[Xen-changelog] [xen-unstable] Add support for netif frontends which don't support checksum offload.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User ssmith@xxxxxxxxxxxxxxxxxxxxxxxxxx
# Node ID b219ea61a357385af107bc7261237f4bcfd35ae5
# Parent  5fa9b746d24fa2b427d9676cc5e27642bfd79137
Add support for netif frontends which don't support checksum offload.

Signed-off-by: Steven Smith <sos22@xxxxxxxxx>
---
 linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c |    8 ++++++++
 1 files changed, 8 insertions(+)

diff -r 5fa9b746d24f -r b219ea61a357 
linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c
--- a/linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c Sat Sep 02 12:11:54 
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c Mon Sep 04 16:38:24 
2006 +0100
@@ -427,6 +427,14 @@ static int connect_rings(struct backend_
                be->netif->dev->features |= NETIF_F_TSO;
        }
 
+       if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-no-csum-offload",
+                        "%d", &val) < 0)
+               val = 0;
+       if (val) {
+               be->netif->features &= ~NETIF_F_IP_CSUM;
+               be->netif->dev->features &= ~NETIF_F_IP_CSUM;
+       }
+
        /* Map the shared frame, irq etc. */
        err = netif_map(be->netif, tx_ring_ref, rx_ring_ref, evtchn);
        if (err) {

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