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hv_netvsc: Fix a warning of suspicious RCU usage 

This fixes a warning of "suspicious rcu_dereference_check() usage"
when nload runs.

Fixes: 776e726bfb ("netvsc: fix RCU warning in get_stats")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dexuan Cui 2019-08-09 01:58:08 +00:00 committed by David S. Miller
parent 9566e650bf
commit 6d0d779dca
1 changed files with 7 additions and 2 deletions
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9
drivers/net/hyperv/netvsc_drv.c
View File

@ -1239,12 +1239,15 @@ 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_rtnl(ndev_ctx->nvdev);
struct netvsc_device *nvdev;
struct netvsc_vf_pcpu_stats vf_tot;
int i;
rcu_read_lock();
nvdev = rcu_dereference(ndev_ctx->nvdev);
if (!nvdev)
return;
goto out;
netdev_stats_to_stats64(t, &net->stats);
@ -1283,6 +1286,8 @@ static void netvsc_get_stats64(struct net_device *net,
t->rx_packets += packets;
t->multicast += multicast;
}
out:
rcu_read_unlock();
}
static int netvsc_set_mac_addr(struct net_device *ndev, void *p)