diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-01-29 11:33:37 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-01-29 11:33:37 +1100 |
| commit | dfd0436ad0ce139467b124c646fa65ee2635e14a (patch) | |
| tree | abf9d83c704417cdd484243c12aeffee6b185aba /drivers/acpi/processor_perflib.c | |
| parent | b9818c3312da66f4b83a4a2e8650628be1237cb5 (diff) | |
| parent | 689dfa894c57842a05bf6dc9f97e6bb71ec5f386 (diff) | |
| download | linux-dfd0436ad0ce139467b124c646fa65ee2635e14a.tar.bz2 | |
Merge branch 'merge' into next
Merge "merge" branch to bring in various bug fixes that are
going into 3.8
Diffstat (limited to 'drivers/acpi/processor_perflib.c')
| -rw-r--r-- | drivers/acpi/processor_perflib.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index 836bfe069042..53e7ac9403a7 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -340,6 +340,13 @@ static void amd_fixup_frequency(struct acpi_processor_px *px, int i) if ((boot_cpu_data.x86 == 0x10 && boot_cpu_data.x86_model < 10) || boot_cpu_data.x86 == 0x11) { rdmsr(MSR_AMD_PSTATE_DEF_BASE + index, lo, hi); + /* + * MSR C001_0064+: + * Bit 63: PstateEn. Read-write. If set, the P-state is valid. + */ + if (!(hi & BIT(31))) + return; + fid = lo & 0x3f; did = (lo >> 6) & 7; if (boot_cpu_data.x86 == 0x10) |