Messages in this thread |  | | | Subject | Re: 2.6.25-rc8-mm1 panic in rpaphp_register_slot() | | From | Badari Pulavarty <> | | Date | Fri, 04 Apr 2008 16:35:28 -0700 |
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On Fri, 2008-04-04 at 16:42 -0600, Alex Chiang wrote: > * Badari Pulavarty <pbadari@us.ibm.com>: > > > > On Fri, 2008-04-04 at 12:05 -0600, Alex Chiang wrote: > > > Hi Badari, > > > > > > * Badari Pulavarty <pbadari@us.ibm.com>: > > > > Hi Andrew & Alex, > > > > > > > > I get following panic in rpaphp_register_slot() on > > > > 2.6.25-rc8-mm1. Known issue ? > > > > > > I know about it now... :-/ > > > > > > Any chance you could turn debugging on for both rpaphp and > > > pci_hotplug? > > > > > > > I did set "debug" variables in rpaphp_core.c and pci_hotplug_core.c > > to 1. But it didn't give any more information. How do I enable > > the debug ? > > If those modules are built into your kernel, then you'll need to > modify the kernel command line to add: > > rpaphp.debug=1 pci_hotplug.debug=1 > > If you're manually modprobing them: > > $ modprobe pci_hotplug debug=1 > $ modprobe rpaphp debug=1 > > > I just changed dbg() to printk() in rpaphp_register_slot() to > > print out more information. > > > > Thanks, > > Badari > > > > > > pci_hotplug: PCI Hot Plug PCI Core version: 0.5 > > rpaphp: RPA HOT Plug PCI Controller Driver version: 0.1 > > rpaphp_register_slot registering slot:path[/pci@800000020000003/pci@2,4] index[22010003], name[U787E.001.AAA3015-P2-C1] pdomain[22010003] type[16] > > Unable to handle kernel paging request for data at address 0x00000070 > > Hrm, this is a little more information, but still not quite > enough. I'm going to take a stab in the dark and say I'm probably > doing something wrong on this line, maybe dereferencing a pointer > incorrectly: > > retval = pci_hp_register(php_slot, slot->bus, > PCI_SLOT(PCI_DN(slot->dn->child)->devfn)); >
Sorry. I thought you knew this already. Disassembly clearly showed that slot->dn->child is NULL.
I confirmed it by adding printk also.
Thanks, Badari
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