if ((err = platform_driver_register(&sa11xx_uda1341_driver)) < 0)
                return err;
        device = platform_device_register_simple(SA11XX_UDA1341_DRIVER, -1, NULL, 0);
-       if (IS_ERR(device)) {
-               platform_driver_unregister(&sa11xx_uda1341_driver);
-               return PTR_ERR(device);
-       }
-       return 0;
+       if (!IS_ERR(device)) {
+               if (platform_get_drvdata(device))
+                       return 0;
+               platform_device_unregister(device);
+               err = -ENODEV
+       } else
+               err = PTR_ERR(device);
+       platform_driver_unregister(&sa11xx_uda1341_driver);
+       return err;
 }
 
 static void __exit sa11xx_uda1341_exit(void)
 
                                                         i, NULL, 0);
                if (IS_ERR(device))
                        continue;
+               if (!platform_get_drvdata(device)) {
+                       platform_device_unregister(device);
+                       continue;
+               }
                devices[i] = device;
                cards++;
        }
 
                                                         i, NULL, 0);
                if (IS_ERR(device))
                        continue;
+               if (!platform_get_drvdata(device)) {
+                       platform_device_unregister(device);
+                       continue;
+               }
                platform_devices[i] = device;
                snd_mpu401_devices++;
        }
 
                return err;
 
        device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
-       if (IS_ERR(device)) {
-               platform_driver_unregister(&snd_mtpav_driver);
-               return PTR_ERR(device);
-       }
-       return 0;
+       if (!IS_ERR(device)) {
+               if (platform_get_drvdata(device))
+                       return 0;
+               platform_device_unregister(device);
+               err = -ENODEV;
+       } else
+               err = PTR_ERR(device);
+       platform_driver_unregister(&snd_mtpav_driver);
+       return err;
 }
 
 static void __exit alsa_card_mtpav_exit(void)
 
                                                         i, NULL, 0);
                if (IS_ERR(device))
                        continue;
+               if (!platform_get_drvdata(device)) {
+                       platform_device_unregister(device);
+                       continue;
+               }
                devices[i] = device;
                cards++;
        }
 
                                                         i, NULL, 0);
                if (IS_ERR(device))
                        continue;
+               if (!platform_get_drvdata(device)) {
+                       platform_device_unregister(device);
+                       continue;
+               }
                devices[i] = device;
                cards++;
        }
 
        if ((err = platform_driver_register(&snd_pmac_driver)) < 0)
                return err;
        device = platform_device_register_simple(SND_PMAC_DRIVER, -1, NULL, 0);
-       if (IS_ERR(device)) {
-               platform_driver_unregister(&snd_pmac_driver);
-               return PTR_ERR(device);
-       }
-       return 0;
+       if (!IS_ERR(device)) {
+               if (platform_get_drvdata(device))
+                       return 0;
+               platform_device_unregister(device);
+               err = -ENODEV;
+       } else
+               err = PTR_ERR(device);
+       platform_driver_unregister(&snd_pmac_driver);
+       return err;
 
 }