wext: Pull ioctl permission checking out into helper function.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 7 deletions

diff --git a/net/wireless/wext.c b/net/wireless/wext.c
index a1cd19add6d8..e96559ea0fb3 100644
--- a/net/wireless/wext.c
+++ b/net/wireless/wext.c
@@ -1061,18 +1061,26 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, unsigned i
         return -EOPNOTSUPP;
 }
 
+/* If command is `set a parameter', or `get the encoding parameters',
+ * check if the user has the right to do it.
+ */
+static int wext_permission_check(unsigned int cmd)
+{
+        if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)
+            && !capable(CAP_NET_ADMIN))
+                return -EPERM;
+
+        return 0;
+}
+
 /* entry point from dev ioctl */
 int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
                       void __user *arg)
 {
-        int ret;
+        int ret = wext_permission_check(cmd);
 
-        /* If command is `set a parameter', or
-         * `get the encoding parameters', check if
-         * the user has the right to do it */
-        if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)
-            && !capable(CAP_NET_ADMIN))
-                return -EPERM;
+        if (ret)
+                return ret;
 
         dev_load(net, ifr->ifr_name);
         rtnl_lock();