net: sock_bindtodevice() RCU-ification
Avoid dev_hold()/dev_put() in sock_bindtodevice()
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/sock.c b/net/core/sock.c
index 5a51512..38820ea 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -420,14 +420,16 @@
if (devname[0] == '\0') {
index = 0;
} else {
- struct net_device *dev = dev_get_by_name(net, devname);
+ struct net_device *dev;
+ rcu_read_lock();
+ dev = dev_get_by_name_rcu(net, devname);
+ if (dev)
+ index = dev->ifindex;
+ rcu_read_unlock();
ret = -ENODEV;
if (!dev)
goto out;
-
- index = dev->ifindex;
- dev_put(dev);
}
lock_sock(sk);