dev/e1000/if_em.c

979 	struct mbuf	*m_head;
998 		m_head = if_dequeue(ifp);
999 		if (m_head == NULL)
1005 		if (em_xmit(txr, &m_head)) {
1006 			if (m_head == NULL)
1008 			if_sendq_prepend(ifp, m_head);
1017 		ETHER_BPF_MTAP(ifp, m_head);
1922 	struct mbuf		*m_head;
1932 	m_head = *m_headp;
1933 	do_tso = m_head->m_pkthdr.csum_flags & CSUM_IP_TSO;
1951 	if (do_tso || m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD) {
1952 		if (do_tso || (m_head->m_next != NULL &&
1953 		    m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD)) {
1955 				m_head = m_dup(*m_headp, M_NOWAIT);
1957 				if (m_head == NULL) {
1961 				*m_headp = m_head;
1970 		if (m_head->m_len < ip_off) {
1971 			m_head = m_pullup(m_head, ip_off);
1972 			if (m_head == NULL) {
1977 		eh = mtod(m_head, struct ether_header *);
1980 			if (m_head->m_len < ip_off) {
1981 				m_head = m_pullup(m_head, ip_off);
1982 				if (m_head == NULL) {
1988 		if (m_head->m_len < ip_off + sizeof(struct ip)) {
1989 			m_head = m_pullup(m_head, ip_off + sizeof(struct ip));
1990 			if (m_head == NULL) {
1995 		ip = (struct ip *)(mtod(m_head, char *) + ip_off);
1998 		if (do_tso || (m_head->m_pkthdr.csum_flags & CSUM_TCP)) {
1999 			if (m_head->m_len < poff + sizeof(struct tcphdr)) {
2000 				m_head = m_pullup(m_head, poff +
2002 				if (m_head == NULL) {
2007 			tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
2012 			if (m_head->m_len < poff + (tp->th_off << 2)) {
2013 				m_head = m_pullup(m_head, poff +
2016 				if (m_head == NULL) {
2021 			ip = (struct ip *)(mtod(m_head, char *) + ip_off);
2022 			tp = (struct tcphdr *)(mtod(m_head, char *) + poff);
2024 				ip->ip_len = htons(m_head->m_pkthdr.tso_segsz +
2038 		} else if (m_head->m_pkthdr.csum_flags & CSUM_UDP) {
2039 			if (m_head->m_len < poff + sizeof(struct udphdr)) {
2040 				m_head = m_pullup(m_head, poff +
2042 				if (m_head == NULL) {
2047 			ip = (struct ip *)(mtod(m_head, char *) + ip_off);
2049 		*m_headp = m_head;
2117 	m_head = *m_headp;
2120 	if (m_head->m_pkthdr.csum_flags & CSUM_IP_TSO) {
2121 		em_tso_setup(txr, m_head, ip_off, ip, tp,
2125 	} else if (m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD)
2126 		em_transmit_checksum_setup(txr, m_head,
2129 	if (m_head->m_flags & M_VLANTAG) {
2131 		txd_upper |= htole16(if_getvtag(m_head)) << 16;
2183 		tx_buffer->m_head = NULL;
2190         tx_buffer->m_head = m_head;
3637 		if (txbuf->m_head != NULL) {
3641 			m_freem(txbuf->m_head);
3642 			txbuf->m_head = NULL;
3855 		if (txbuf->m_head != NULL) {
3860 			m_freem(txbuf->m_head);
3861 			txbuf->m_head = NULL;
4046 	tx_buffer->m_head = NULL;
4122 	tx_buffer->m_head = NULL;
4191 			if (tx_buffer->m_head) {
4197                         	m_freem(tx_buffer->m_head);
4198                         	tx_buffer->m_head = NULL;
4278 		if (rxbuf->m_head == NULL) {
4290 			m = rxbuf->m_head;
4303 			rxbuf->m_head = NULL;
4306 		rxbuf->m_head = m;
4424 		if (rxbuf->m_head != NULL) {
4428 			m_freem(rxbuf->m_head);
4429 			rxbuf->m_head = NULL; /* mark as freed */
4449 		rxbuf->m_head = m_getjcl(M_NOWAIT, MT_DATA,
4451 		if (rxbuf->m_head == NULL) {
4455 		rxbuf->m_head->m_len = adapter->rx_mbuf_sz;
4456 		rxbuf->m_head->m_flags &= ~M_HASFCS; /* we strip it */
4457 		rxbuf->m_head->m_pkthdr.len = adapter->rx_mbuf_sz;
4461 		    rxbuf->map, rxbuf->m_head, seg,
4464 			m_freem(rxbuf->m_head);
4465 			rxbuf->m_head = NULL;
4511 			if (rxbuf->m_head != NULL) {
4515 				m_freem(rxbuf->m_head);
4516 				rxbuf->m_head = NULL;
4569 			if (rxbuf->m_head != NULL) {
4570 				m_freem(rxbuf->m_head);
4571 				rxbuf->m_head = NULL;
4865 		mp = rxr->rx_buffers[i].m_head;
4869 		rxr->rx_buffers[i].m_head = NULL;
4966 	if (rbuf->m_head) {
4967 		m_free(rbuf->m_head);
4968 		rbuf->m_head = NULL;