Merge tag 'acpi-6.18-rc8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
"One more urgent ACPI support fix for 6.18

There is one more commit that needs to be reverted after reverting
problematic commit 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI
idle driver registration"), so revert it"

* tag 'acpi-6.18-rc8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPI: processor: Update cpuidle driver check in __acpi_processor_start()"

drivers/acpi/processor_driver.c

···
 	if (result && !IS_ENABLED(CONFIG_ACPI_CPU_FREQ_PSS))
 		dev_dbg(&device->dev, "CPPC data invalid or not present\n");
 
-	if (cpuidle_get_driver() == &acpi_idle_driver)
+	if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
 		acpi_processor_power_init(pr);
 
 	acpi_pss_perf_init(pr);