watchdog: advantechwdt: Use platform_driver_probe

Using platform_driver_probe instead of platform_driver_register has
two benefits:
* The driver will fail to load if device probing fails.
* The probe function can be marked __init.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 9 insertions, 12 deletions

diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c
index a8961addc59c..7796db7fa6e1 100644
--- a/drivers/watchdog/advantechwdt.c
+++ b/drivers/watchdog/advantechwdt.c
@@ -238,7 +238,7 @@ static struct miscdevice advwdt_miscdev = {
  *      Init & exit routines
  */
 
-static int advwdt_probe(struct platform_device *dev)
+static int __init advwdt_probe(struct platform_device *dev)
 {
         int ret;
 
@@ -299,7 +299,6 @@ static void advwdt_shutdown(struct platform_device *dev)
 }
 
 static struct platform_driver advwdt_driver = {
-        .probe          = advwdt_probe,
         .remove         = advwdt_remove,
         .shutdown       = advwdt_shutdown,
         .driver         = {
@@ -314,21 +313,19 @@ static int __init advwdt_init(void)
 
         pr_info("WDT driver for Advantech single board computer initialising\n");
 
-        err = platform_driver_register(&advwdt_driver);
-        if (err)
-                return err;
-
         advwdt_platform_device = platform_device_register_simple(DRV_NAME,
                                                                 -1, NULL, 0);
-        if (IS_ERR(advwdt_platform_device)) {
-                err = PTR_ERR(advwdt_platform_device);
-                goto unreg_platform_driver;
-        }
+        if (IS_ERR(advwdt_platform_device))
+                return PTR_ERR(advwdt_platform_device);
+
+        err = platform_driver_probe(&advwdt_driver, advwdt_probe);
+        if (err)
+                goto unreg_platform_device;
 
         return 0;
 
-unreg_platform_driver:
-        platform_driver_unregister(&advwdt_driver);
+unreg_platform_device:
+        platform_device_unregister(advwdt_platform_device);
         return err;
 }