diff options
| author | Shaohua Li <shaohua.li@intel.com> | 2007-04-25 11:05:12 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-04-25 01:13:47 -0400 |
| commit | f8993aff8b4de0317c6e081802ca5c86c449fef2 (patch) | |
| tree | aa0bd506c8887a4be0fafd6d005b515a899f708f | |
| parent | a23cf14b161b8deeb0f701d577a0e8be6365e247 (diff) | |
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>
| -rw-r--r-- | drivers/pci/pci-acpi.c | 4 | ||||
| -rw-r--r-- | include/acpi/actbl.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index a064f36a080..b5ac810404c 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -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; diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h index 09469e7db6a..955adfb8d64 100644 --- a/include/acpi/actbl.h +++ b/include/acpi/actbl.h @@ -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 |