diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-26 08:10:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-26 08:10:00 -0700 |
| commit | dbbe4649d683577de1063dbd9f6da7d4b8de2fed (patch) | |
| tree | 039ff36f35190cbbf235afdaf90d66d4e78fbd07 /arch/x86/kernel/acpi/cstate.c | |
| parent | 24b1442d01ae155ea716dfb94ed21605541c317d (diff) | |
| parent | 0e1cf38889110a7188999388614aef17a84d9d25 (diff) | |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI / Sleep: Allow the NVS saving to be skipped during suspend to RAM
ACPI: create "processor.bm_check_disable" boot param
ACPI: skip checking BM_STS if the BIOS doesn't ask for it
ACPI: fix unused function warning
ACPI: processor: fix processor_physically_present on UP
ACPI video: fix string mismatch for Sony SR290 laptop
ACPI battery: don't invoke power_supply_changed twice when battery is hot-added
ACPI: handle systems which asynchoronously enable ACPI mode
Diffstat (limited to 'arch/x86/kernel/acpi/cstate.c')
| -rw-r--r-- | arch/x86/kernel/acpi/cstate.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c index 2e837f5080fe..fb7a5f052e2b 100644 --- a/arch/x86/kernel/acpi/cstate.c +++ b/arch/x86/kernel/acpi/cstate.c @@ -145,6 +145,15 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu, percpu_entry->states[cx->index].eax = cx->address; percpu_entry->states[cx->index].ecx = MWAIT_ECX_INTERRUPT_BREAK; } + + /* + * For _CST FFH on Intel, if GAS.access_size bit 1 is cleared, + * then we should skip checking BM_STS for this C-state. + * ref: "Intel Processor Vendor-Specific ACPI Interface Specification" + */ + if ((c->x86_vendor == X86_VENDOR_INTEL) && !(reg->access_size & 0x2)) + cx->bm_sts_skip = 1; + return retval; } EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_probe); |