Commit d532c108 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

sr9700: use skb_cow_head() to deal with cloned skbs

We need to ensure there is enough headroom to push extra header,
but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

Fixes: c9b37458

 ("USB2NET : SR9700 : One chip USB 1.1 USB2NET SR9700Device Driver Support")
Signed-off-by: default avatarEric Dumazet <>
Cc: James Hughes <>
Signed-off-by: default avatarDavid S. Miller <>
parent a9e840a2
......@@ -456,14 +456,9 @@ static struct sk_buff *sr9700_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
len = skb->len;
if (skb_headroom(skb) < SR_TX_OVERHEAD) {
struct sk_buff *skb2;
skb2 = skb_copy_expand(skb, SR_TX_OVERHEAD, 0, flags);
if (skb_cow_head(skb, SR_TX_OVERHEAD)) {
skb = skb2;
if (!skb)
return NULL;
return NULL;
__skb_push(skb, SR_TX_OVERHEAD);
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