decnet: avoid touching device refcount in dn_dev_by_index()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 4 deletions

diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index 6e1f085db06..d82694d930b 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -600,15 +600,17 @@ static void dn_dev_check_default(struct net_device *dev)
                 dev_put(dev);
 }
 
+/*
+ * Called with RTNL
+ */
 static struct dn_dev *dn_dev_by_index(int ifindex)
 {
         struct net_device *dev;
         struct dn_dev *dn_dev = NULL;
-        dev = dev_get_by_index(&init_net, ifindex);
-        if (dev) {
+
+        dev = __dev_get_by_index(&init_net, ifindex);
+        if (dev)
                 dn_dev = dev->dn_ptr;
-                dev_put(dev);
-        }
 
         return dn_dev;
 }