[Xen-changelog] [xen-unstable] [NET] back: Advertise that we do not support rx-flip path any more.

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

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID 66cdabe97205613ec9f3b0462961dbedceb68e27
# Parent  af2155df2aed30090468bd71981b6dc4b2bb7c27
[NET] back: Advertise that we do not support rx-flip path any more.
This will now be used only by older guests who do not understand
the feature-rx-{copy,flip} feature flags.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletion(-)

diff -r af2155df2aed -r 66cdabe97205 
linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c
--- a/linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c Thu Oct 26 11:26:05 
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/netback/xenbus.c Thu Oct 26 11:50:17 
2006 +0100
@@ -93,10 +93,22 @@ static int netback_probe(struct xenbus_d
                        goto abort_transaction;
                }
 
+               /* We support rx-copy path. */
                err = xenbus_printf(xbt, dev->nodename,
                                    "feature-rx-copy", "%d", 1);
                if (err) {
-                       message = "writing feature-copying";
+                       message = "writing feature-rx-copy";
+                       goto abort_transaction;
+               }
+
+               /*
+                * We don't support rx-flip path (except old guests who don't
+                * grok this feature flag).
+                */
+               err = xenbus_printf(xbt, dev->nodename,
+                                   "feature-rx-flip", "%d", 0);
+               if (err) {
+                       message = "writing feature-rx-flip";
                        goto abort_transaction;
                }
 

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