Bug 114943
| Summary: | acpi hotplug fails when PCI-PCI bridge involved | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 3 | Reporter: | Matthew Wilcox <willy> |
| Component: | kernel | Assignee: | Prarit Bhargava <prarit> |
| Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 3.0 | CC: | petrides, riel |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2007-03-23 15:55:08 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Matthew - any updates on this? User jparadis's account has been closed Closing as WONTFIX as RHEL3 series will only be taking critical fixes. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux ia64; en-US; rv:1.6) Gecko/20040122 Debian/1.6-1 Description of problem: There are actually several bugs in the acpiphp driver, but I'll limit myself to one here. The acpiphp driver has no understanding of PCI-PCI bridges and will merrily allocate IO resources already assigned to a bridge to another device on the same bus. Version-Release number of selected component (if applicable): kernel-2.4.21-9.EL How reproducible: Always Steps to Reproduce: 1. On an rx4640, plug a quad-port tulip card into slot 3 and a tg3 card into slot 4. 2. echo 0 >/proc/bus/pci/slots/4/power 3. echo 1 >/proc/bus/pci/slots/4/power Actual Results: Machine reboots Expected Results: Card should have been readded. Additional info: # lspci -v -s 80: 80:01.0 PCI bridge: Intel Corp. 21154 PCI-to-PCI Bridge (prog-if 00 [Normal decode]) Flags: bus master, medium devsel, latency 128 Bus: primary=80, secondary=81, subordinate=81, sec-latency=128 I/O behind bridge: 00008000-00008fff Memory behind bridge: c0000000-c01fffff Capabilities: [dc] Power Management version 1 80:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701 Gigabit Ethernet (rev 15) Subsystem: Hewlett-Packard Company: Unknown device 128a Flags: bus master, 66Mhz, medium devsel, latency 128, IRQ 58 Memory at 00000000c0200000 (64-bit, non-prefetchable) [size=64K] Capabilities: [40] PCI-X non-bridge device. Capabilities: [48] Power Management version 2 Capabilities: [50] Vital Product Data Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/3 Enable- The tulip cards behind the bridge are all assigned addresses in the 0xc010xxxx range, and the acpiphp driver only notices these resources, instead of paying attention to the PCI-PCI bridge resources. So when it comes to add the tg3 card, it looks for some available address space, and allocates 0xc000'0000 to 0xc001'0000 to it. Splat. I'm planning on working on this bug myself, filing it now for tracking purposes.