[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>

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 | \