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authorPaul Durrant <Paul.Durrant@citrix.com>2013-12-12 14:20:13 +0000
committerDavid S. Miller <davem@davemloft.net>2013-12-12 15:47:18 -0500
commita3314f3d40215349ab2427800c1e10676691389f (patch)
treed607b78376eed9c9a82cebb91282f66c023e02aa
parenta0a9663dd2146d54339237764e1bfc60e8a39328 (diff)
downloadop-kernel-dev-a3314f3d40215349ab2427800c1e10676691389f.zip
op-kernel-dev-a3314f3d40215349ab2427800c1e10676691389f.tar.gz
xen-netback: fix gso_prefix check
There is a mistake in checking the gso_prefix mask when passing large packets to a guest. The wrong shift is applied to the bit - the raw skb gso type is used rather then the translated one. This leads to large packets being handed to the guest without the GSO metadata. This patch fixes the check. The mistake manifested as errors whilst running Microsoft HCK large packet offload tests between a pair of Windows 8 VMs. I have verified this patch fixes those errors. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: David Vrabel <david.vrabel@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/xen-netback/netback.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 33b8aa6..e884ee1 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -452,7 +452,7 @@ static int xenvif_gop_skb(struct sk_buff *skb,
}
/* Set up a GSO prefix descriptor, if necessary */
- if ((1 << skb_shinfo(skb)->gso_type) & vif->gso_prefix_mask) {
+ if ((1 << gso_type) & vif->gso_prefix_mask) {
req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++);
meta = npo->meta + npo->meta_prod++;
meta->gso_type = gso_type;
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