From a34041af9e2167e56035a801c384687fcb05a577 Mon Sep 17 00:00:00 2001
From: Patrick Farrell <paf@cray.com>
Date: Sun, 27 Apr 2014 13:06:25 -0400
Subject: [PATCH] staging/lustre/ptlrpc: Fix assertion failure of
 null_alloc_rs()

lustre_get_emerg_rs() set the size of the reply buffer to zero
by mistake, which will cause LBUG in null_alloc_rs() when memory
pressure is high. This patch fix this problem and adds a size
check to avoid the problem of insufficient buffer size.

Signed-off-by: Li Xi <lixi@ddn.com>
Signed-off-by: Patrick Farrell <paf@cray.com>
Reviewed-on: http://review.whamcloud.com/8200
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3680
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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