linux-kernel - regression, 2.6.26-rc7, pnp: quirk_system_pci

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Date:	Sat, 21 Jun 2008 04:12:24 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: regression, 2.6.26-rc7, pnp: quirk_system_pci_resources()

Hi Bjorn.

I have been running with pnpacpi=off due to testing ISAPnP/PnPBIOS but 
when testing some other ACPI related problem tonight I removed that and 
found that unfortunately something seems to have regressed. My soundcard 
driver (snd-es1968) won't load anymore on current mainline:

===
ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKC] -> GSI 10 (level, 
low) -> IRQ 10
PCI: Unable to reserve I/O region #1:100@...0 for device 0000:00:0a.0
ACPI: PCI interrupt for device 0000:00:0a.0 disabled
ES1968 (ESS Maestro): probe of 0000:00:0a.0 failed with error -16
===

00:01 (PNP0c02) is keeping its I/O region occupied:

===
# cat /sys/bus/pnp/devices/00\:01/resources
state = active
io 0xde00-0xde03
===

Sound used to work back when I wasn't yet booting with pnpacpi=off but I 
don't quite recall when I started doing that nor have I looked yet at 
why quirk_system_pci_resources() isn't doing its job. I'll investigate 
if you need me to but thought I'd first throw a heap of information your 
way and hope you'll have a patch for me when I wake up :-/

This is vanilla mainline, 2.6.26-rc7. dmesg, dmesg with pnpacpi=off, 
lspci -vv and .config attached.

Also available at

http://members.home.nl/rene.herman/2.6.26-rc7/

Rene.

View attachment "dmesg-2.6.26-rc7-7ixe4" of type "text/plain" (20928 bytes)

View attachment "dmesg-2.6.26-rc7-7ixe4-pnpbios" of type "text/plain" (21172 bytes)

View attachment "lspci-2.6.26-rc7-7ixe4" of type "text/plain" (7967 bytes)

View attachment "config-2.6.26-rc7-7ixe4" of type "text/plain" (43850 bytes)