diff options
| author | Zhang Rui <rui.zhang@intel.com> | 2020-04-22 15:26:07 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-04-27 10:32:44 +0200 |
| commit | 496121c02127e9c460b436244c38260b044cc45a (patch) | |
| tree | 62b16501bdc7191726e3d139f1b52219fb428839 /drivers/acpi | |
| parent | 6a8b55ed4056ea5559ebe4f6a4b247f627870d4c (diff) | |
| download | linux-496121c02127e9c460b436244c38260b044cc45a.tar.bz2 | |
ACPI: processor: idle: Allow probing on platforms with one ACPI C-state
It is possible for ACPI _CST to return only one ACPI C-state, for
example, when deep cstate disabled in the BIOS.
And it is better for the acpi_idle driver to probe succesfully in
this case as well for consistency.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index dcc289e30166..75534c5b5433 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -308,11 +308,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) if (ret) return ret; - /* - * It is expected that there will be at least 2 states, C1 and - * something else (C2 or C3), so fail if that is not the case. - */ - if (pr->power.count < 2) + if (!pr->power.count) return -EFAULT; pr->flags.has_cst = 1; @@ -468,8 +464,7 @@ static int acpi_processor_get_cstate_info(struct acpi_processor *pr) for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { if (pr->power.states[i].valid) { pr->power.count = i; - if (pr->power.states[i].type >= ACPI_STATE_C2) - pr->flags.power = 1; + pr->flags.power = 1; } } |