Bug 173104

Summary: Invalid ACPI IRQ assignment on Fujitsu P2120 with RealTek Ethernet interface disabled
Product: [Fedora] Fedora Reporter: TC <tcwan>
Component: kernelAssignee: Dave Jones <davej>
Status: CLOSED UPSTREAM QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4CC: intel-linux-acpi, pfrields, wtogami
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2005-12-10 07:25:28 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Embargoed:
Bug Depends On:    
Bug Blocks: 165150    
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Description Flags
Default IRQ assignment when booting without 'acpi_irq_isa=10,11'
none
Interrupt assignment for correct behavior none

Description TC 2005-11-14 06:39:35 UTC 
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Description of problem:
This is a longstanding problem on Fujitsu P2120 notebooks, first reported by myself here: http://bugme.osdl.org/show_bug.cgi?id=1322. 

The IRQ assignment done by ACPI is not correct if the Ethernet interface is disabled on startup (running on battery mode). Prior to kernel 2.6.14, attempting to attach a USB device would result in a kernel hard-lock (need to remove power to recover). However, on 2.6.14, it gives an unhandled Interrupt driver crash debug information in dmesg, so perhaps some attempt to resolve this is possible.



Version-Release number of selected component (if applicable):
kernel-2.6.14

How reproducible:
Always

Steps to Reproduce:
1. Startup P2120 in battery-only mode (disables Ethernet device)
2. Check interrupt assignment for USB OHCI driver (invalid assignment to IRQ10)
3. Plug in USB device
  

Actual Results:  dmesg output indicate kernel module crashed

Expected Results:  Kernel USB driver module shouldn't crash
Driver should attempt to reset IRQ assignment (?)

Additional info:

Currently I boot with acpi_irq_isa=10,11 to force kernel to skip IRQ 10 for automatic assignment to USB OHCI driver.
Comment 1 TC 2005-11-14 06:42:54 UTC 
Created attachment 121011 [details]
Default IRQ assignment when booting without  'acpi_irq_isa=10,11'

IRQ 10 should never be assigned to USB OHCI devices, EHCI and OHCI devices
(except one placed on IRQ11) should be placed on IRQ9. This problem does not
occur if Ethernet device is enabled and activated.
Comment 2 TC 2005-11-14 06:43:49 UTC 
Created attachment 121012 [details]
Interrupt assignment for correct behavior
Comment 3 Dave Jones 2005-12-10 07:25:28 UTC 
this is something that really needs to be worked out upstream. Otherwise we'll
end up carrying a zillion patches to workaround broken bioses.   Either put up
with the boot command line, or try again to convince the upstream ACPI
maintainer that its necessary.