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authorWolfram Joost <pegasos@frokaschwei.de>2006-01-16 16:57:41 -0700
committerJeff Garzik <jgarzik@pobox.com>2006-01-17 07:23:38 -0500
commit63890576a3bfd5c6aea86fb72236682480865bc0 (patch)
tree1d9142884b2d831b7f9b55714baa110457e35710 /drivers/net/mv643xx_eth.c
parent8f5187035ad475c90ca865318daa09ba43bc3e68 (diff)
[PATCH] mv643xx_eth: Request HW checksum generation only for IPv4
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>
Diffstat (limited to 'drivers/net/mv643xx_eth.c')
-rw-r--r--drivers/net/mv643xx_eth.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index f6d4ea175e1..615b3622ea6 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -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