Regression since 2.6.15 - Cardbus system interrupt failure

[Larry Finger <Larry.Finger@lwfinger.net>]

I recently switched to v2.6.17-rc1 on my HP ze1115 notebook with a mobile AMD Duron stepping 01
processor. I found that none of my cardbus peripherals would work. The relevant lines from a dmesg 
output were:

ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKA] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI interrupt for device 0000:00:0a.0 disabled
yenta_cardbus: probe of 0000:00:0a.0 failed with error -12

I used 'git bisect' to localize the problem, which turned out to be the changes in commit 
b408cbc704352eccee301e1103b23203ba1c3a0e, which was made on March 23. When I revert this patch, my 
cardbus system behaves normally and the cardbus controller initialization is

ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKA] -> GSI 11 (level, low) -> IRQ 11
Yenta: CardBus bridge found at 0000:00:0a.0 [103c:0022]
Yenta O2: res at 0x94/0xD4: 00/ea
Yenta O2: enabling read prefetch/write burst
Yenta: ISA IRQ mask 0x0038, PCI irq 11
Socket status: 30000821

The memory map at the beginning of the dmesg buffer is

BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 0000000023ff0000 (usable)
 BIOS-e820: 0000000023ff0000 - 0000000023ffffc0 (ACPI data)
 BIOS-e820: 0000000023ffffc0 - 0000000024000000 (ACPI NVS)
 BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
575MB LOWMEM available.
On node 0 totalpages: 147440
  DMA zone: 4096 pages, LIFO batch:0
  Normal zone: 143344 pages, LIFO batch:31

Please let me know if there is any further information that is required or if there are patches to test.

Larry

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/