[PATCH] tun - don't obscure error return from misc_register

[Stephen Hemminger <shemminger@xxxxxxxx>]

When Tun initialization fails it shouldn't obscure the error return, 
There are several reasons it could fail, and when diagnosing user problems
the error code might provide more info.

diff -Nru a/drivers/net/tun.c b/drivers/net/tun.c
--- a/drivers/net/tun.c Mon Mar 15 10:13:37 2004
+++ b/drivers/net/tun.c Mon Mar 15 10:13:37 2004
@@ -609,15 +609,15 @@
 
 int __init tun_init(void)
 {
+       int ret = 0;
+
        printk(KERN_INFO "Universal TUN/TAP device driver %s " 
               "(C)1999-2002 Maxim Krasnyansky\n", TUN_VER);
 
-       if (misc_register(&tun_miscdev)) {
+       ret = misc_register(&tun_miscdev);
+       if (ret)
                printk(KERN_ERR "tun: Can't register misc device %d\n", 
TUN_MINOR);
-               return -EIO;
-       }
-
-       return 0;
+       return ret;
 }
 
 void tun_cleanup(void)