[PATCH 3/5] nfs41: Retry delegation return if it failed with session error

[Ricardo Labiaga <Ricardo.Labiaga@netapp.com>]

Update nfs4_delegreturn_done() to retry the operation after setting the
NFS4CLNT_SESSION_SETUP bit to indicate the need to reset the session.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
---
 fs/nfs/nfs4proc.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6a8861c..53b0a7d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3490,9 +3490,20 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
 	nfs4_sequence_done(data->res.server, &data->res.seq_res,
 			task->tk_status);
 
-	data->rpc_status = task->tk_status;
-	if (data->rpc_status == 0)
+	switch (task->tk_status) {
+	case -NFS4ERR_STALE_STATEID:
+	case -NFS4ERR_EXPIRED:
+	case 0:
 		renew_lease(data->res.server, data->timestamp);
+		break;
+	default:
+		if (nfs4_async_handle_error(task, data->res.server, NULL) ==
+				-EAGAIN) {
+			nfs4_restart_rpc(task, data->res.server->nfs_client);
+			return;
+		}
+	}
+	data->rpc_status = task->tk_status;
 }
 
 static void nfs4_delegreturn_release(void *calldata)
-- 
1.5.4.3