1 files changed, 11 insertions, 15 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 63f6917..e7821ba 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -259,35 +259,31 @@ static struct ip_tunnel * ipgre_tunnel_locate(struct ip_tunnel_parm *parms, int
 
 	if (parms->name[0])
 		strlcpy(name, parms->name, IFNAMSIZ);
-	else {
-		int i;
-		for (i=1; i<100; i++) {
-			sprintf(name, "gre%d", i);
-			if (__dev_get_by_name(&init_net, name) == NULL)
-				break;
-		}
-		if (i==100)
-			goto failed;
-	}
+	else
+		sprintf(name, "gre%%d");
 
 	dev = alloc_netdev(sizeof(*t), name, ipgre_tunnel_setup);
 	if (!dev)
 	  return NULL;
 
+	if (strchr(name, '%')) {
+		if (dev_alloc_name(dev, name) < 0)
+			goto failed_free;
+	}
+
 	dev->init = ipgre_tunnel_init;
 	nt = netdev_priv(dev);
 	nt->parms = *parms;
 
-	if (register_netdevice(dev) < 0) {
-		free_netdev(dev);
-		goto failed;
-	}
+	if (register_netdevice(dev) < 0)
+		goto failed_free;
 
 	dev_hold(dev);
 	ipgre_tunnel_link(nt);
 	return nt;
 
-failed:
+failed_free:
+	free_netdev(dev);
 	return NULL;
 }