ax25: Add missing dev_put in ax25_setsockopt

ax25_setsockopt SO_BINDTODEVICE is missing a dev_put call in case of
success.  Re-order code to fix this bug.  While at it also reformat two
lines of code to comply with the Linux coding style.

Initial patch by Jarek Poplawski <jarkao2@gmail.com>.

Reported-by: Bernard Pidoux F6BVP <f6bvp@free.fr>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index fbcac76..4102de1 100644 (file)
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -641,15 +641,10 @@ static int ax25_setsockopt(struct socket *sock, int level, int optname,
 
        case SO_BINDTODEVICE:
                if (optlen > IFNAMSIZ)
-                       optlen=IFNAMSIZ;
-               if (copy_from_user(devname, optval, optlen)) {
-               res = -EFAULT;
-                       break;
-               }
+                       optlen = IFNAMSIZ;
 
-               dev = dev_get_by_name(&init_net, devname);
-               if (dev == NULL) {
-                       res = -ENODEV;
+               if (copy_from_user(devname, optval, optlen)) {
+                       res = -EFAULT;
                        break;
                }
 
@@ -657,12 +652,18 @@ static int ax25_setsockopt(struct socket *sock, int level, int optname,
                   (sock->state != SS_UNCONNECTED ||
                    sk->sk_state == TCP_LISTEN)) {
                        res = -EADDRNOTAVAIL;
-                       dev_put(dev);
+                       break;
+               }
+
+               dev = dev_get_by_name(&init_net, devname);
+               if (!dev) {
+                       res = -ENODEV;
                        break;
                }
 
                ax25->ax25_dev = ax25_dev_ax25dev(dev);
                ax25_fillin_cb(ax25, ax25->ax25_dev);
+               dev_put(dev);
                break;
 
        default: