1 files changed, 4 insertions, 2 deletions

diff --git a/net/wanrouter/wanmain.c b/net/wanrouter/wanmain.c
index 9ab31a3ce3ad..b210a88d0960 100644
--- a/net/wanrouter/wanmain.c
+++ b/net/wanrouter/wanmain.c
@@ -350,9 +350,9 @@ __be16 wanrouter_type_trans(struct sk_buff *skb, struct net_device *dev)
  *      o execute requested action or pass command to the device driver
  */
 
-int wanrouter_ioctl(struct inode *inode, struct file *file,
-                unsigned int cmd, unsigned long arg)
+long wanrouter_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
+        struct inode *inode = file->f_path.dentry->d_inode;
         int err = 0;
         struct proc_dir_entry *dent;
         struct wan_device *wandev;
@@ -372,6 +372,7 @@ int wanrouter_ioctl(struct inode *inode, struct file *file,
         if (wandev->magic != ROUTER_MAGIC)
                 return -EINVAL;
 
+        lock_kernel();
         switch (cmd) {
         case ROUTER_SETUP:
                 err = wanrouter_device_setup(wandev, data);
@@ -403,6 +404,7 @@ int wanrouter_ioctl(struct inode *inode, struct file *file,
                         err = wandev->ioctl(wandev, cmd, arg);
                 else err = -EINVAL;
         }
+        unlock_kernel();
         return err;
 }