This reverts commit 
80e60639f1b7c121a7fea53920c5a4b94009361a.
This change requires further fixes to ensure that the open doesn't
succeed if the lookup later results in a regular file being created.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
                                res = NULL;
                                goto out;
                        /* This turned out not to be a regular file */
-                       case -EISDIR:
                        case -ENOTDIR:
                                goto no_open;
                        case -ELOOP:
                                if (!(nd->intent.open.flags & O_NOFOLLOW))
                                        goto no_open;
+                       /* case -EISDIR: */
                        /* case -EINVAL: */
                        default:
                                res = ERR_CAST(inode);