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SubjectRe: [PATCH v8 02/22] PCI: Add root bus children dev's res to fail list
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On Tue, Jan 15, 2013 at 1:52 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> On Tuesday, January 15, 2013 07:44:21 AM Yinghai Lu wrote:
>> On Tue, Jan 15, 2013 at 3:21 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
>> > On Monday, January 14, 2013 10:23:47 PM Yinghai Lu wrote:
>> >> On Sat, Jan 12, 2013 at 1:37 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
>> >> > On Friday, January 11, 2013 02:40:29 PM Yinghai Lu wrote:
>> >> >> We can stop trying according to try number now and do not need to use
>> >> >> root_bus checking as stop sign anymore.
>> >> >>
>> >> >> In extreme case we could need to reallocate resource for device just
>> >> >> under root bus.
>> >> >
>> >> > Well, the above says that we _can_ do the change, but it doesn't explain why it
>> >> > is needed. So what's the reason why we need to do that?
>> >>
>> >> In extreme case we could need to reallocate resource for device just
>> >> under root bus.
>> >>
>> >> otherwise, those devices just under root bus will not be assigned
>> >> resources again.
>> >
>> > IOW, our current code will not cover the case when we hot plug a host bridge
>> > and need to reassign resources for devices integrated into it?
>>
>> yes. in extreme case if _CRS range is not big enough.
>
> It would be good to say that in the changelog too. It's a clear justification
> for the change if we're going to support root bridge hotplug (which we are).
>

ok.


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