From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hayes Wang Subject: [PATCH net-next v2] r8152: add skb_cow_head Date: Tue, 11 Mar 2014 10:20:32 +0800 Message-ID: <1394504432-998-1-git-send-email-hayeswang@realtek.com> References: <1393934464-23675-1-git-send-email-hayeswang@realtek.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , Hayes Wang To: Return-path: In-Reply-To: <1393934464-23675-1-git-send-email-hayeswang-Rasf1IRRPZFBDgjK7y7TUQ@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org Call skb_cow_head() before editing the tx packet header. The header would be reallocated if it is shared. Signed-off-by: Hayes Wang --- drivers/net/usb/r8152.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index c7ef30d..a90a7eb9 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -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: -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html