[Xen-devel] [PATCH] acpiphp: assume device is in state D0 after powering on a slot.

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Devices which do not support PCI configuration space based power
management may not otherwise be enabled.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 drivers/pci/hotplug/acpiphp_glue.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/hotplug/acpiphp_glue.c 
b/drivers/pci/hotplug/acpiphp_glue.c
index 2f67e9b..a70fa89 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -827,6 +827,13 @@ static int __ref enable_device(struct acpiphp_slot *slot)
        acpiphp_set_hpp_values(bus);
        acpiphp_set_acpi_region(slot);
        pci_enable_bridges(bus);
+
+       list_for_each_entry(dev, &bus->devices, bus_list) {
+               /* Assume that newly added devices are powered on already. */
+               if (!dev->is_added)
+                       dev->current_state = PCI_D0;
+       }
+
        pci_bus_add_devices(bus);
 
        list_for_each_entry(func, &slot->funcs, sibling) {
-- 
1.7.2.5


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