failover: change mtu has RTNL

When changing MTU, RTNL is held so use rtnl_dereference instead of rcu_dereference. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
alxsad · Jul 29, 2018 · 3260155 · 3260155
1 parent 4b09384
commit 3260155
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/drivers/net/net_failover.c b/drivers/net/net_failover.c
@@ -220,14 +220,14 @@ static int net_failover_change_mtu(struct net_device *dev, int new_mtu)
 	struct net_device *primary_dev, *standby_dev;
 	int ret = 0;
 
-	primary_dev = rcu_dereference(nfo_info->primary_dev);
+	primary_dev = rtnl_dereference(nfo_info->primary_dev);
 	if (primary_dev) {
 		ret = dev_set_mtu(primary_dev, new_mtu);
 		if (ret)
 			return ret;
 	}
 
-	standby_dev = rcu_dereference(nfo_info->standby_dev);
+	standby_dev = rtnl_dereference(nfo_info->standby_dev);
 	if (standby_dev) {
 		ret = dev_set_mtu(standby_dev, new_mtu);
 		if (ret) {