uml: Eliminate temporary buffer in eth_configure

Avoid using the temporary buffer introduced by previous patch to hold the
device name.

Btw, avoid leaking device on an error path.  Other error paths may need
cleanup.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 12 deletions

diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index cd466e30af67..3f5e8e634308 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -348,17 +348,24 @@ static void eth_configure(int n, void *init, char *mac,
         struct net_device *dev;
         struct uml_net_private *lp;
         int save, err, size;
-        char name[sizeof(dev->name)];
 
         size = transport->private_size + sizeof(struct uml_net_private) +
                 sizeof(((struct uml_net_private *) 0)->user);
 
         device = kzalloc(sizeof(*device), GFP_KERNEL);
         if (device == NULL) {
-                printk(KERN_ERR "eth_configure failed to allocate uml_net\n");
+                printk(KERN_ERR "eth_configure failed to allocate struct "
+                       "uml_net\n");
                 return;
         }
 
+        dev = alloc_etherdev(size);
+        if (dev == NULL) {
+                printk(KERN_ERR "eth_configure: failed to allocate struct "
+                       "net_device for eth%d\n", n);
+                goto out_free_device;
+        }
+
         INIT_LIST_HEAD(&device->list);
         device->index = n;
 
@@ -366,9 +373,9 @@ static void eth_configure(int n, void *init, char *mac,
          * netdevice, that is OK, register_netdev{,ice}() will notice this
          * and fail.
          */
-        snprintf(name, sizeof(name), "eth%d", n);
+        snprintf(dev->name, sizeof(dev->name), "eth%d", n);
 
-        setup_etheraddr(mac, device->mac, name);
+        setup_etheraddr(mac, device->mac, dev->name);
 
         printk(KERN_INFO "Netdevice %d ", n);
         printk("(%02x:%02x:%02x:%02x:%02x:%02x) ",
@@ -376,11 +383,6 @@ static void eth_configure(int n, void *init, char *mac,
                device->mac[2], device->mac[3],
                device->mac[4], device->mac[5]);
         printk(": ");
-        dev = alloc_etherdev(size);
-        if (dev == NULL) {
-                printk(KERN_ERR "eth_configure: failed to allocate device\n");
-                goto out_free_device;
-        }
 
         lp = dev->priv;
         /* This points to the transport private data. It's still clear, but we
@@ -399,7 +401,6 @@ static void eth_configure(int n, void *init, char *mac,
                 goto out_free_netdev;
         SET_NETDEV_DEV(dev,&device->pdev.dev);
 
-        strcpy(dev->name, name);
         device->dev = dev;
 
         /*
@@ -466,13 +467,13 @@ static void eth_configure(int n, void *init, char *mac,
         return;
 
 out_undo_user_init:
-        if (transport->user->init != NULL)
+        if (transport->user->remove != NULL)
                 (*transport->user->remove)(&lp->user);
 out_unregister:
         platform_device_unregister(&device->pdev);
 out_free_netdev:
         free_netdev(dev);
-out_free_device: ;
+out_free_device:
         kfree(device);
 }