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netvsc: fix rcu dereference warning from ethtool 

The ethtool info command calls the netvsc get_sset_count with RTNL
but not with RCU. Which causes warning:

drivers/net/hyperv/netvsc_drv.c:1010 suspicious rcu_dereference_check() usage!

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2017-06-07 15:53:47 -07:00 committed by David S. Miller
parent 8397ed36b7
commit fbd4c7e768
1 changed files with 1 additions and 1 deletions
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2
drivers/net/hyperv/netvsc_drv.c
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@ -1028,7 +1028,7 @@ static const struct {
static int netvsc_get_sset_count(struct net_device *dev, int string_set)
{
struct net_device_context *ndc = netdev_priv(dev);
struct netvsc_device *nvdev = rcu_dereference(ndc->nvdev);
struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev);
if (!nvdev)
return -ENODEV;