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r8152: add skb_cow_head 

Call skb_cow_head() before editing the tx packet header. The header
would be reallocated if it is shared.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
hayeswang 2014-03-11 10:20:32 +08:00 committed by David S. Miller
parent 8dc43ddc9f
commit fcb308d529
1 changed files with 10 additions and 2 deletions
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12
drivers/net/usb/r8152.c
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@ -1376,6 +1376,11 @@ static int msdn_giant_send_check(struct sk_buff *skb)
{
const struct ipv6hdr *ipv6h;
struct tcphdr *th;
int ret;
ret = skb_cow_head(skb, 0);
if (ret)
return ret;
ipv6h = ipv6_hdr(skb);
th = tcp_hdr(skb);
@ -1383,7 +1388,7 @@ static int msdn_giant_send_check(struct sk_buff *skb)
th->check = 0;
th->check = ~tcp_v6_check(0, &ipv6h->saddr, &ipv6h->daddr, 0);
return 0;
return ret;
}
static int r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc,
@ -1412,8 +1417,11 @@ static int r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc,
break;
case htons(ETH_P_IPV6):
if (msdn_giant_send_check(skb)) {
ret = TX_CSUM_TSO;
goto unavailable;
}
opts1 |= GTSENDV6;
msdn_giant_send_check(skb);
break;
default: