diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index cf0db00..acb3d63 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1598,7 +1598,7 @@
 			if (offset >= 0)
 				break;
 		default:
-			mutex_unlock(&file_inode(file)->i_mutex);
+			mutex_unlock(&dentry->d_inode->i_mutex);
 			return -EINVAL;
 	}
 	if (offset != file->f_pos) {