netpoll: call dev_put() on error in netpoll_setup()

There is a dev_put(ndev) missing on an error path.  This was
introduced in 0c1ad04aecb "netpoll: prevent netpoll setup on slave
devices".

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 42ea4b0e59f1..18d9cbda3a39 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -795,7 +795,8 @@ int netpoll_setup(struct netpoll *np)
         if (ndev->master) {
                 printk(KERN_ERR "%s: %s is a slave device, aborting.\n",
                        np->name, np->dev_name);
-                return -EBUSY;
+                err = -EBUSY;
+                goto put;
         }
 
         if (!netif_running(ndev)) {