diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 004d3745dc453a1dcdb6f9eb32cd0a0499d85923..da9ecddf028a377c5c9446e2fdb1f297e9a37d2c 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2784,7 +2784,7 @@ void dbg_debugfs_exit(void)
 static int open_debugfs_file(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
-	return 0;
+	return nonseekable_open(inode, file);
 }
 
 static ssize_t write_debugfs_file(struct file *file, const char __user *buf,
@@ -2814,7 +2814,7 @@ static const struct file_operations dfs_fops = {
 	.open = open_debugfs_file,
 	.write = write_debugfs_file,
 	.owner = THIS_MODULE,
-	.llseek = default_llseek,
+	.llseek = no_llseek,
 };
 
 /**