virtio-net: restore VIRTIO_HDR_F_DATA_VALID on receiving
Commit 501db511 ("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: NJason Wang <jasowang@redhat.com> Acked-by: NRolf Neugebauer <rolf.neugebauer@docker.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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