On Mon, 2009-01-19 at 10:10 +0900, Kenji Kaneshige wrote: > 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. Yes, len speculates the non hotplug buses are missing some acpi entries. > 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. Sure ... I'm travelling this week, but the machine is usually remotely accessible. James -- 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
