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ACPI: processor: idle: Reset power_setup_done flag on initialization failure

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The 'power_setup_done' flag is a key indicator used across the ACPI
processor driver to determine if cpuidle are properly configured and
available for a given CPU.

Currently, this flag is set during the early stages of initialization.
However, if the subsequent registration of the cpuidle driver in
acpi_processor_register_idle_driver() or the per-CPU device registration
in acpi_processor_power_init() fails, this flag remains set. This may
lead to some issues where other functions in ACPI idle driver use these
flags.

Fix this by explicitly resetting this flag to 0 in these error paths.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Link: https://patch.msgid.link/20260403085343.866440-1-lihuisong@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Huisong Li 2026-04-03 16:53:43 +08:00 committed by Rafael J. Wysocki
parent 00154eede7
commit 02c68ed11c
1 changed files with 11 additions and 0 deletions
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11
drivers/acpi/processor_idle.c
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@ -1379,6 +1379,7 @@ void acpi_processor_register_idle_driver(void)
ret = cpuidle_register_driver(&acpi_idle_driver);
if (ret) {
pr->flags.power_setup_done = 0;
pr_debug("register %s failed.\n", acpi_idle_driver.name);
return;
}
@ -1387,7 +1388,16 @@ void acpi_processor_register_idle_driver(void)
void acpi_processor_unregister_idle_driver(void)
{
struct acpi_processor *pr;
int cpu;
cpuidle_unregister_driver(&acpi_idle_driver);
for_each_possible_cpu(cpu) {
pr = per_cpu(processors, cpu);
if (!pr)
continue;
pr->flags.power_setup_done = 0;
}
}
void acpi_processor_power_init(struct acpi_processor *pr)
@ -1424,6 +1434,7 @@ void acpi_processor_power_init(struct acpi_processor *pr)
*/
if (cpuidle_register_device(dev)) {
per_cpu(acpi_cpuidle_device, pr->id) = NULL;
pr->flags.power_setup_done = 0;
kfree(dev);
}
}