lec: Use rtnl lock/unlock when updating MTU

The LECS response contains the MTU that should be used. Correctly synchronize with other layers when updating. Signed-off-by: Chas Williams - CONTRACTOR <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ambv · Aug 21, 2014 · 6df378d · 6df378d
1 parent 02784f1
commit 6df378d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/atm/lec.c b/net/atm/lec.c
@@ -410,9 +410,11 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 		priv->lane2_ops = NULL;
 		if (priv->lane_version > 1)
 			priv->lane2_ops = &lane2_ops;
+		rtnl_lock();
 		if (dev_set_mtu(dev, mesg->content.config.mtu))
 			pr_info("%s: change_mtu to %d failed\n",
 				dev->name, mesg->content.config.mtu);
+		rtnl_unlock();
 		priv->is_proxy = mesg->content.config.is_proxy;
 		break;
 	case l_flush_tran_id: