debugfs_create_*() returns NULL on error.  Make its callers return -ENODEV
on error.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Acked-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
        struct dentry *d;
 
        d = debugfs_create_dir("mips", NULL);
-       if (IS_ERR(d))
-               return PTR_ERR(d);
+       if (!d)
+               return -ENOMEM;
        mips_debugfs_dir = d;
        return 0;
 }
 
                return -ENODEV;
        d = debugfs_create_u32("unaligned_instructions", S_IRUGO,
                               mips_debugfs_dir, &unaligned_instructions);
-       if (IS_ERR(d))
-               return PTR_ERR(d);
+       if (!d)
+               return -ENOMEM;
        d = debugfs_create_u32("unaligned_action", S_IRUGO | S_IWUSR,
                               mips_debugfs_dir, &unaligned_action);
-       if (IS_ERR(d))
-               return PTR_ERR(d);
+       if (!d)
+               return -ENOMEM;
        return 0;
 }
 __initcall(debugfs_unaligned);