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Date:	Thu, 20 Mar 2014 17:10:55 -0700
From:	Greg Kroah-Hartman <>
Cc:	Greg Kroah-Hartman <>,, Rusty Russell <>,
	"Michael S. Tsirkin" <>,
	Sridhar Samudrala <>,
	Jason Wang <>,
	"David S. Miller" <>
Subject: [PATCH 3.4 04/35] virtio-net: alloc big buffers also when guest can receive UFO

3.4-stable review patch.  If anyone has any objections, please let me know.


From: Jason Wang <>

[ 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 <>
Cc: Michael S. Tsirkin <>
Cc: Sridhar Samudrala <>
Signed-off-by: Jason Wang <>
Acked-by: Michael S. Tsirkin <>
Acked-by: Rusty Russell <>
Signed-off-by: David S. Miller <>
Signed-off-by: Greg Kroah-Hartman <>
 drivers/net/virtio_net.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1084,7 +1084,8 @@ static int virtnet_probe(struct virtio_d
 	/* 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))

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