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: v2.6.37.1~229
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8184d7cea8b22cddd7f9baee58a15f9178fec9e9;p=users%2Fdwmw2%2Flinux.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>
---

diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 3a8f6020ee5c0..cb79dff19b423 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -233,6 +233,7 @@ 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);