firmware: vpd: Fix platform driver and device registration/unregistration

The driver exit function needs to unregister both platform device and
driver. Also, during registration, register driver first and perform
error checks.

Fixes: 049a59db34eb ("firmware: Google VPD sysfs driver")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/firmware/google/vpd.c b/drivers/firmware/google/vpd.c
index 942e358..e4b40f2 100644 (file)
--- a/drivers/firmware/google/vpd.c
+++ b/drivers/firmware/google/vpd.c
@@ -326,21 +326,29 @@ static struct platform_driver vpd_driver = {
        },
 };
 
+static struct platform_device *vpd_pdev;
+
 static int __init vpd_platform_init(void)
 {
-       struct platform_device *pdev;
+       int ret;
 
-       pdev = platform_device_register_simple("vpd", -1, NULL, 0);
-       if (IS_ERR(pdev))
-               return PTR_ERR(pdev);
+       ret = platform_driver_register(&vpd_driver);
+       if (ret)
+               return ret;
 
-       platform_driver_register(&vpd_driver);
+       vpd_pdev = platform_device_register_simple("vpd", -1, NULL, 0);
+       if (IS_ERR(vpd_pdev)) {
+               platform_driver_unregister(&vpd_driver);
+               return PTR_ERR(vpd_pdev);
+       }
 
        return 0;
 }
 
 static void __exit vpd_platform_exit(void)
 {
+       platform_device_unregister(vpd_pdev);
+       platform_driver_unregister(&vpd_driver);
 }
 
 module_init(vpd_platform_init);