[PATCH] tlclk: fix platform_device_register_simple() error check

[Akinobu Mita <akinobu.mita@gmail.com>]

The return value of platform_device_register_simple() should be
checked by IS_ERR().

This patch also fix misc_register() error case. Because misc_register()
returns error code.

Cc: Sebastien Bouchard <sebastien.bouchard@ca.kontron.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>

---
 drivers/char/tlclk.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Index: work-fault-inject/drivers/char/tlclk.c
===================================================================
--- work-fault-inject.orig/drivers/char/tlclk.c
+++ work-fault-inject/drivers/char/tlclk.c
@@ -792,15 +792,14 @@ static int __init tlclk_init(void)
 	ret = misc_register(&tlclk_miscdev);
 	if (ret < 0) {
 		printk(KERN_ERR "tlclk: misc_register returns %d.\n", ret);
-		ret = -EBUSY;
 		goto out3;
 	}
 
 	tlclk_device = platform_device_register_simple("telco_clock",
 				-1, NULL, 0);
-	if (!tlclk_device) {
+	if (IS_ERR(tlclk_device)) {
 		printk(KERN_ERR "tlclk: platform_device_register failed.\n");
-		ret = -EBUSY;
+		ret = PTR_ERR(tlclk_device);
 		goto out4;
 	}