netback: Ignore duplicate notifications of frontend switch to

XenbusStateConnected.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

diff --git a/drivers/xen/netback/xenbus.c b/drivers/xen/netback/xenbus.c
index 2ce163b5fa257352a140eef81fcd380d01cf510f..d7faeb624d1d2718f7d410fd7027c17029f08e63 100644 (file)
--- a/drivers/xen/netback/xenbus.c
+++ b/drivers/xen/netback/xenbus.c
@@ -232,6 +232,8 @@ static void frontend_changed(struct xenbus_device *dev,
                break;
 
        case XenbusStateConnected:
+               if (dev->state == XenbusStateConnected)
+                       break;
                backend_create_netif(be);
                if (be->netif)
                        connect(be);