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| author | Zhang Rui <rui.zhang@intel.com> | 2009-05-11 09:36:01 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-05-15 23:21:54 -0400 |
| commit | 4973b22aa8c70fe036e3e0039f104cf5bb7fe2b1 (patch) | |
| tree | 7c3540560f5256dbcc76d7f8582bab0815ec3451 /drivers/acpi | |
| parent | 56c213fa012f2bad9eff908292ff2500f840b020 (diff) | |
| download | linux-4973b22aa8c70fe036e3e0039f104cf5bb7fe2b1.tar.gz linux-4973b22aa8c70fe036e3e0039f104cf5bb7fe2b1.tar.bz2 linux-4973b22aa8c70fe036e3e0039f104cf5bb7fe2b1.zip | |
ACPI processor: reset the throttling state once it's invalid
If the BIOS hands us an invalid throttling state,
write a valid state.
http://bugzilla.kernel.org/show_bug.cgi?id=13259
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: James Ettle <theholyettlz@googlemail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/processor_throttling.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c index 5f09fb8c0e05..7f16f5f8e7d3 100644 --- a/drivers/acpi/processor_throttling.c +++ b/drivers/acpi/processor_throttling.c @@ -838,6 +838,14 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr) ret = acpi_read_throttling_status(pr, &value); if (ret >= 0) { state = acpi_get_throttling_state(pr, value); + if (state == -1) { + ACPI_WARNING((AE_INFO, + "Invalid throttling state, reset\n")); + state = 0; + ret = acpi_processor_set_throttling(pr, state); + if (ret) + return ret; + } pr->throttling.state = state; } |