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ACPI: CPPC: Check present CPUs for determining _CPC is valid
[ Upstream commit 2aeca6bd02
]
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>
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1 changed files with 1 additions and 1 deletions
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@ -411,7 +411,7 @@ bool acpi_cpc_valid(void)
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struct cpc_desc *cpc_ptr;
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int cpu;
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for_each_possible_cpu(cpu) {
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for_each_present_cpu(cpu) {
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cpc_ptr = per_cpu(cpc_desc_ptr, cpu);
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if (!cpc_ptr)
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return false;
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