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path: root/drivers/net/xen-netback/netback.c
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Diffstat (limited to 'drivers/net/xen-netback/netback.c')
-rw-r--r--drivers/net/xen-netback/netback.c25
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 80aae3a32c2a..1d9940d4e8c7 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1072,11 +1072,6 @@ static int xenvif_handle_frag_list(struct xenvif_queue *queue, struct sk_buff *s
skb_frag_size_set(&frags[i], len);
}
- /* Copied all the bits from the frag list -- free it. */
- skb_frag_list_init(skb);
- xenvif_skb_zerocopy_prepare(queue, nskb);
- kfree_skb(nskb);
-
/* Release all the original (foreign) frags. */
for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
skb_frag_unref(skb, f);
@@ -1145,6 +1140,8 @@ static int xenvif_tx_submit(struct xenvif_queue *queue)
xenvif_fill_frags(queue, skb);
if (unlikely(skb_has_frag_list(skb))) {
+ struct sk_buff *nskb = skb_shinfo(skb)->frag_list;
+ xenvif_skb_zerocopy_prepare(queue, nskb);
if (xenvif_handle_frag_list(queue, skb)) {
if (net_ratelimit())
netdev_err(queue->vif->dev,
@@ -1153,6 +1150,9 @@ static int xenvif_tx_submit(struct xenvif_queue *queue)
kfree_skb(skb);
continue;
}
+ /* Copied all the bits from the frag list -- free it. */
+ skb_frag_list_init(skb);
+ kfree_skb(nskb);
}
skb->dev = queue->vif->dev;
@@ -1169,15 +1169,24 @@ static int xenvif_tx_submit(struct xenvif_queue *queue)
continue;
}
- skb_probe_transport_header(skb, 0);
+ skb_probe_transport_header(skb);
/* If the packet is GSO then we will have just set up the
* transport header offset in checksum_setup so it's now
* straightforward to calculate gso_segs.
*/
if (skb_is_gso(skb)) {
- int mss = skb_shinfo(skb)->gso_size;
- int hdrlen = skb_transport_header(skb) -
+ int mss, hdrlen;
+
+ /* GSO implies having the L4 header. */
+ WARN_ON_ONCE(!skb_transport_header_was_set(skb));
+ if (unlikely(!skb_transport_header_was_set(skb))) {
+ kfree_skb(skb);
+ continue;
+ }
+
+ mss = skb_shinfo(skb)->gso_size;
+ hdrlen = skb_transport_header(skb) -
skb_mac_header(skb) +
tcp_hdrlen(skb);