Enables receiving large packets from other LPARs. These packets
have a -1 IP header checksum, so we must recalculate to have
a valid checksum.
Signed-off-by: Brian King <brk...@linux.vnet.ibm.com>
Signed-off-by: Thomas Falcon <tlfal...@linux.vnet.ibm.com>
---
drivers/net/ethernet/ibm/ibmveth.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ibm/ibmveth.c
b/drivers/net/ethernet/ibm/ibmveth.c
index 08970c7..05eaca6a 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1092,6 +1092,7 @@ static int ibmveth_poll(struct napi_struct *napi, int
budget)
struct net_device *netdev = adapter->netdev;
int frames_processed = 0;
unsigned long lpar_rc;
+ struct iphdr *iph;
restart_poll:
while (frames_processed < budget) {
@@ -1134,8 +1135,20 @@ restart_poll:
skb_put(skb, length);
skb->protocol = eth_type_trans(skb, netdev);
- if (csum_good)
+ if (csum_good) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
+ if (be16_to_cpu(skb->protocol) == ETH_P_IP) {
+ skb_set_network_header(skb, 0);
+ skb_set_transport_header(skb,
sizeof(struct iphdr));
+ iph = ip_hdr(skb);
+
+ /* If the IP checksum is not offloaded
and if the packet
+ * is large send, the checksum must be
rebuilt.
+ */
+ if (iph->check == 0xffff)
+ iph->check =
ip_fast_csum((unsigned char *)iph, iph->ihl);
+ }
+ }
napi_gro_receive(napi, skb); /* send it up */
--
1.8.3.1
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