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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2005-10-23 16:31:00 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-12-01 01:30:35 -0500 |
| commit | 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 (patch) | |
| tree | dec76975406874cf677d6391302f42a6da55ac38 /include/acpi/pdc_intel.h | |
| parent | d2149b542382bfc206cb28485108f6470c979566 (diff) | |
| download | blackbird-op-linux-05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8.tar.gz blackbird-op-linux-05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8.zip | |
[ACPI] Avoid BIOS inflicted crashes by evaluating _PDC only once
Linux invokes the AML _PDC method (Processor Driver Capabilities)
to tell the BIOS what features it can handle. While the ACPI
spec says nothing about the OS invoking _PDC multiple times,
doing so with changing bits seems to hopelessly confuse the BIOS
on multiple platforms up to and including crashing the system.
Factor out the _PDC invocation so Linux invokes it only once.
http://bugzilla.kernel.org/show_bug.cgi?id=5483
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi/pdc_intel.h')
| -rw-r--r-- | include/acpi/pdc_intel.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/include/acpi/pdc_intel.h b/include/acpi/pdc_intel.h index 91f4a12a99a1..3fa81d55cd0c 100644 --- a/include/acpi/pdc_intel.h +++ b/include/acpi/pdc_intel.h @@ -15,9 +15,7 @@ #define ACPI_PDC_C_C1_FFH (0x0100) #define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \ - ACPI_PDC_C_C1_HALT) - -#define ACPI_PDC_EST_CAPABILITY_SMP_MSR (ACPI_PDC_EST_CAPABILITY_SMP | \ + ACPI_PDC_C_C1_HALT | \ ACPI_PDC_P_FFH) #define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \ |
