From 977d17bb1749517b353874ccdc9b85abc7a58c2a Mon Sep 17 00:00:00 2001
From: Yinghai Lu <yinghai@kernel.org>
Date: Fri, 22 Jan 2010 01:02:24 -0800
Subject: [PATCH] PCI: update bridge resources to get more big ranges in PCI
 assign unssigned

BIOS separates IO ranges between several IOHs, and on some slots, BIOS assigns
resources to a bridge, but stops assigning resources to the device under that
bridge, because the device needs a big resource.

So:
  1. allocate resources and record the failed device resources
  2. clear the BIOS assigned resources of the parent bridge of failing device
  3. go back and call pci assign unassigned
  4. if it still fails, go up the tree, clear more bridges. and try again

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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