[PATCH 4/4] drivers/pci/hotplug: Support surprise hotplug
Gavin Shan
gwshan at linux.vnet.ibm.com
Wed Sep 21 22:20:48 AEST 2016
On Wed, Sep 21, 2016 at 02:08:18PM +1000, Michael Ellerman wrote:
>Gavin Shan <gwshan at linux.vnet.ibm.com> writes:
>
>> This supports PCI surprise hotplug. The design is highlighted as
>> below:
>>
>> * The PCI slot's surprise hotplug capability is exposed through
>> device node property "ibm,slot-surprise-pluggable", meaning
>> PCI surprise hotplug will be disabled if skiboot doesn't support
>> it yet.
>> * The interrupt because of presence or link state change is raised
>> on surprise hotplug event. One event is allocated and queued to
>> the PCI slot for workqueue to pick it up and process in serialized
>> fashion. The code flow for surprise hotplug is same to that for
>> managed hotplug except: the affected PEs are put into frozen state
>> to avoid unexpected EEH error reporting in surprise hot remove path.
>>
>> Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>
>> ---
>> arch/powerpc/include/asm/pnv-pci.h | 9 ++
>> drivers/pci/hotplug/pnv_php.c | 219 +++++++++++++++++++++++++++++++++++++
>
>Can you please resend this and Cc linux-pci and Bjorn, thanks.
>
Thanks for the tips that I should have followed last time when posting the patches.
This series was resent and Bjorn/linux-pci are copied. Please ignore this copy.
Thanks,
Gavin
>cheers
>
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