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authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>2005-10-23 16:31:00 -0400
committerLen Brown <len.brown@intel.com>2005-12-01 01:30:35 -0500
commit05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 (patch)
treedec76975406874cf677d6391302f42a6da55ac38 /include/acpi/pdc_intel.h
parentd2149b542382bfc206cb28485108f6470c979566 (diff)
downloadlinux-05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8.tar.bz2
[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.h4
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 | \