use shiny new m_defrag() and nitems() instead of rolling our own.

7 files changed, 25 insertions, 163 deletions

diff --git a/sys/dev/ic/rt2560.c b/sys/dev/ic/rt2560.c
index e8f9cafdf05..4981fc06a59 100644
--- a/sys/dev/ic/rt2560.c
+++ b/sys/dev/ic/rt2560.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rt2560.c,v 1.39 2008/08/27 09:05:03 damien Exp $  */
+/*	$OpenBSD: rt2560.c,v 1.40 2008/11/25 21:43:57 damien Exp $  */
 
 /*-
  * Copyright (c) 2005, 2006
@@ -1699,7 +1699,6 @@ rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0,
 	struct rt2560_tx_data *data;
 	struct ieee80211_frame *wh;
 	struct ieee80211_key *k;
-	struct mbuf *mnew;
 	uint16_t dur;
 	uint32_t flags = 0;
 	int pktlen, rate, needcts = 0, needrts = 0, error;
@@ -1828,27 +1827,10 @@ rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0,
 	}
 	if (error != 0) {
 		/* too many fragments, linearize */
-
-		MGETHDR(mnew, M_DONTWAIT, MT_DATA);
-		if (mnew == NULL) {
+		if (m_defrag(m0, M_DONTWAIT) != 0) {
 			m_freem(m0);
 			return ENOMEM;
 		}
-		M_DUP_PKTHDR(mnew, m0);
-		if (m0->m_pkthdr.len > MHLEN) {
-			MCLGET(mnew, M_DONTWAIT);
-			if (!(mnew->m_flags & M_EXT)) {
-				m_freem(m0);
-				m_freem(mnew);
-				return ENOMEM;
-			}
-		}
-
-		m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, caddr_t));
-		m_freem(m0);
-		mnew->m_len = mnew->m_pkthdr.len;
-		m0 = mnew;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {
@@ -2551,7 +2533,6 @@ rt2560_read_eeprom(struct rt2560_softc *sc)
 int
 rt2560_bbp_init(struct rt2560_softc *sc)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	int i, ntries;
 
 	/* wait for BBP to be ready */
@@ -2566,7 +2547,7 @@ rt2560_bbp_init(struct rt2560_softc *sc)
 	}
 
 	/* initialize BBP registers to default values */
-	for (i = 0; i < N(rt2560_def_bbp); i++) {
+	for (i = 0; i < nitems(rt2560_def_bbp); i++) {
 		rt2560_bbp_write(sc, rt2560_def_bbp[i].reg,
 		    rt2560_def_bbp[i].val);
 	}
@@ -2580,13 +2561,11 @@ rt2560_bbp_init(struct rt2560_softc *sc)
 #endif
 
 	return 0;
-#undef N
 }
 
 int
 rt2560_init(struct ifnet *ifp)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	struct rt2560_softc *sc = ifp->if_softc;
 	struct ieee80211com *ic = &sc->sc_ic;
 	uint32_t tmp;
@@ -2624,7 +2603,7 @@ rt2560_init(struct ifnet *ifp)
 	RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr);
 
 	/* initialize MAC registers to default values */
-	for (i = 0; i < N(rt2560_def_mac); i++)
+	for (i = 0; i < nitems(rt2560_def_mac); i++)
 		RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val);
 
 	IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(ifp->if_sadl));
@@ -2683,7 +2662,6 @@ rt2560_init(struct ifnet *ifp)
 		ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
 
 	return 0;
-#undef N
 }
 
 void
diff --git a/sys/dev/ic/rt2661.c b/sys/dev/ic/rt2661.c
index a105b8f79f1..c22fd40b010 100644
--- a/sys/dev/ic/rt2661.c
+++ b/sys/dev/ic/rt2661.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rt2661.c,v 1.44 2008/08/27 09:05:03 damien Exp $	*/
+/*	$OpenBSD: rt2661.c,v 1.45 2008/11/25 21:43:57 damien Exp $	*/
 
 /*-
  * Copyright (c) 2006
@@ -1546,7 +1546,6 @@ rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0,
 	struct rt2661_tx_data *data;
 	struct ieee80211_frame *wh;
 	struct ieee80211_key *k;
-	struct mbuf *mnew;
 	uint16_t dur;
 	uint32_t flags = 0;
 	int pktlen, rate, needcts = 0, needrts = 0, error;
@@ -1672,27 +1671,10 @@ rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0,
 	}
 	if (error != 0) {
 		/* too many fragments, linearize */
-
-		MGETHDR(mnew, M_DONTWAIT, MT_DATA);
-		if (mnew == NULL) {
+		if (m_defrag(m0, M_DONTWAIT) != 0) {
 			m_freem(m0);
 			return ENOMEM;
 		}
-		M_DUP_PKTHDR(mnew, m0);
-		if (m0->m_pkthdr.len > MHLEN) {
-			MCLGET(mnew, M_DONTWAIT);
-			if (!(mnew->m_flags & M_EXT)) {
-				m_freem(m0);
-				m_freem(mnew);
-				return ENOMEM;
-			}
-		}
-
-		m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, caddr_t));
-		m_freem(m0);
-		mnew->m_len = mnew->m_pkthdr.len;
-		m0 = mnew;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {
@@ -2387,7 +2369,6 @@ rt2661_read_eeprom(struct rt2661_softc *sc)
 int
 rt2661_bbp_init(struct rt2661_softc *sc)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	int i, ntries;
 
 	/* wait for BBP to be ready */
@@ -2403,7 +2384,7 @@ rt2661_bbp_init(struct rt2661_softc *sc)
 	}
 
 	/* initialize BBP registers to default values */
-	for (i = 0; i < N(rt2661_def_bbp); i++) {
+	for (i = 0; i < nitems(rt2661_def_bbp); i++) {
 		rt2661_bbp_write(sc, rt2661_def_bbp[i].reg,
 		    rt2661_def_bbp[i].val);
 	}
@@ -2416,13 +2397,11 @@ rt2661_bbp_init(struct rt2661_softc *sc)
 	}
 
 	return 0;
-#undef N
 }
 
 int
 rt2661_init(struct ifnet *ifp)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	struct rt2661_softc *sc = ifp->if_softc;
 	struct ieee80211com *ic = &sc->sc_ic;
 	const char *name = NULL;	/* make lint happy */
@@ -2515,7 +2494,7 @@ rt2661_init(struct ifnet *ifp)
 	RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 2);
 
 	/* initialize MAC registers to default values */
-	for (i = 0; i < N(rt2661_def_mac); i++)
+	for (i = 0; i < nitems(rt2661_def_mac); i++)
 		RAL_WRITE(sc, rt2661_def_mac[i].reg, rt2661_def_mac[i].val);
 
 	IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(ifp->if_sadl));
@@ -2566,7 +2545,7 @@ rt2661_init(struct ifnet *ifp)
 	RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp);
 
 	/* clear STA registers */
-	RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, N(sta));
+	RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, nitems(sta));
 
 	/* initialize ASIC */
 	RAL_WRITE(sc, RT2661_MAC_CSR1, 4);
@@ -2590,7 +2569,6 @@ rt2661_init(struct ifnet *ifp)
 		ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
 
 	return 0;
-#undef N
 }
 
 void
diff --git a/sys/dev/ic/rt2860.c b/sys/dev/ic/rt2860.c
index c73bc281d6f..c8cc331dc2e 100644
--- a/sys/dev/ic/rt2860.c
+++ b/sys/dev/ic/rt2860.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rt2860.c,v 1.19 2008/08/27 09:05:03 damien Exp $	*/
+/*	$OpenBSD: rt2860.c,v 1.20 2008/11/25 21:43:57 damien Exp $	*/
 
 /*-
  * Copyright (c) 2007,2008
@@ -170,7 +170,6 @@ static const struct rfprog {
 int
 rt2860_attach(void *xsc, int id)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	struct rt2860_softc *sc = xsc;
 	struct ieee80211com *ic = &sc->sc_ic;
 	struct ifnet *ifp = &ic->ic_if;
@@ -255,7 +254,7 @@ rt2860_attach(void *xsc, int id)
 		    ieee80211_std_rateset_11a;
 
 		/* set supported .11a channels */
-		for (i = 14; i < N(rt2860_rf2850); i++) {
+		for (i = 14; i < nitems(rt2860_rf2850); i++) {
 			uint8_t chan = rt2860_rf2850[i].chan;
 			ic->ic_channels[chan].ic_freq =
 			    ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ);
@@ -333,7 +332,6 @@ fail2:	rt2860_free_rx_ring(sc, &sc->rxq);
 fail1:	while (--qid >= 0)
 		rt2860_free_tx_ring(sc, &sc->txq[qid]);
 	return error;
-#undef N
 }
 
 int
@@ -1488,27 +1486,10 @@ rt2860_tx_data(struct rt2860_softc *sc, struct mbuf *m0,
 		}
 	}
 	if (error != 0) {	/* too many fragments, linearize */
-		struct mbuf *m1;
-
-		MGETHDR(m1, M_DONTWAIT, MT_DATA);
-		if (m1 == NULL) {
+		if (m_defrag(m0, M_DONTWAIT) != 0) {
 			m_freem(m0);
 			return ENOMEM;
 		}
-		M_DUP_PKTHDR(m1, m0);
-		if (m0->m_pkthdr.len > MHLEN) {
-			MCLGET(m1, M_DONTWAIT);
-			if (!(m1->m_flags & M_EXT)) {
-				m_freem(m0);
-				m_freem(m1);
-				return ENOMEM;
-			}
-		}
-		m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m1, caddr_t));
-		m1->m_len = m1->m_pkthdr.len;
-		m_freem(m0);
-		m0 = m1;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {
@@ -2322,7 +2303,6 @@ rt2860_get_rf(uint8_t rev)
 int
 rt2860_read_eeprom(struct rt2860_softc *sc)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	struct ieee80211com *ic = &sc->sc_ic;
 	uint16_t val;
 	int8_t delta_2ghz, delta_5ghz;
@@ -2579,13 +2559,11 @@ rt2860_read_eeprom(struct rt2860_softc *sc)
 	}
 
 	return 0;
-#undef N
 }
 
 int
 rt2860_bbp_init(struct rt2860_softc *sc)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	int i, ntries;
 
 	/* wait for BBP to wake up */
@@ -2601,7 +2579,7 @@ rt2860_bbp_init(struct rt2860_softc *sc)
 	}
 
 	/* initialize BBP registers to default values */
-	for (i = 0; i < N(rt2860_def_bbp); i++) {
+	for (i = 0; i < nitems(rt2860_def_bbp); i++) {
 		rt2860_mcu_bbp_write(sc, rt2860_def_bbp[i].reg,
 		    rt2860_def_bbp[i].val);
 	}
@@ -2613,13 +2591,11 @@ rt2860_bbp_init(struct rt2860_softc *sc)
 	}
 
 	return 0;
-#undef N
 }
 
 int
 rt2860_init(struct ifnet *ifp)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	struct rt2860_softc *sc = ifp->if_softc;
 	struct ieee80211com *ic = &sc->sc_ic;
 	uint32_t tmp;
@@ -2693,7 +2669,7 @@ rt2860_init(struct ifnet *ifp)
 	RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, RT2860_BBP_HRST | RT2860_MAC_SRST);
 	RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, 0);
 
-	for (i = 0; i < N(rt2860_def_mac); i++)
+	for (i = 0; i < nitems(rt2860_def_mac); i++)
 		RAL_WRITE(sc, rt2860_def_mac[i].reg, rt2860_def_mac[i].val);
 
 	/* wait while MAC is busy */
@@ -2857,7 +2833,6 @@ rt2860_init(struct ifnet *ifp)
 		ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
 
 	return 0;
-#undef N
 }
 
 void
diff --git a/sys/dev/pci/if_ipw.c b/sys/dev/pci/if_ipw.c
index 52f30ff4c9d..3df6e44fd83 100644
--- a/sys/dev/pci/if_ipw.c
+++ b/sys/dev/pci/if_ipw.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_ipw.c,v 1.80 2008/09/03 19:43:59 damien Exp $	*/
+/*	$OpenBSD: if_ipw.c,v 1.81 2008/11/25 21:43:57 damien Exp $	*/
 
 /*-
  * Copyright (c) 2004-2008
@@ -610,7 +610,6 @@ ipw_media_change(struct ifnet *ifp)
 void
 ipw_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 {
-#define N(a)	(sizeof (a) / sizeof (a[0]))
 	struct ipw_softc *sc = ifp->if_softc;
 	struct ieee80211com *ic = &sc->sc_ic;
 	static const struct {
@@ -635,8 +634,8 @@ ipw_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 	val &= 0xf;
 
 	/* convert rate to 802.11 rate */
-	for (i = 0; i < N(rates) && rates[i].val != val; i++);
-	rate = (i < N(rates)) ? rates[i].rate : 0;
+	for (i = 0; i < nitems(rates) && rates[i].val != val; i++);
+	rate = (i < nitems(rates)) ? rates[i].rate : 0;
 
 	imr->ifm_active |= IFM_IEEE80211_11B;
 	imr->ifm_active |= ieee80211_rate2media(ic, rate, IEEE80211_MODE_11B);
@@ -655,7 +654,6 @@ ipw_media_status(struct ifnet *ifp, struct ifmediareq *imr)
 		/* should not get there */
 		break;
 	}
-#undef N
 }
 
 int
@@ -1132,7 +1130,6 @@ ipw_tx_start(struct ifnet *ifp, struct mbuf *m, struct ieee80211_node *ni)
 	struct ipw_soft_bd *sbd;
 	struct ipw_soft_hdr *shdr;
 	struct ipw_soft_buf *sbuf;
-	struct mbuf *mnew;
 	int error, i;
 
 	wh = mtod(m, struct ieee80211_frame *);
@@ -1194,26 +1191,10 @@ ipw_tx_start(struct ifnet *ifp, struct mbuf *m, struct ieee80211_node *ni)
 	}
 	if (error != 0) {
 		/* too many fragments, linearize */
-
-		MGETHDR(mnew, M_DONTWAIT, MT_DATA);
-		if (mnew == NULL) {
+		if (m_defrag(m, M_DONTWAIT) != 0) {
 			m_freem(m);
 			return ENOMEM;
 		}
-		M_DUP_PKTHDR(mnew, m);
-		if (m->m_pkthdr.len > MHLEN) {
-			MCLGET(mnew, M_DONTWAIT);
-			if (!(mnew->m_flags & M_EXT)) {
-				m_freem(m);
-				m_freem(mnew);
-				return ENOMEM;
-			}
-		}
-		m_copydata(m, 0, m->m_pkthdr.len, mtod(mnew, caddr_t));
-		m_freem(m);
-		mnew->m_len = mnew->m_pkthdr.len;
-		m = mnew;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, sbuf->map, m,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {
diff --git a/sys/dev/pci/if_iwi.c b/sys/dev/pci/if_iwi.c
index 64dc8c74db1..69a826cfc92 100644
--- a/sys/dev/pci/if_iwi.c
+++ b/sys/dev/pci/if_iwi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_iwi.c,v 1.94 2008/09/04 15:59:52 damien Exp $	*/
+/*	$OpenBSD: if_iwi.c,v 1.95 2008/11/25 21:43:57 damien Exp $	*/
 
 /*-
  * Copyright (c) 2004-2008
@@ -1236,7 +1236,6 @@ iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni)
 	struct iwi_tx_data *data;
 	struct iwi_tx_desc *desc;
 	struct iwi_tx_ring *txq = &sc->txq[0];
-	struct mbuf *mnew;
 	int hdrlen, error, i, station = 0;
 
 	wh = mtod(m0, struct ieee80211_frame *);
@@ -1300,27 +1299,10 @@ iwi_tx_start(struct ifnet *ifp, struct mbuf *m0, struct ieee80211_node *ni)
 	}
 	if (error != 0) {
 		/* too many fragments, linearize */
-
-		MGETHDR(mnew, M_DONTWAIT, MT_DATA);
-		if (mnew == NULL) {
+		if (m_defrag(m0, M_DONTWAIT) != 0) {
 			m_freem(m0);
 			return ENOMEM;
 		}
-		M_DUP_PKTHDR(mnew, m0);
-		if (m0->m_pkthdr.len > MHLEN) {
-			MCLGET(mnew, M_DONTWAIT);
-			if (!(mnew->m_flags & M_EXT)) {
-				m_freem(m0);
-				m_freem(mnew);
-				return ENOMEM;
-			}
-		}
-
-		m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, caddr_t));
-		m_freem(m0);
-		mnew->m_len = mnew->m_pkthdr.len;
-		m0 = mnew;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {
diff --git a/sys/dev/pci/if_iwn.c b/sys/dev/pci/if_iwn.c
index e60825b5877..1933e9515ba 100644
--- a/sys/dev/pci/if_iwn.c
+++ b/sys/dev/pci/if_iwn.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_iwn.c,v 1.38 2008/11/25 17:06:27 damien Exp $	*/
+/*	$OpenBSD: if_iwn.c,v 1.39 2008/11/25 21:43:57 damien Exp $	*/
 
 /*-
  * Copyright (c) 2007, 2008
@@ -2144,7 +2144,6 @@ iwn_wakeup_intr(struct iwn_softc *sc)
 void
 iwn_fatal_intr(struct iwn_softc *sc)
 {
-#define N(a)	(sizeof (a) / sizeof ((a)[0]))
 	const struct iwn_hal *hal = sc->sc_hal;
 	struct iwn_fw_dump dump;
 	int i;
@@ -2174,7 +2173,7 @@ iwn_fatal_intr(struct iwn_softc *sc)
 	}
 	printf("firmware error log:\n");
 	printf("  error type      = \"%s\" (0x%08X)\n",
-	    (dump.id < N(iwn_fw_errmsg)) ?
+	    (dump.id < nitems(iwn_fw_errmsg)) ?
 		iwn_fw_errmsg[dump.id] : "UNKNOWN",
 	    dump.id);
 	printf("  program counter = 0x%08X\n", dump.pc);
@@ -2196,7 +2195,6 @@ iwn_fatal_intr(struct iwn_softc *sc)
 	}
 	printf("  rx ring: cur=%d\n", sc->rxq.cur);
 	printf("  802.11 state %d\n", sc->sc_ic.ic_state);
-#undef N
 }
 
 int
@@ -2334,7 +2332,6 @@ iwn_tx(struct iwn_softc *sc, struct mbuf *m, struct ieee80211_node *ni)
 	struct ieee80211_frame *wh;
 	struct ieee80211_key *k = NULL;
 	enum ieee80211_edca_ac ac;
-	struct mbuf *m1;
 	uint32_t flags;
 	uint16_t qos;
 	u_int hdrlen;
@@ -2549,24 +2546,10 @@ iwn_tx(struct iwn_softc *sc, struct mbuf *m, struct ieee80211_node *ni)
 	}
 	if (error != 0) {
 		/* Too many DMA segments, linearize mbuf. */
-		MGETHDR(m1, M_DONTWAIT, MT_DATA);
-		if (m1 == NULL) {
+		if (m_defrag(m, M_DONTWAIT) != 0) {
 			m_freem(m);
 			return ENOMEM;
 		}
-		if (m->m_pkthdr.len > MHLEN) {
-			MCLGET(m1, M_DONTWAIT);
-			if (!(m1->m_flags & M_EXT)) {
-				m_freem(m);
-				m_freem(m1);
-				return ENOMEM;
-			}
-		}
-		m_copydata(m, 0, m->m_pkthdr.len, mtod(m1, caddr_t));
-		m1->m_len = m1->m_pkthdr.len = m->m_pkthdr.len;
-		m_freem(m);
-		m = m1;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {
diff --git a/sys/dev/pci/if_wpi.c b/sys/dev/pci/if_wpi.c
index 3cdbf8af0ed..730ae5d9ab3 100644
--- a/sys/dev/pci/if_wpi.c
+++ b/sys/dev/pci/if_wpi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_wpi.c,v 1.74 2008/11/25 17:06:26 damien Exp $	*/
+/*	$OpenBSD: if_wpi.c,v 1.75 2008/11/25 21:43:57 damien Exp $	*/
 
 /*-
  * Copyright (c) 2006-2008
@@ -1675,7 +1675,6 @@ wpi_tx(struct wpi_softc *sc, struct mbuf *m, struct ieee80211_node *ni)
 	struct ieee80211_frame *wh;
 	struct ieee80211_key *k = NULL;
 	enum ieee80211_edca_ac ac;
-	struct mbuf *m1;
 	uint32_t flags;
 	uint16_t qos;
 	u_int hdrlen;
@@ -1851,24 +1850,10 @@ wpi_tx(struct wpi_softc *sc, struct mbuf *m, struct ieee80211_node *ni)
 	}
 	if (error != 0) {
 		/* Too many DMA segments, linearize mbuf. */
-		MGETHDR(m1, M_DONTWAIT, MT_DATA);
-		if (m1 == NULL) {
+		if (m_defrag(m, M_DONTWAIT) != 0) {
 			m_freem(m);
 			return ENOMEM;
 		}
-		if (m->m_pkthdr.len > MHLEN) {
-			MCLGET(m1, M_DONTWAIT);
-			if (!(m1->m_flags & M_EXT)) {
-				m_freem(m);
-				m_freem(m1);
-				return ENOMEM;
-			}
-		}
-		m_copydata(m, 0, m->m_pkthdr.len, mtod(m1, caddr_t));
-		m1->m_len = m1->m_pkthdr.len = m->m_pkthdr.len;
-		m_freem(m);
-		m = m1;
-
 		error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m,
 		    BUS_DMA_NOWAIT);
 		if (error != 0) {