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authorAndrew Patterson <andrew.patterson@hp.com>2008-11-10 15:30:45 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-01-07 11:12:27 -0800
commit990a7ac5645883a833a11b900bb6f25b65dea65b (patch)
tree8644b7da9b41069d873d2b4dbe600bc5a828347d /drivers/acpi
parent8b62091e20215730be1b94b7cd135a78a3e692ca (diff)
ACPI/PCI: call _OSC support during root bridge discovery
Add pci_acpi_osc_support() and call it when a PCI bridge is added. This allows us to avoid having every individual PCI root bridge driver call _OSC support for every root bridge in their probe functions, a significant savings in boot time. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/pci_root.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 642554b1b60..de4d57114fe 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -31,6 +31,7 @@
#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/pci.h>
+#include <linux/pci-acpi.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
@@ -193,6 +194,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
unsigned long long value = 0;
acpi_handle handle = NULL;
struct acpi_device *child;
+ u32 flags;
if (!device)
@@ -210,6 +212,13 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
device->ops.bind = acpi_pci_bind;
+ /*
+ * All supported architectures that use ACPI have support for
+ * PCI domains, so we indicate this in _OSC support capabilities.
+ */
+ flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
+ pci_acpi_osc_support(device->handle, flags);
+
/*
* Segment
* -------