On Wed, May 10, 2017 at 04:35:06PM +0000, Wei Zhang wrote: > Hi Keith, > > I see. I thought the current CPU root complex does not support such a use case, ie removing the DPC switch device itself and might result in kernel panic. But I agree this will make the code future-proof when CPU does support such a case in the future. What do you mean in the future? I do this today (hotplug enclosures), but I need this fix in place otherwise we get a use-after-free when the DPC work queue runs after the hotplug code freed the topology that includes the DPC parts.
