D4978.diff
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	Index: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
	===================================================================
	--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
	+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
	@@ -755,7 +755,6 @@
	hn_softc_t *sc = ifp->if_softc;
	struct hv_device *device_ctx = vmbus_get_devctx(sc->hn_dev);
	netvsc_dev *net_dev = sc->net_dev;
	- netvsc_packet *packet;
	struct ether_vlan_header *eh;
	rndis_msg *rndis_mesg;
	rndis_packet *rndis_pkt;
	@@ -775,6 +774,7 @@
	bus_dma_segment_t segs[HN_TX_DATA_SEGCNT_MAX];
	int error, nsegs, i, send_failed = 0;
	struct hn_txdesc *txd;
	+ netvsc_packet *packet;
	struct mbuf *m_head;

	IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
	@@ -790,11 +790,7 @@
	}

	packet = &txd->netvsc_pkt;
	- /* XXX not necessary */
	- memset(packet, 0, sizeof(*packet));
	-
	packet->is_data_pkt = TRUE;
	-
	/* Initialize it from the mbuf */
	packet->tot_data_buf_len = m_head->m_pkthdr.len;