SUNRPC: Retry wrap in case of memory allocation failure.

 For privacy we need to allocate extra pages to hold encrypted page data when
 wrapping requests.  This allocation may fail, and we handle that case by
 waiting and retrying.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 534274056329..702ede309b06 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -710,9 +710,16 @@ call_encode(struct rpc_task *task)
                 rpc_exit(task, -EIO);
                 return;
         }
-        if (encode != NULL)
-                task->tk_status = rpcauth_wrap_req(task, encode, req, p,
-                                task->tk_msg.rpc_argp);
+        if (encode == NULL)
+                return;
+
+        task->tk_status = rpcauth_wrap_req(task, encode, req, p,
+                        task->tk_msg.rpc_argp);
+        if (task->tk_status == -ENOMEM) {
+                /* XXX: Is this sane? */
+                rpc_delay(task, 3*HZ);
+                task->tk_status = -EAGAIN;
+        }
 }
 
 /*