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[PATCH] mv643xx_eth: Request HW checksum generation only for IPv4

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This patch removes the NETIF_F_HW_CSUM flag to be able to use other protocols
than IPv4. Hardware checksums for IPv4 should continue to work because
NETIF_F_IP_CSUM is still set.  The sanity-check has been enhanced to check
the used protocol and to not access skb->iph for non-ipv4-packets.

Signed-off-by: Wolfram Joost <pegasos@frokaschwei.de>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>

 mv643xx_eth.c |   19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Wolfram Joost 2006-01-16 16:57:41 -07:00 committed by Jeff Garzik
parent 8f5187035a
commit 63890576a3
1 changed files with 11 additions and 8 deletions
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19
drivers/net/mv643xx_eth.c
View file

@ -1148,7 +1148,6 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
5 << ETH_TX_IHL_SHIFT;
pkt_info.l4i_chk = 0;
} else {
pkt_info.cmd_sts = ETH_TX_ENABLE_INTERRUPT |
ETH_TX_FIRST_DESC |
ETH_TX_LAST_DESC |
@ -1156,14 +1155,16 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
ETH_GEN_IP_V_4_CHECKSUM |
skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
/* CPU already calculated pseudo header checksum. */
if (skb->nh.iph->protocol == IPPROTO_UDP) {
if ((skb->protocol == ETH_P_IP) &&
(skb->nh.iph->protocol == IPPROTO_UDP) ) {
pkt_info.cmd_sts |= ETH_UDP_FRAME;
pkt_info.l4i_chk = skb->h.uh->check;
} else if (skb->nh.iph->protocol == IPPROTO_TCP)
} else if ((skb->protocol == ETH_P_IP) &&
(skb->nh.iph->protocol == IPPROTO_TCP))
pkt_info.l4i_chk = skb->h.th->check;
else {
printk(KERN_ERR
"%s: chksum proto != TCP or UDP\n",
"%s: chksum proto != IPv4 TCP or UDP\n",
dev->name);
spin_unlock_irqrestore(&mp->lock, flags);
return 1;
@ -1199,14 +1200,16 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
ETH_GEN_IP_V_4_CHECKSUM |
skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
/* CPU already calculated pseudo header checksum. */
if (skb->nh.iph->protocol == IPPROTO_UDP) {
if ((skb->protocol == ETH_P_IP) &&
(skb->nh.iph->protocol == IPPROTO_UDP)) {
pkt_info.cmd_sts |= ETH_UDP_FRAME;
pkt_info.l4i_chk = skb->h.uh->check;
} else if (skb->nh.iph->protocol == IPPROTO_TCP)
} else if ((skb->protocol == ETH_P_IP) &&
(skb->nh.iph->protocol == IPPROTO_TCP))
pkt_info.l4i_chk = skb->h.th->check;
else {
printk(KERN_ERR
"%s: chksum proto != TCP or UDP\n",
"%s: chksum proto != IPv4 TCP or UDP\n",
dev->name);
spin_unlock_irqrestore(&mp->lock, flags);
return 1;
@ -1421,7 +1424,7 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
* Zero copy can only work if we use Discovery II memory. Else, we will
* have to map the buffers to ISA memory which is only 16 MB
*/
dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_HW_CSUM;
dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
#endif
#endif