Description of problem:
On some systems, the ACPI bus check event can reference a bridge that is
higher in the ACPI hierarchy than the bridge immediately above the
hotplug PCI slot into which an adapter was just inserted. The current
'acpiphp' code expects the bus check event to reference the bridge
immediately above the slot that received the adapter so the hotplug
operation can fail on these systems with the message "acpiphp_glue:
cannot get bridge info".
Version-Release number of selected component (if applicable):
kernel 2.6.9-55.ELlargesmp SMP x86_64
Steps to Reproduce:
1. Vacate at least one hotplug PCIe slot and boot system.
2. Load the ACPI PCI hotplug driver:
# modprobe acpiphp
3. Attempt to hotplug a PCIe adapter.
4. Observe the "acpiphp_glue: cannot get bridge info" log
message and lack of power to the PCIe slot (green slot
LED is off).
Patch available in upstream and also backported to RHEL4 2.6.9-59.el
From 0bbd6424c55f0ab9e7fcd6a851bc49e265259ff5 Mon Sep 17 00:00:00 2001
From: Gary Hade <email@example.com>
Date: Thu, 5 Jul 2007 11:10:48 -0700
Subject: [PATCH] PCI: hotplug: acpiphp: avoid acpiphp "cannot get bridge info"
PCI hotplug failure
Created attachment 193511 [details]
Backported patch from upstream to RHEL4 2.6.9-59.el
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
Patch posted on RHKL.
Committed in 68.16.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.