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PCI ACPI: Added a function to register _OSC with only PCIe devices.

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The function pci_osc_support_set() traverses every root bridge when
checking for _OSC support for a capability.  It quits as soon as it finds a
device/bridge that doesn't support the requested capability. This won't
work for systems that have mixed PCI and PCIe bridges when checking for
PCIe features.  I split this function into two -- pci_osc_support_set() and
pcie_osc_support_set(). The latter is used when only PCIe devices should be
traversed.

Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andrew Patterson 2008-01-22 17:18:12 -07:00 committed by Greg Kroah-Hartman
parent 02d90fc343
commit c277835723
2 changed files with 13 additions and 4 deletions
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6
drivers/pci/pci-acpi.c
View file

@ -156,13 +156,13 @@ run_osc_out:
}
/**
* pci_osc_support_set - register OS support to Firmware
* __pci_osc_support_set - register OS support to Firmware
* @flags: OS support bits
*
* Update OS support fields and doing a _OSC Query to obtain an update
* from Firmware on supported control bits.
**/
acpi_status pci_osc_support_set(u32 flags)
acpi_status __pci_osc_support_set(u32 flags, const char *hid)
{
u32 temp;
acpi_status retval;
@ -176,7 +176,7 @@ acpi_status pci_osc_support_set(u32 flags)
temp = ctrlset_buf[OSC_CONTROL_TYPE];
ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
acpi_get_devices ( PCI_ROOT_HID_STRING,
acpi_get_devices(hid,
acpi_query_osc,
ctrlset_buf,
(void **) &retval );

11
include/linux/pci-acpi.h
View file

@ -48,7 +48,15 @@
#ifdef CONFIG_ACPI
extern acpi_status pci_osc_control_set(acpi_handle handle, u32 flags);
extern acpi_status pci_osc_support_set(u32 flags);
extern acpi_status __pci_osc_support_set(u32 flags, const char *hid);
static inline acpi_status pci_osc_support_set(u32 flags)
{
return __pci_osc_support_set(flags, PCI_ROOT_HID_STRING);
}
static inline acpi_status pcie_osc_support_set(u32 flags)
{
return __pci_osc_support_set(flags, PCI_EXPRESS_ROOT_HID_STRING);
}
#else
#if !defined(AE_ERROR)
typedef u32 acpi_status;
@ -57,6 +65,7 @@ typedef u32 acpi_status;
static inline acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{return AE_ERROR;}
static inline acpi_status pci_osc_support_set(u32 flags) {return AE_ERROR;}
static inline acpi_status pcie_osc_support_set(u32 flags) {return AE_ERROR;}
#endif
#endif /* _PCI_ACPI_H_ */