From 55508d601dab7df5cbcc7a63f4be8620eface204 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Tue, 14 Dec 2010 15:24:08 +0000 Subject: net: Use skb_checksum_start_offset() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Replace skb->csum_start - skb_headroom(skb) with skb_checksum_start_offset(). Note for usb/smsc95xx: skb->data - skb->head == skb_headroom(skb). Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- drivers/net/atlx/atl1.c | 2 +- drivers/net/macvtap.c | 3 +-- drivers/net/tun.c | 2 +- drivers/net/usb/smsc95xx.c | 7 +++---- drivers/net/virtio_net.c | 2 +- 5 files changed, 7 insertions(+), 9 deletions(-) (limited to 'drivers') diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c index 53363108994e..def8df83359c 100644 --- a/drivers/net/atlx/atl1.c +++ b/drivers/net/atlx/atl1.c @@ -2174,7 +2174,7 @@ static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb, u8 css, cso; if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { - css = (u8) (skb->csum_start - skb_headroom(skb)); + css = skb_checksum_start_offset(skb); cso = css + (u8) skb->csum_offset; if (unlikely(css & 0x1)) { /* L1 hardware requires an even number here */ diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 42567279843e..21845affea13 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -504,8 +504,7 @@ static int macvtap_skb_to_vnet_hdr(const struct sk_buff *skb, if (skb->ip_summed == CHECKSUM_PARTIAL) { vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - vnet_hdr->csum_start = skb->csum_start - - skb_headroom(skb); + vnet_hdr->csum_start = skb_checksum_start_offset(skb); vnet_hdr->csum_offset = skb->csum_offset; } /* else everything is zero */ diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 55f3a3e667a9..7599c457abd1 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -757,7 +757,7 @@ static __inline__ ssize_t tun_put_user(struct tun_struct *tun, if (skb->ip_summed == CHECKSUM_PARTIAL) { gso.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - gso.csum_start = skb->csum_start - skb_headroom(skb); + gso.csum_start = skb_checksum_start_offset(skb); gso.csum_offset = skb->csum_offset; } /* else everything is zero */ diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 65cb1abfbe57..bc86f4b6ecc2 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -1163,9 +1163,8 @@ static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) { - int len = skb->data - skb->head; - u16 high_16 = (u16)(skb->csum_offset + skb->csum_start - len); - u16 low_16 = (u16)(skb->csum_start - len); + u16 low_16 = (u16)skb_checksum_start_offset(skb); + u16 high_16 = low_16 + skb->csum_offset; return (high_16 << 16) | low_16; } @@ -1193,7 +1192,7 @@ static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, if (skb->len <= 45) { /* workaround - hardware tx checksum does not work * properly with extremely small packets */ - long csstart = skb->csum_start - skb_headroom(skb); + long csstart = skb_checksum_start_offset(skb); __wsum calc = csum_partial(skb->data + csstart, skb->len - csstart, 0); *((__sum16 *)(skb->data + csstart diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index b6d402806ae6..90a23e410d1b 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -519,7 +519,7 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) if (skb->ip_summed == CHECKSUM_PARTIAL) { hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; - hdr->hdr.csum_start = skb->csum_start - skb_headroom(skb); + hdr->hdr.csum_start = skb_checksum_start_offset(skb); hdr->hdr.csum_offset = skb->csum_offset; } else { hdr->hdr.flags = 0; -- cgit v1.2.2