Index: sys/dev/virtio/pci/virtio_pci.c
===================================================================
--- sys/dev/virtio/pci/virtio_pci.c	(revision 343745)
+++ sys/dev/virtio/pci/virtio_pci.c	(working copy)
@@ -752,6 +752,13 @@
 	if (device_get_state(child) != DS_NOTPRESENT)
 		return;
 
+	/*
+	 * Force a reset to ensure the hypervisor internal structures
+	 * are up to date. Without this, the device might come up with the
+	 * wrong endianness.
+	 */
+	vtpci_reset(sc);
+
 	if (device_probe(child) != 0)
 		return;