On 08/01/14 02:12, Eric Dumazet wrote:
On Wed, 2014-01-08 at 00:10 +0000, Zoltan Kiss wrote:


+               if (skb_shinfo(skb)->frag_list) {
+                       nskb = skb_shinfo(skb)->frag_list;
+                       xenvif_fill_frags(vif, nskb, INVALID_PENDING_IDX);
+                       skb->len += nskb->len;
+                       skb->data_len += nskb->len;
+                       skb->truesize += nskb->truesize;
+                       skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+                       skb_shinfo(nskb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+                       vif->tx_zerocopy_sent += 2;
+                       nskb = skb;
+
+                       skb = skb_copy_expand(skb,
+                                       0,
+                                       0,
+                                       GFP_ATOMIC | __GFP_NOWARN);

skb can be NULL here

Thanks, fixed that.

Zoli


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