1 files changed, 18 insertions, 5 deletions

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 23e10b6263d6..f7a4701bf863 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -1174,23 +1174,34 @@ static struct platform_driver cmos_platform_driver = {
         }
 };
 
+#ifdef CONFIG_PNP
+static bool pnp_driver_registered;
+#endif
+static bool platform_driver_registered;
+
 static int __init cmos_init(void)
 {
         int retval = 0;
 
 #ifdef  CONFIG_PNP
-        pnp_register_driver(&cmos_pnp_driver);
+        retval = pnp_register_driver(&cmos_pnp_driver);
+        if (retval == 0)
+                pnp_driver_registered = true;
 #endif
 
-        if (!cmos_rtc.dev)
+        if (!cmos_rtc.dev) {
                 retval = platform_driver_probe(&cmos_platform_driver,
                                                cmos_platform_probe);
+                if (retval == 0)
+                        platform_driver_registered = true;
+        }
 
         if (retval == 0)
                 return 0;
 
 #ifdef  CONFIG_PNP
-        pnp_unregister_driver(&cmos_pnp_driver);
+        if (pnp_driver_registered)
+                pnp_unregister_driver(&cmos_pnp_driver);
 #endif
         return retval;
 }
@@ -1199,9 +1210,11 @@ module_init(cmos_init);
 static void __exit cmos_exit(void)
 {
 #ifdef  CONFIG_PNP
-        pnp_unregister_driver(&cmos_pnp_driver);
+        if (pnp_driver_registered)
+                pnp_unregister_driver(&cmos_pnp_driver);
 #endif
-        platform_driver_unregister(&cmos_platform_driver);
+        if (platform_driver_registered)
+                platform_driver_unregister(&cmos_platform_driver);
 }
 module_exit(cmos_exit);