[PATCH 4.1 141/159] virtio_net: dont require ANY_LAYOUT with VERSION_1

From: Greg Kroah-Hartman
Date: Sat Sep 26 2015 - 17:27:28 EST

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


From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>

[ Upstream commit 75993300d008f418ee2569a632185fc1d7d50674 ]

ANY_LAYOUT is a compatibility feature. It's implied
for VERSION_1 devices, and non-transitional devices
might not offer it. Change code to behave accordingly.

Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
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
@@ -1828,7 +1828,8 @@ static int virtnet_probe(struct virtio_d
vi->hdr_len = sizeof(struct virtio_net_hdr);

- if (virtio_has_feature(vdev, VIRTIO_F_ANY_LAYOUT))
+ if (virtio_has_feature(vdev, VIRTIO_F_ANY_LAYOUT) ||
+ virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
vi->any_header_sg = true;

if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ))

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/