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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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