From: Per Forlin per.forlin@axis.com
[ Upstream commit 04fb91243a853dbde216d829c79d9632e52aa8d9 ]
Passing tag size to skb_cow_head will make sure there is enough headroom for the tag data. This change does not introduce any overhead in case there is already available headroom for tag.
Signed-off-by: Per Forlin perfn@axis.com Reviewed-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/dsa/tag_qca.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -33,7 +33,7 @@ static struct sk_buff *qca_tag_xmit(stru struct dsa_port *dp = dsa_slave_to_port(dev); u16 *phdr, hdr;
- if (skb_cow_head(skb, 0) < 0) + if (skb_cow_head(skb, QCA_HDR_LEN) < 0) return NULL;
skb_push(skb, QCA_HDR_LEN);