[PATCH] Fix debugfs_create_file's error checking method for arm/mach-ns9xxx

[Zhaolei <zhaolei@cn.fujitsu.com>]

Hi, 

debugfs_create_file() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
 arch/arm/mach-ns9xxx/clock.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-ns9xxx/clock.c b/arch/arm/mach-ns9xxx/clock.c
index 44ed20d..15945e9 100644
--- a/arch/arm/mach-ns9xxx/clock.c
+++ b/arch/arm/mach-ns9xxx/clock.c
@@ -208,7 +208,11 @@ static int __init clk_debugfs_init(void)
 
 	dentry = debugfs_create_file("clk", S_IFREG | S_IRUGO, NULL, NULL,
 			&clk_debugfs_operations);
-	return IS_ERR(dentry) ? PTR_ERR(dentry) : 0;
+	if (!dentry)
+		return -ENOMEM;
+	if (IS_ERR(dentry))
+		return PTR_ERR(dentry);
+	return 0;
 }
 subsys_initcall(clk_debugfs_init);
 
-- 
1.5.5.3