virtio-net: alloc big buffers also when guest can receive UFO

[ Upstream commit 0e7ede80d929ff0f830c44a543daa1acd590c749 ]

We should alloc big buffers also when guest can receive UFO
packets to let the big packets fit into guest rx buffer.

Fixes 5c5167515d80f78f6bb538492c423adcae31ad65
(virtio-net: Allow UFO feature to be set and advertised.)

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 43a6a11..f13a673 100644 (file)
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1029,7 +1029,8 @@ static int virtnet_probe(struct virtio_device *vdev)
        /* If we can receive ANY GSO packets, we must allocate large ones. */
        if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) ||
            virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) ||
-           virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN))
+           virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ECN) ||
+           virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_UFO))
                vi->big_packets = true;
 
        if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))