Fix debugfs_create_dir's error checking method for arch/sh/kernel/

debugfs_create_dir() 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>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 267b344099c0..836e80d5cb9f 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -554,6 +554,8 @@ struct dentry *sh_debugfs_root;
 static int __init sh_debugfs_init(void)
 {
         sh_debugfs_root = debugfs_create_dir("sh", NULL);
+        if (!sh_debugfs_root)
+                return -ENOMEM;
         if (IS_ERR(sh_debugfs_root))
                 return PTR_ERR(sh_debugfs_root);