Bug 2834 - 2.4.27-pre3 IRQ regression - IOAPIC SCI override
Summary: 2.4.27-pre3 IRQ regression - IOAPIC SCI override
Status: CLOSED CODE_FIX
Alias: None
Product: ACPI
Classification: Unclassified
Component: Config-Interrupts (show other bugs)
Hardware: i386 Linux
: P2 normal
Assignee: Len Brown
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2004-06-04 23:21 UTC by Len Brown
Modified: 2004-11-04 13:32 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.4.27-pre3
Subsystem:
Regression: ---
Bisected commit-id:

Attachments
2.4.27-pre3 test patch (1.72 KB, patch)
2004-06-04 23:28 UTC, Len Brown 		Details | Diff
Add an attachment (proposed patch, testcase, etc.)

Description Len Brown 2004-06-04 23:21:20 UTC 
David van Hoose reports that interrupts broke in 2.4.27-pre3: 
 
interrupts-2.4.27-pre2: 
 
           CPU0        
  0:       6956    IO-APIC-edge  timer 
  1:        136    IO-APIC-edge  keyboard 
  2:          0          XT-PIC  cascade 
  7:          2    IO-APIC-edge  parport0 
  8:          1    IO-APIC-edge  rtc 
 14:         25    IO-APIC-edge  ide0 
 15:        683    IO-APIC-edge  ide1 
 16:      11868   IO-APIC-level  ft3xx, nvidia 
 17:          2   IO-APIC-level  ohci1394 
 18:          0   IO-APIC-level  SiS SI7012 
 19:         20   IO-APIC-level  eth0 
 20:         41   IO-APIC-level  acpi, usb-ohci 
 21:          0   IO-APIC-level  usb-ohci 
 22:         72   IO-APIC-level  usb-ohci 
 23:          0   IO-APIC-level  ehci_hcd 
NMI:          0  
LOC:       6907  
ERR:          0 
MIS:          0 
 
interrupts-2.4.27-pre3 
 
           CPU0        
  0:      46794  local-APIC-edge  timer 
  1:       1760    IO-APIC-edge  keyboard 
  7:          2    IO-APIC-edge  parport0 
  8:          1    IO-APIC-edge  rtc 
 14:         25    IO-APIC-edge  ide0 
 15:        683    IO-APIC-edge  ide1 
 16:      18090   IO-APIC-level  ft3xx, nvidia 
 17:          3   IO-APIC-level  ohci1394 
 18:          0   IO-APIC-level  SiS SI7012 
 19:         30   IO-APIC-level  eth0 
 20:          0            none  acpi, usb-ohci 
 21:          0   IO-APIC-level  usb-ohci 
 22:         67   IO-APIC-level  usb-ohci 
 23:          0   IO-APIC-level  ehci_hcd 
NMI:          0  
LOC:      46744  
ERR:          0 
MIS:          0 
 
IRQ20 has no handler type, and the devices attached do not respond.
Comment 1 Len Brown 2004-06-04 23:28:36 UTC 
Created attachment 3079 [details]
2.4.27-pre3 test patch

The root cause appears to be that 2.4/i386 dynamically allocates mp_irqs[]
so the fix to bug 2520 caused us to write into mp_irqs[] before it was
allocated
and thus the interrupt source over-ride information was lost.

This patch simply allocates mp_irqs[] earlier.
Comment 2 Len Brown 2004-11-04 13:32:33 UTC 
shipped in 2.4.27 - closing
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