From ced6dfe9fc7128995c6d60627938944b430d82c8 Mon Sep 17 00:00:00 2001
From: Mi Jinlong <mijinlong@cn.fujitsu.com>
Date: Thu, 11 Nov 2010 18:03:50 +0800
Subject: [PATCH] NFS4.1: server gets drc mem fail should reply error at
 create_session

When server gets drc mem fail, it should reply error to client.

Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---
 fs/nfsd/nfs4state.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 9e7f8af12f8f..5d0ee0f0cb0e 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -749,6 +749,8 @@ static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct n
 	 */
 	slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached);
 	numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs);
+	if (numslots < 1)
+		return NULL;
 
 	new = alloc_session(slotsize, numslots);
 	if (!new) {