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| author | Mario Limonciello <mario.limonciello@amd.com> | 2021-12-24 02:04:58 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-12-30 18:51:39 +0100 |
| commit | 2aeca6bd02776d7f56a49a32be0dd184f204d888 (patch) | |
| tree | 5e1ef5729753f98e1fd141a155a79150ecd35c3c /drivers/acpi | |
| parent | ACPI: CPPC: Implement support for SystemIO registers (diff) | |
| download | linux-2aeca6bd02776d7f56a49a32be0dd184f204d888.tar.xz linux-2aeca6bd02776d7f56a49a32be0dd184f204d888.zip | |
ACPI: CPPC: Check present CPUs for determining _CPC is valid
As this is a static check, it should be based upon what is currently
present on the system. This makes probeing more deterministic.
While local APIC flags field (lapic_flags) of cpu core in MADT table is
0, then the cpu core won't be enabled. In this case, _CPC won't be found
in this core, and return back to _CPC invalid with walking through
possible cpus (include disable cpus). This is not expected, so switch to
check present CPUs instead.
Reported-by: Jinzhou Su <Jinzhou.Su@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/cppc_acpi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 69e074647003..cc790037d643 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -413,7 +413,7 @@ bool acpi_cpc_valid(void) struct cpc_desc *cpc_ptr; int cpu; - for_each_possible_cpu(cpu) { + for_each_present_cpu(cpu) { cpc_ptr = per_cpu(cpc_desc_ptr, cpu); if (!cpc_ptr) return false; |