virtio-net: restore VIRTIO_HDR_F_DATA_VALID on receiving

[ Upstream commit 6391a4481ba0796805d6581e42f9f0418c099e34 ]

Commit 501db511397f ("virtio: don't set VIRTIO_NET_HDR_F_DATA_VALID on
xmit") in fact disables VIRTIO_HDR_F_DATA_VALID on receiving path too,
fixing this by adding a hint (has_data_valid) and set it only on the
receiving path.

Cc: Rolf Neugebauer <rolf.neugebauer@docker.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 7869b06..6f38daf 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -827,7 +827,7 @@
 			return -EINVAL;
 
 		ret = virtio_net_hdr_from_skb(skb, &vnet_hdr,
-					      macvtap_is_little_endian(q));
+					      macvtap_is_little_endian(q), true);
 		if (ret)
 			BUG();