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cpufreq/amd-pstate: Call cppc_set_auto_sel() only for online CPUs 

amd_pstate_change_mode_without_dvr_change() calls cppc_set_auto_sel()
for all the present CPUs.

However, this callpath eventually calls cppc_set_reg_val() which
accesses the per-cpu cpc_desc_ptr object. This object is initialized
only for online CPUs via acpi_soft_cpu_online() -->
__acpi_processor_start() --> acpi_cppc_processor_probe().

Hence, restrict calling cppc_set_auto_sel() to only the online CPUs.

Fixes: 3ca7bc818d ("cpufreq: amd-pstate: Add guided mode control support via sysfs")
Suggested-by: Mario Limonciello (AMD) (kernel.org) <superm1@kernel.org>
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
This commit is contained in:
Gautham R. Shenoy 2025-11-07 13:11:45 +05:30 committed by Mario Limonciello (AMD)
parent 077f23573d
commit bb31fef0d0
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/amd-pstate.c
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@ -1278,7 +1278,7 @@ static int amd_pstate_change_mode_without_dvr_change(int mode)
if (cpu_feature_enabled(X86_FEATURE_CPPC) || cppc_state == AMD_PSTATE_ACTIVE)
return 0;
for_each_present_cpu(cpu) {
for_each_online_cpu(cpu) {
cppc_set_auto_sel(cpu, (cppc_state == AMD_PSTATE_PASSIVE) ? 0 : 1);
}