From a661b77fc12a172edea4b709e37f8cd58a6bd500 Mon Sep 17 00:00:00 2001
From: Chuck Lever <chuck.lever@oracle.com>
Date: Thu, 20 Dec 2007 14:54:42 -0500
Subject: [PATCH] NFS: Fix use of copy_to_user() in idmap_pipe_upcall

The idmap_pipe_upcall() function expects the copy_to_user() function to
return a negative error value if the call fails, but copy_to_user()
returns an unsigned long number of bytes that couldn't be copied.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
Reading git-format-patch failed