From e07f679c750bef551cf8f545bdc6617e6bf15728 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Wed, 13 Aug 2008 02:55:05 +0000
Subject: [PATCH]  - Don't crash if we are already freed  - Some code frees the
 buffers right after an operation fails which is fine

svn path=/branches/aicom-network-fixes/; revision=35297
---
 drivers/network/afd/afd/lock.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/network/afd/afd/lock.c b/drivers/network/afd/afd/lock.c
index 1c7f5e2c63e..9874e18fb8f 100644
--- a/drivers/network/afd/afd/lock.c
+++ b/drivers/network/afd/afd/lock.c
@@ -112,6 +112,8 @@ VOID UnlockBuffers( PAFD_WSABUF Buf, UINT Count, BOOL Address ) {
     PAFD_MAPBUF Map = (PAFD_MAPBUF)(Buf + Count + Lock);
     UINT i;
 
+    if( !Buf ) return;
+
     for( i = 0; i < Count + Lock; i++ ) {
 	if( Map[i].Mdl ) {
 	    MmUnlockPages( Map[i].Mdl );