Input: ns558 - fix logic around pnp_register_driver()

Do not assume that pnp_register_driver() returns the number of
devices claimed.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/gameport/ns558.c b/drivers/input/gameport/ns558.c
index d2e55dc956bafd3477ebd4e7ea448263b6375fcd..3e2d28f263e9ad56c7b2cb7f3c4d697b28e849db 100644 (file)
--- a/drivers/input/gameport/ns558.c
+++ b/drivers/input/gameport/ns558.c
@@ -252,14 +252,14 @@ static struct pnp_driver ns558_pnp_driver;
 
 #endif
 
-static int pnp_registered = 0;
-
 static int __init ns558_init(void)
 {
        int i = 0;
+       int error;
 
-       if (pnp_register_driver(&ns558_pnp_driver) >= 0)
-               pnp_registered = 1;
+       error = pnp_register_driver(&ns558_pnp_driver);
+       if (error && error != -ENODEV)  /* should be ENOSYS really */
+               return error;
 
 /*
  * Probe ISA ports after PnP, so that PnP ports that are already
@@ -270,7 +270,7 @@ static int __init ns558_init(void)
        while (ns558_isa_portlist[i])
                ns558_isa_probe(ns558_isa_portlist[i++]);
 
-       return (list_empty(&ns558_list) && !pnp_registered) ? -ENODEV : 0;
+       return list_empty(&ns558_list) && error ? -ENODEV : 0;
 }
 
 static void __exit ns558_exit(void)
@@ -283,8 +283,7 @@ static void __exit ns558_exit(void)
                kfree(ns558);
        }
 
-       if (pnp_registered)
-               pnp_unregister_driver(&ns558_pnp_driver);
+       pnp_unregister_driver(&ns558_pnp_driver);
 }
 
 module_init(ns558_init);