From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Wed, 2 Feb 2011 21:42:58 +0000 (-0800)
Subject: staging: hv: Enable sending GARP packet after live migration
X-Git-Tag: v2.6.34.10~222
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=73699d1edf1765b9c52f668998b2201176ce1377;p=thirdparty%2Fkernel%2Fstable.git

staging: hv: Enable sending GARP packet after live migration

commit 7c161d0b900ea9bd9fc5ea5d3fa9916e9eb0dd88 upstream.

The hv_netvsc gets RNDIS_STATUS_MEDIA_CONNECT event after the VM
is live migrated. Adding call to netif_notify_peers() for this event
to send GARP (Gratuitous ARP) to notify network peers. Otherwise,
the VM's network connection may stop after a live migration.

This patch should also be applied to stable kernel 2.6.32 and later.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 91e413e5258a6..d6940f402400e 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -286,6 +286,7 @@ static void netvsc_linkstatus_callback(struct hv_device *device_obj,
 	if (status == 1) {
 		netif_carrier_on(net);
 		netif_wake_queue(net);
+		netif_notify_peers(net);
 	} else {
 		netif_carrier_off(net);
 		netif_stop_queue(net);