[PATCH net-next] Revert "tun: call dev_get_valid_name() before register_netdevice()"

[Eric Dumazet]

This reverts commit 0ad646c81b2182f7fa67ec0c8c825e0ee165696d.

As noticed by Jakub, this is no longer needed after
commit 11fc7d5a0a2d ("tun: fix memory leak in error path")

This no longer exports dev_get_valid_name() for the exclusive
use of tun driver.

Suggested-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 drivers/net/tun.c         | 3 ---
 include/linux/netdevice.h | 3 ---
 net/core/dev.c            | 5 ++---
 3 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 
1e541b08b136364302aa524e31efb62062c43faa..0413d182d7821ca5bac794df43717149d78a6117
 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2788,9 +2788,6 @@ static int tun_set_iff(struct net *net, struct file 
*file, struct ifreq *ifr)
 
                if (!dev)
                        return -ENOMEM;
-               err = dev_get_valid_name(net, dev, name);
-               if (err < 0)
-                       goto err_free_dev;
 
                dev_net_set(dev, net);
                dev->rtnl_link_ops = &tun_link_ops;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 
fe45b2c72315f422dfa1b1e74a033777dd83fa21..3207e0b9ec4e3065a4a364b676e3ff3101719fa5
 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4113,9 +4113,6 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, 
const char *name,
                                    unsigned char name_assign_type,
                                    void (*setup)(struct net_device *),
                                    unsigned int txqs, unsigned int rxqs);
-int dev_get_valid_name(struct net *net, struct net_device *dev,
-                      const char *name);
-
 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
        alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
 
diff --git a/net/core/dev.c b/net/core/dev.c
index 
7d05e042c6bade23c3f253cf73a4f51b9cf71fd7..8bc3dce71fc08e80cfaa151576ff7b8503796791
 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1249,8 +1249,8 @@ int dev_alloc_name(struct net_device *dev, const char 
*name)
 }
 EXPORT_SYMBOL(dev_alloc_name);
 
-int dev_get_valid_name(struct net *net, struct net_device *dev,
-                      const char *name)
+static int dev_get_valid_name(struct net *net, struct net_device *dev,
+                             const char *name)
 {
        BUG_ON(!net);
 
@@ -1266,7 +1266,6 @@ int dev_get_valid_name(struct net *net, struct net_device 
*dev,
 
        return 0;
 }
-EXPORT_SYMBOL(dev_get_valid_name);
 
 /**
  *     dev_change_name - change name of a device
-- 
2.23.0.581.g78d2f28ef7-goog