Re: Latest bk kernel does not properly free PCI IO & MEM allocations

[Prarit Bhargava <prarit@sgi.com>]

Greg KH wrote:

>>I tracked down the issue to the following:
>>
>>When pci_remove_bus_device is called on the device in the slot (should be a 
>>safe thing to do) both the pci_driver remove function for a device and the 
>>function pci_free_resources are called.
>>
>>In the case of the QLA2x00 driver, the driver's remove function calls
>>pci_release_regions.  This function releases the IO & MEM allocs for the pci
>>device and kfree's them.
>>
>>As previously mentioned, pci_free_resources is called.  This function 
>>attempts to use and free IO & MEM allocs for the pci device.
>>    
>>
>
>Where does it attempt to use it?  I see a loop to free the resources,
>not anything else.
>
>  
>
Sorry -- I confused you.  I meant "use and then free" in that it uses 
kfree'd memory and then attempts to free the resources. 

>Also, if you enable slab debugging, does this always occur?
>  
>
Haven't tried that ... I'll give it a shot and report back to the list.

>And, this should be brought up on the linux-pci mailing list, not the
>hotplug list.
>
>  
>
I'll defer to your judgement on that :)  Given the code paths above it 
seemed to be a hotplug issue to me :)

>thanks,
>
>  
>
Thanks for your reply -- I'll turn on slab debug and see what happens...

>greg k-h
>
>
>  
>
P.

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