From 990a7ac5645883a833a11b900bb6f25b65dea65b Mon Sep 17 00:00:00 2001 From: Andrew Patterson <andrew.patterson@hp.com> Date: Mon, 10 Nov 2008 15:30:45 -0700 Subject: 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> --- drivers/acpi/pci_root.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 642554b..de4d571 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 * ------- -- cgit v1.1