PCI Failed to allocate mem for PCI ROM

Kumar Gala galak at kernel.crashing.org
Sat Jan 12 02:41:17 EST 2008

On Jan 11, 2008, at 3:13 AM, Jiri Slaby wrote:

> On 01/11/2008 10:07 AM, Kumar Gala wrote:
>> On Jan 11, 2008, at 2:41 AM, Jiri Slaby wrote:
>>> On 01/11/2008 09:29 AM, Kumar Gala wrote:
>>>> Greg,
>>>> I'm getting the following message from the kernel on an embedded  
>>>> ppc32 system:
>>>> PCI: Failed to allocate mem resource #9:100000 at e0000000 for  
>>>> 0000:00:00.0
>>>> The HW setup is a PCIe host controller and an e1000 NIC card.  It  
>>>> appears that pci_bus_assign_resources() is trying to call  
>>>> pci_assign_resource() for the ROM and the resource for the ROM is  
>>>> [100000:1fffff] where the PHB is [c0000000:dfffffff].
>>>> It seems like the resno that pci_assign_resource is getting  
>>>> called with is wrong and thus pci_update_resource() doesn't get  
>>>> called.
>>>> any ideas?
>>> Kernel version, please.
>> Sorry, its 2.6.24-rc7 + some ppc patches queued for 2.6.25
> Could you try this patch?
> http://git.kernel.org/?p=linux/kernel/git/gregkh/patches.git;a=blob_plain;f=pci/pci-remove-default-pci-expansion-rom-memory-allocation.patch
> Greg: is this 2.6.25 material, please? We need this for SP2.

I saw that patch, but if you notice that its just x86 specific and I'm  
having the issue on a powerpc 32-bit system.

- k

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