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pcie: clean up hot plug notification
Simplify logic for hotplug notification, by tracking state of thelogical interrupt condition. We then simply use this variable to makethe interrupt decision, according to spec.
API is made cleaner as we no longer force users to pass in...
x3130: pcie downstream port
Implement TI x3130 pcie downstream port switch.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>Signed-off-by: Michael S. Tsirkin <mst@redhat.com>