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ACPI processor: reset the throttling state once it's invalid

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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>
This commit is contained in:
Zhang Rui 2009-05-11 09:36:01 +08:00 committed by Len Brown
parent 56c213fa01
commit 4973b22aa8
1 changed files with 8 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/acpi/processor_throttling.c
View file

@ -838,6 +838,14 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
ret = acpi_read_throttling_status(pr, &value); ret = acpi_read_throttling_status(pr, &value);
if (ret >= 0) { if (ret >= 0) {
state = acpi_get_throttling_state(pr, value); 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; pr->throttling.state = state;
} }