James Bottomley wrote: > On Fri, 2009-01-16 at 15:07 +0900, Kenji Kaneshige wrote: >>> It looks like acpi_pci_get_bridge_handle() is returning NULL, so this is >>> the fix that works for me. >>> >> I'm sorry for troubling you, and thank you for your patience. >> >> The patch seems to avoid the kernel panic, but I still don't know >> why acpi_pci_get_bridge_handle() returns NULL here. I assumed >> it should return non-NULL value here. So I'd like to investigate >> it more. > > Sure, Len and I couldn't work out why it was returning NULL on this box > (other than that perhaps it doesn't have an ACPI entry). The two > offending busses which trigger this are the two internal ones (which > aren't hotplug). The layout of the box is: > > sparkweed:~# lspci -t > -+-[0000:0c]---00.0 > +-[0000:0a]---00.0 > +-[0000:08]---00.0 > +-[0000:06]---00.0 > +-[0000:04]---00.0 > +-[0000:02]---00.0 > +-[0000:01]-+-00.0 > | +-01.0 > | +-01.1 > | \-02.0 > \-[0000:00]-+-00.0 > +-01.0 > +-03.0 > +-03.1 > +-03.2 > +-0f.0 > +-0f.1 > \-0f.3 > sparkweed:~# lspci > 00:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 00:01.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY > [Radeon 7000/VE] > 00:03.0 USB Controller: NEC Corporation USB (rev 43) > 00:03.1 USB Controller: NEC Corporation USB (rev 43) > 00:03.2 USB Controller: NEC Corporation USB 2.0 (rev 04) > 00:0f.0 Host bridge: Broadcom CSB6 South Bridge (rev a0) > 00:0f.1 IDE interface: Broadcom CSB6 RAID/IDE Controller (rev a0) > 00:0f.3 ISA bridge: Broadcom GCLE-2 Host Bridge > 01:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 01:01.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 > Gigabit Ethernet (rev 10) > 01:01.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5704 > Gigabit Ethernet (rev 10) > 01:02.0 SCSI storage controller: Adaptec AIC-9410W SAS (Razor ASIC > non-RAID) (rev 08) > 02:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 04:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 06:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 08:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 0a:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > 0c:00.0 Host bridge: IBM Calgary PCI-X Host Bridge (rev 02) > > And when I annotate the problem, the two busses returning NULL are > 0000:00 and 0000:01 > Thank you very much for the information. It seems there are something special in the data structure of host bridge for 0000:00 and 0000:01. I'm making a debug patch now and will send it to you as soon as possible. I'm sorry to trouble you, but could you try it later. Thanks, Kenji Kaneshige -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
