diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-04-19 09:59:22 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-21 13:24:05 -0400 |
| commit | a9e840a2081ed28c2b7caa6a9a0041c950b3c37d (patch) | |
| tree | 9f7b8a5f55e9807fc858273160a0ac0d58bfdb44 | |
| parent | b7c6d2675899cfff0180412c63fc9cbd5bacdb4d (diff) | |
cx82310_eth: 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: cc28a20e77b2 ("introduce cx82310_eth: Conexant CX82310-based ADSL router USB ethernet driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Hughes <james.hughes@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/usb/cx82310_eth.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/net/usb/cx82310_eth.c b/drivers/net/usb/cx82310_eth.c index e221bfcee76b..947bea81d924 100644 --- a/drivers/net/usb/cx82310_eth.c +++ b/drivers/net/usb/cx82310_eth.c @@ -293,12 +293,9 @@ static struct sk_buff *cx82310_tx_fixup(struct usbnet *dev, struct sk_buff *skb, { int len = skb->len; - if (skb_headroom(skb) < 2) { - struct sk_buff *skb2 = skb_copy_expand(skb, 2, 0, flags); + if (skb_cow_head(skb, 2)) { dev_kfree_skb_any(skb); - skb = skb2; - if (!skb) - return NULL; + return NULL; } skb_push(skb, 2); |