depca: fix leaks in depca_module_init()

Since some of xxx_register_driver() can return error we must unregister
already registered drivers.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/depca.c

@@ -2061,18 +2061,35 @@ static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 
 static int __init depca_module_init (void)
 {
-        int err = 0;
+	int err = 0;
 
 #ifdef CONFIG_MCA
-        err = mca_register_driver (&depca_mca_driver);
+	err = mca_register_driver(&depca_mca_driver);
+	if (err)
+		goto err;
 #endif
 #ifdef CONFIG_EISA
-        err |= eisa_driver_register (&depca_eisa_driver);
+	err = eisa_driver_register(&depca_eisa_driver);
+	if (err)
+		goto err_mca;
 #endif
-	err |= platform_driver_register (&depca_isa_driver);
-	depca_platform_probe ();
+	err = platform_driver_register(&depca_isa_driver);
+	if (err)
+		goto err_eisa;
 
-        return err;
+	depca_platform_probe();
+	return 0;
+
+err_eisa:
+#ifdef CONFIG_EISA
+	eisa_driver_unregister(&depca_eisa_driver);
+err_mca:
+#endif
+#ifdef CONFIG_MCA
+	mca_unregister_driver(&depca_mca_driver);
+err:
+#endif
+	return err;
 }
 
 static void __exit depca_module_exit (void)