[PATCH Cthon2011 fixes 1/3] NFSv4.1: Retry CREATE_SESSION on NFS4ERR_DELAY

[andros@netapp.com]

From: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>

Fix bug where we currently retry the EXCHANGEID call again, eventhough
we already have a valid clientid.  Instead, delay and retry the CREATE_SESSION
call.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
---
 fs/nfs/nfs4proc.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 36b3c44..8edb1fc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5083,10 +5083,20 @@ int nfs4_proc_create_session(struct nfs_client *clp)
 	int status;
 	unsigned *ptr;
 	struct nfs4_session *session = clp->cl_session;
+	long timeout = 0;
+	int err;
 
 	dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
 
-	status = _nfs4_proc_create_session(clp);
+	do {
+		status = _nfs4_proc_create_session(clp);
+		if (status == -NFS4ERR_DELAY) {
+			err = nfs4_delay(clp->cl_rpcclient, &timeout);
+			if (err)
+				status = err;
+		}
+	} while (status == -NFS4ERR_DELAY);
+
 	if (status)
 		goto out;
 
-- 
1.6.6