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ACPI: Disable MSI on request of FADT 

The ACPI spec defines the bit and Microsoft uses it,
so Linux must use it too.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Shaohua Li 2007-04-25 11:05:12 +08:00 committed by Len Brown
parent a23cf14b16
commit f8993aff8b
2 changed files with 5 additions and 0 deletions
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4
drivers/pci/pci-acpi.c
View File

@ -317,6 +317,10 @@ static int __init acpi_pci_init(void)
{
int ret;
if (acpi_gbl_FADT.boot_flags & BAF_MSI_NOT_SUPPORTED) {
printk(KERN_INFO"ACPI FADT declares the system doesn't support MSI, so disable it\n");
pci_no_msi();
}
ret = register_acpi_bus_type(&acpi_pci_bus);
if (ret)
return 0;

1
include/acpi/actbl.h
View File

@ -276,6 +276,7 @@ enum acpi_prefered_pm_profiles {
#define BAF_LEGACY_DEVICES 0x0001
#define BAF_8042_KEYBOARD_CONTROLLER 0x0002
#define BAF_MSI_NOT_SUPPORTED 0x0008
#define FADT2_REVISION_ID 3
#define FADT2_MINUS_REVISION_ID 2