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

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Date:	Wed, 11 May 2011 17:00:32 +0100
From:	Ian Campbell <ian.campbell@...rix.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xensource.com,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Ian Campbell <ian.campbell@...rix.com>
Subject: [PATCH] acpiphp: assume device is in state D0 after powering on a slot.

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

Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
---
 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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