[1/2] powerpc/pseries: Fix corrupted pdn list

[Gavin Shan]

On Fri, Aug 28, 2015 at 11:32:40AM +1000, Michael Ellerman wrote:
>On Fri, 2015-08-28 at 11:09 +1000, Gavin Shan wrote:
>> On Fri, Aug 28, 2015 at 10:55:35AM +1000, Michael Ellerman wrote:
>> >On Thu, 2015-27-08 at 04:12:36 UTC, Gavin Shan wrote:
>> >> Commit cca87d30 ("powerpc/pci: Refactor pci_dn") introduced pdn
>> >> list for SRIOV VFs. It means the pdn is be put into the child list
>> >> of its parent pdn when the pdn is created. When doing PCI hot
>> >> unplugging on pSeries, the PCI device node as well as its pdn are
>> >> released through procfs entry "powerpc/ofdt". Some one else grabs
>> >> the memory chunk of the pdn and update it accordingly. At the same
>> >> time, the pdn is still tracked in the child list of parent pdn. It
>> >> leads to corrupted child list in the parent pdn.
>> >> 
>> >> This fixes above issue by removing the pdn from the child list of
>> >> its parent pdn when the device node is detached from the system.
>> >> Note the pdn is free'd when the device node is released if the
>> >> device node is dynamic one. Otherwise, the device node as well
>> >> as the pdn won't be released.
>> >> 
>> >> Fixes: cca87d30 ("powerpc/pci: Refactor pci_dn")
>> >
>> >That went into 4.1, so this should presumably go to stable?
>> 
>> Yeah, This should be put into 4.1 stable.
>
>OK thanks.
>
>I've added:
>
>  Cc: stable at vger.kernel.org # 4.1
>

Thanks, Michael :-)

>cheers
>
>