From: Mario Limonciello mario.limonciello@amd.com
[ Upstream commit 2aeca6bd02776d7f56a49a32be0dd184f204d888 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/cppc_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index b62c87b8ce4a9..12a156d8283e6 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -411,7 +411,7 @@ 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;