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commit882d18a702upstream. After relatively recent changes in the ACPI-based PCI hotplug (ACPIPHP) code, the acpiphp_check_host_bridge() executed for PCI host bridges via acpi_pci_root_scan_dependent() doesn't do anything useful, because those bridges do not have hotplug contexts. That happens by mistake, so fix it by making acpiphp_enumerate_slots() add hotplug contexts to PCI host bridges too and modify acpiphp_remove_slots() to drop those contexts for host bridges as appropriate. Link: https://bugzilla.kernel.org/show_bug.cgi?id=76901 Fixes:2d8b1d566a(ACPI / hotplug / PCI: Get rid of check_sub_bridges()) Reported-and-tested-by: Gavin Guo <gavin.guo@canonical.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>