From: stephen hemminger <stephen@networkplumber.org>
Date: Fri, 14 Apr 2017 21:42:57 +0000 (-0700)
Subject: netvsc: fix RCU warning in get_stats
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=776e726bfb3493f71bb11759f7a60f1b0f6dd2d2;p=openwrt%2Fstaging%2Fblogic.git

netvsc: fix RCU warning in get_stats

The statistics functionis called with RTNL held during probe
but with RCU held during access from /proc and elsewhere.
This is safe so update the lockdep annotation.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 51fa90365348..97d0b5875cd5 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -943,7 +943,7 @@ static void netvsc_get_stats64(struct net_device *net,
 			       struct rtnl_link_stats64 *t)
 {
 	struct net_device_context *ndev_ctx = netdev_priv(net);
-	struct netvsc_device *nvdev = rcu_dereference(ndev_ctx->nvdev);
+	struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev);
 	int i;
 
 	if (!nvdev)