
 		drv_t *d = (drv_t*) c->sys;
 
@@ -1470,8 +1473,6 @@ static int cp_detach (device_t dev)
 	b->sys = NULL;
 	CP_UNLOCK (bd);
 
-	/* Disable the interrupt request. */
-	bus_teardown_intr (dev, bd->cp_irq, bd->cp_intrhand);
 	bus_deactivate_resource (dev, SYS_RES_IRQ, 0, bd->cp_irq);
 	bus_release_resource (dev, SYS_RES_IRQ, 0, bd->cp_irq);
 	bus_release_resource (dev, SYS_RES_MEMORY, PCIR_BAR(0), bd->cp_res);
diff --git a/sys/dev/cs/if_cs.c b/sys/dev/cs/if_cs.c
index afa3fb7..a55c4eb 100644
--- a/sys/dev/cs/if_cs.c
+++ b/sys/dev/cs/if_cs.c
@@ -696,8 +696,8 @@ cs_detach(device_t dev)
 	cs_stop(sc);
 	ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 	ether_ifdetach(ifp);
-	if_free(ifp);
 	cs_release_resources(dev);
+	if_free(ifp);
 	return (0);
 }
 
diff --git a/sys/dev/ed/if_ed.c b/sys/dev/ed/if_ed.c
index e76c0c8..0cbe2b3 100644
--- a/sys/dev/ed/if_ed.c
+++ b/sys/dev/ed/if_ed.c
@@ -369,8 +369,8 @@ ed_detach(device_t dev)
 	callout_drain(&sc->tick_ch);
 	ether_ifdetach(ifp);
 	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
-	if_free(ifp);
 	ed_release_resources(dev);
+	if_free(ifp);
 	ED_LOCK_DESTROY(sc);
 	return (0);
 }
diff --git a/sys/dev/em/if_em.c b/sys/dev/em/if_em.c
index 9d98158..3fa1180 100644
--- a/sys/dev/em/if_em.c
+++ b/sys/dev/em/if_em.c
@@ -535,10 +535,12 @@ em_detach(device_t dev)
         ether_ifdetach(adapter->ifp, ETHER_BPF_SUPPORTED);
 #else
         ether_ifdetach(adapter->ifp);
-	if_free(ifp);
 #endif
 	em_free_pci_resources(adapter);
 	bus_generic_detach(dev);
+#if __FreeBSD_version >= 500000
+	if_free(ifp);
+#endif
 
 	/* Free Transmit Descriptor ring */
         if (adapter->tx_desc_base) {
diff --git a/sys/dev/en/if_en_pci.c b/sys/dev/en/if_en_pci.c
index bfff233..c17e24d 100644
--- a/sys/dev/en/if_en_pci.c
+++ b/sys/dev/en/if_en_pci.c
@@ -321,7 +321,6 @@ en_pci_detach(device_t dev)
 	 */
 	en_reset(sc);
 	atm_ifdetach(sc->ifp);
-	if_free(sc->ifp);
 
 	/*
 	 * Deallocate resources.
@@ -334,6 +333,7 @@ en_pci_detach(device_t dev)
 	 * Free all the driver internal resources
 	 */
 	en_destroy(sc);
+	if_free(sc->ifp);
 
 	return (0);
 }
diff --git a/sys/dev/ep/if_ep.c b/sys/dev/ep/if_ep.c
index 3cf9623..1cb8c81 100644
--- a/sys/dev/ep/if_ep.c
+++ b/sys/dev/ep/if_ep.c
@@ -360,10 +360,10 @@ ep_detach(device_t dev)
 
 	ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 	ether_ifdetach(ifp);
-	if_free(ifp);
 
 	sc->gone = 1;
 	ep_free(dev);
+	if_free(ifp);
 	EP_LOCK_DESTROY(sc);
 
 	return (0);
diff --git a/sys/dev/fe/if_fe_pccard.c b/sys/dev/fe/if_fe_pccard.c
index a143e63..064e246 100644
--- a/sys/dev/fe/if_fe_pccard.c
+++ b/sys/dev/fe/if_fe_pccard.c
@@ -187,8 +187,8 @@ fe_pccard_detach(device_t dev)
 
 	fe_stop(sc);
 	ether_ifdetach(ifp);
-	if_free(ifp);
 	bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
+	if_free(ifp);
 	fe_release_resource(dev);
 
 	return 0;
diff --git a/sys/dev/if_ndis/if_ndis.c b/sys/dev/if_ndis/if_ndis.c
index 616887d..f22068e 100644
--- a/sys/dev/if_ndis/if_ndis.c
+++ b/sys/dev/if_ndis/if_ndis.c
@@ -885,8 +885,6 @@ ndis_detach(dev)
 			ether_ifdetach(ifp);
 	} else
 		NDIS_UNLOCK(sc);
-	if (ifp != NULL)
-		if_free(ifp);
 
 	bus_generic_detach(dev);
 
@@ -904,6 +902,9 @@ ndis_detach(dev)
 		bus_release_resource(dev, SYS_RES_MEMORY,
 		    sc->ndis_altmem_rid, sc->ndis_res_altmem);
 
+	if (ifp != NULL)
+		if_free(ifp);
+
 	if (sc->ndis_iftype == PCMCIABus)
 		ndis_free_amem(sc);
 
diff --git a/sys/dev/ipw/if_ipw.c b/sys/dev/ipw/if_ipw.c
index 4a33fa6..1f9fd07 100644
--- a/sys/dev/ipw/if_ipw.c
+++ b/sys/dev/ipw/if_ipw.c
@@ -391,7 +391,6 @@ ipw_detach(device_t dev)
 	if (ifp != NULL) {
 		bpfdetach(ifp);
 		ieee80211_ifdetach(ic);
-		if_free(ifp);
 	}
 
 	ipw_release(sc);
@@ -403,6 +402,8 @@ ipw_detach(device_t dev)
 
 	if (sc->mem != NULL)
 		bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
+	if (ifp != NULL)
+		if_free(ifp);
 
 	mtx_destroy(&sc->sc_mtx);
 
diff --git a/sys/dev/iwi/if_iwi.c b/sys/dev/iwi/if_iwi.c
index 420d2ae..d353a03 100644
--- a/sys/dev/iwi/if_iwi.c
+++ b/sys/dev/iwi/if_iwi.c
@@ -467,7 +467,6 @@ iwi_detach(device_t dev)
 	if (ifp != NULL) {
 		bpfdetach(ifp);
 		ieee80211_ifdetach(ic);
-		if_free(ifp);
 	}
 
 	iwi_free_cmd_ring(sc, &sc->cmdq);
@@ -485,6 +484,8 @@ iwi_detach(device_t dev)
 	if (sc->mem != NULL)
 		bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
 
+	if (ifp != NULL)
+		if_free(ifp);
 	mtx_destroy(&sc->sc_mtx);
 
 	return 0;
diff --git a/sys/dev/ixgb/if_ixgb.c b/sys/dev/ixgb/if_ixgb.c
index 6453262..4cb9caa 100644
--- a/sys/dev/ixgb/if_ixgb.c
+++ b/sys/dev/ixgb/if_ixgb.c
@@ -378,10 +378,11 @@ ixgb_detach(device_t dev)
 	ether_ifdetach(adapter->ifp, ETHER_BPF_SUPPORTED);
 #else
 	ether_ifdetach(adapter->ifp);
-	if_free(adapter->ifp);
 #endif
 	ixgb_free_pci_resources(adapter);
-
+#if __FreeBSD_version >= 500000
+	if_free(adapter->ifp);
+#endif
 
 	/* Free Transmit Descriptor ring */
 	if (adapter->tx_desc_base) {
diff --git a/sys/dev/lge/if_lge.c b/sys/dev/lge/if_lge.c
index f1d73d4..9ba8542 100644
--- a/sys/dev/lge/if_lge.c
+++ b/sys/dev/lge/if_lge.c
@@ -627,7 +627,6 @@ lge_detach(dev)
 	lge_reset(sc);
 	lge_stop(sc);
 	ether_ifdetach(ifp);
-	if_free(ifp);
 
 	bus_generic_detach(dev);
 	device_delete_child(dev, sc->lge_miibus);
@@ -637,6 +636,7 @@ lge_detach(dev)
 	bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
 
 	contigfree(sc->lge_ldata, sizeof(struct lge_list_data), M_DEVBUF);
+	if_free(ifp);
 	lge_free_jumbo_mem(sc);
 
 	splx(s);
diff --git a/sys/dev/nge/if_nge.c b/sys/dev/nge/if_nge.c
index 88ded49..a14d4ef 100644
--- a/sys/dev/nge/if_nge.c
+++ b/sys/dev/nge/if_nge.c
@@ -963,7 +963,6 @@ nge_detach(dev)
 	nge_stop(sc);
 	NGE_UNLOCK(sc);
 	ether_ifdetach(ifp);
-	if_free(ifp);
 
 	bus_generic_detach(dev);
 	if (!sc->nge_tbi) {
@@ -974,6 +973,7 @@ nge_detach(dev)
 	bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
 
 	contigfree(sc->nge_ldata, sizeof(struct nge_list_data), M_DEVBUF);
+	if_free(ifp);
 
 	NGE_LOCK_DESTROY(sc);
 
diff --git a/sys/dev/nve/if_nve.c b/sys/dev/nve/if_nve.c
index 0d8267a..6ffecbd 100644
--- a/sys/dev/nve/if_nve.c
+++ b/sys/dev/nve/if_nve.c
@@ -559,12 +559,10 @@ nve_detach(device_t dev)
 
 	if (device_is_attached(dev)) {
 		nve_stop(sc);
+		/* XXX shouldn't hold lock over call to ether_ifdetch */
 		ether_ifdetach(ifp);
 	}
 
-	if (ifp)
-		if_free(ifp);
-
 	if (sc->miibus)
 		device_delete_child(dev, sc->miibus);
 	bus_generic_detach(dev);
@@ -601,6 +599,8 @@ nve_detach(device_t dev)
 		bus_dma_tag_destroy(sc->rtag);
 
 	NVE_UNLOCK(sc);
+	if (ifp)
+		if_free(ifp);
 	mtx_destroy(&sc->mtx);
 	mtx_destroy(&sc->osmtx);
 
diff --git a/sys/dev/ral/if_ral.c b/sys/dev/ral/if_ral.c
index b7b7316..acc7daf 100644
--- a/sys/dev/ral/if_ral.c
+++ b/sys/dev/ral/if_ral.c
@@ -531,7 +531,6 @@ ral_detach(device_t dev)
 
 	bpfdetach(ifp);
 	ieee80211_ifdetach(ic);
-	if_free(ifp);
 
 	ral_free_tx_ring(sc, &sc->txq);
 	ral_free_tx_ring(sc, &sc->atimq);
@@ -540,6 +539,7 @@ ral_detach(device_t dev)
 	ral_free_rx_ring(sc, &sc->rxq);
 
 	bus_teardown_intr(dev, sc->irq, sc->sc_ih);
+	if_free(ifp);
 	ral_free(dev);
 
 	mtx_destroy(&sc->sc_mtx);
diff --git a/sys/dev/ray/if_ray.c b/sys/dev/ray/if_ray.c
index 9ea6680..adc48beb 100644
--- a/sys/dev/ray/if_ray.c
+++ b/sys/dev/ray/if_ray.c
@@ -604,7 +604,6 @@ ray_detach(device_t dev)
 	sc->sc_c.np_havenet = 0;
 	ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 	ether_ifdetach(ifp);
-	if_free(ifp);
 
 	/*
 	 * Stop the runq and wake up anyone sleeping for us.
@@ -627,6 +626,7 @@ ray_detach(device_t dev)
 	 * Release resources
 	 */
 	ray_res_release(sc);
+	if_free(ifp);
 	RAY_DPRINTF(sc, RAY_DBG_STOP, "unloading complete");
 
 	splx(s);
diff --git a/sys/dev/re/if_re.c b/sys/dev/re/if_re.c
index 7a9aec1..81e26cb 100644
--- a/sys/dev/re/if_re.c
+++ b/sys/dev/re/if_re.c
@@ -1303,10 +1303,10 @@ re_detach(dev)
 	 * stopped here.
 	 */
 
-	if (ifp != NULL)
-		if_free(ifp);
 	if (sc->rl_intrhand)
 		bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand);
+	if (ifp != NULL)
+		if_free(ifp);
 	if (sc->rl_irq)
 		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq);
 	if (sc->rl_res)
diff --git a/sys/dev/sbsh/if_sbsh.c b/sys/dev/sbsh/if_sbsh.c
index 03cff46..32b15aa 100644
--- a/sys/dev/sbsh/if_sbsh.c
+++ b/sys/dev/sbsh/if_sbsh.c
@@ -311,12 +311,13 @@ sbsh_detach(device_t dev)
 
 	sbsh_stop(sc);
 	ether_ifdetach(ifp);
-	if_free(ifp);
 
 	bus_teardown_intr(dev, sc->irq_res, sc->intr_hand);
 	bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
 	bus_release_resource(dev, SYS_RES_MEMORY, PCIR_BAR(1), sc->mem_res);
 
+	if_free(ifp);
+
 	splx(s);
 	return (0);
 }
diff --git a/sys/dev/sio/sio_pccard.c b/sys/dev/sio/sio_pccard.c
index b715828..5c2ba77 100644
--- a/sys/dev/sio/sio_pccard.c
+++ b/sys/dev/sio/sio_pccard.c
@@ -44,23 +44,15 @@ __FBSDID("$FreeBSD$");
 
 #include <dev/sio/siovar.h>
 
-#include "pccarddevs.h"
-
 static	int	sio_pccard_attach(device_t dev);
-static	int	sio_pccard_match(device_t self);
 static	int	sio_pccard_probe(device_t dev);
 
 static device_method_t sio_pccard_methods[] = {
 	/* Device interface */
-	DEVMETHOD(device_probe,		pccard_compat_probe),
-	DEVMETHOD(device_attach,	pccard_compat_attach),
+	DEVMETHOD(device_probe,		sio_pccard_probe),
+	DEVMETHOD(device_attach,	sio_pccard_attach),
 	DEVMETHOD(device_detach,	siodetach),
 
-	/* Card interface */
-	DEVMETHOD(card_compat_match,	sio_pccard_match),
-	DEVMETHOD(card_compat_probe,	sio_pccard_probe),
-	DEVMETHOD(card_compat_attach,	sio_pccard_attach),
-
 	{ 0, 0 }
 };
 
@@ -71,7 +63,7 @@ static driver_t sio_pccard_driver = {
 };
 
 static int
-sio_pccard_match(device_t dev)
+sio_pccard_probe(device_t dev)
 {
 	int		error = 0;
 	u_int32_t	fcn = PCCARD_FUNCTION_UNSPEC;
@@ -79,6 +71,7 @@ sio_pccard_match(device_t dev)
 	error = pccard_get_function(dev, &fcn);
 	if (error != 0)
 		return (error);
+
 	/*
 	 * If a serial card, we are likely the right driver.  However,
 	 * some serial cards are better servered by other drivers, so
@@ -86,27 +79,22 @@ sio_pccard_match(device_t dev)
 	 */
 	if (fcn == PCCARD_FUNCTION_SERIAL)
 		return (-100);
-
-	return(ENXIO);
+	return (ENXIO);
 }
 
 static int
-sio_pccard_probe(dev)
+sio_pccard_attach(dev)
 	device_t	dev;
 {
+	int err;
 
 #ifdef PC98
 	SET_FLAG(dev, SET_IFTYPE(COM_IF_MODEM_CARD));
 #endif
 	/* Do not probe IRQ - pccard doesn't turn on the interrupt line */
 	/* until bus_setup_intr */
-	return (sioprobe(dev, 0, 0UL, 1));
-}
-
-static int
-sio_pccard_attach(dev)
-	device_t	dev;
-{
+	if ((err = sioprobe(dev, 0, 0UL, 1)) != 0)
+		return (err);
 	return (sioattach(dev, 0, 0UL));
 }
 
diff --git a/sys/dev/sn/if_sn.c b/sys/dev/sn/if_sn.c
index b4dbd2e..bb3fc5e 100644
--- a/sys/dev/sn/if_sn.c
+++ b/sys/dev/sn/if_sn.c
@@ -233,8 +233,8 @@ sn_detach(device_t dev)
 	snstop(sc);
 	ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 
 	ether_ifdetach(ifp);
-	if_free(ifp);
 	sn_deactivate(dev);
+	if_free(ifp);
 	SN_LOCK_DESTROY(sc);
 	return 0;
 }
diff --git a/sys/dev/tx/if_tx.c b/sys/dev/tx/if_tx.c
index 34b26ec..ce2da96 100644
--- a/sys/dev/tx/if_tx.c
+++ b/sys/dev/tx/if_tx.c
@@ -446,7 +446,6 @@ fail:
 static void
 epic_release(epic_softc_t *sc)
 {
-
 	if (sc->ifp != NULL)
 		if_free(sc->ifp);
 	if (sc->irq)
diff --git a/sys/dev/txp/if_txp.c b/sys/dev/txp/if_txp.c
index 0a35070..03bd0b4 100644
--- a/sys/dev/txp/if_txp.c
+++ b/sys/dev/txp/if_txp.c
@@ -392,9 +392,6 @@ txp_release_resources(sc)
 
 	dev = sc->sc_dev;
 
-	if (sc->sc_ifp)
-		if_free(sc->sc_ifp);
-
 	if (sc->sc_intrhand != NULL)
 		bus_teardown_intr(dev, sc->sc_irq, sc->sc_intrhand);
 
@@ -407,6 +404,9 @@ txp_release_resources(sc)
 	if (sc->sc_ldata != NULL)
 		contigfree(sc->sc_ldata, sizeof(struct txp_ldata), M_DEVBUF);
 
+	if (sc->sc_ifp)
+		if_free(sc->sc_ifp);
+
 	return;
 }
 
diff --git a/sys/dev/vge/if_vge.c b/sys/dev/vge/if_vge.c
index 60d8cdc..0780bc5 100644
--- a/sys/dev/vge/if_vge.c
+++ b/sys/dev/vge/if_vge.c
@@ -1123,8 +1123,6 @@ vge_detach(dev)
 		ifp->if_flags &= ~IFF_UP;
 		ether_ifdetach(ifp);
 	}
-	if (ifp)
-		if_free(ifp);
 	if (sc->vge_miibus)
 		device_delete_child(dev, sc->vge_miibus);
 	bus_generic_detach(dev);
@@ -1136,6 +1134,8 @@ vge_detach(dev)
 	if (sc->vge_res)
 		bus_release_resource(dev, SYS_RES_MEMORY,
 		    VGE_PCI_LOMEM, sc->vge_res);
+	if (ifp)
+		if_free(ifp);
 
 	/* Unload and free the RX DMA ring memory and map */
 
diff --git a/sys/dev/wi/if_wi.c b/sys/dev/wi/if_wi.c
index 21e7e50..a55bfb6 100644
--- a/sys/dev/wi/if_wi.c
+++ b/sys/dev/wi/if_wi.c
@@ -534,9 +534,9 @@ wi_detach(device_t dev)
 	bpfdetach(ifp);
 #endif
 	ieee80211_ifdetach(&sc->sc_ic);
-	if_free(sc->sc_ifp);
 	WI_UNLOCK(sc);
 	bus_teardown_intr(dev, sc->irq, sc->wi_intrhand);
+	if_free(sc->sc_ifp);
 	wi_free(dev);
 #if __FreeBSD_version >= 500000
 	mtx_destroy(&sc->sc_mtx);
diff --git a/sys/dev/wl/if_wl.c b/sys/dev/wl/if_wl.c
index f34915f..0df46ca 100644
--- a/sys/dev/wl/if_wl.c
+++ b/sys/dev/wl/if_wl.c
@@ -589,7 +589,6 @@ wldetach(device_t device)
 
     ifp = sc->ifp;
     ether_ifdetach(ifp);
-    if_free(ifp);
 
     WL_LOCK(sc);
 
@@ -607,6 +606,7 @@ wldetach(device_t device)
     bus_generic_detach(device);
     wl_deallocate_resources(device);
     WL_UNLOCK(sc);
+    if_free(ifp);
     mtx_destroy(&sc->wl_mtx);
     return (0);
 }
diff --git a/sys/dev/xe/if_xe_pccard.c b/sys/dev/xe/if_xe_pccard.c
index 4e6b2a4..48f1180 100644
--- a/sys/dev/xe/if_xe_pccard.c
+++ b/sys/dev/xe/if_xe_pccard.c
@@ -328,8 +328,8 @@ xe_pccard_detach(device_t dev)
 
 	sc->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 	ether_ifdetach(sc->ifp);
-	if_free(sc->ifp);
 	xe_deactivate(dev);
+	if_free(sc->ifp);
 	return (0);
 }
 
-- 
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