Merge tag 'pm-6.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Prevent cpufreq_update_limits() from crashing the kernel due to a NULL
  pointer dereference when it is called before registering a cpufreq
  driver, for instance as a result of a notification triggered by the
  platform firmware (Rafael Wysocki)"

* tag 'pm-6.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: Reference count policy in cpufreq_update_limits()

Author: torvalds

drivers/cpufreq/cpufreq.c

@@ -2809,6 +2809,12 @@ EXPORT_SYMBOL(cpufreq_update_policy);
  */
 void cpufreq_update_limits(unsigned int cpu)
 {
+	struct cpufreq_policy *policy __free(put_cpufreq_policy);
+
+	policy = cpufreq_cpu_get(cpu);
+	if (!policy)
+		return;
+
 	if (cpufreq_driver->update_limits)
 		cpufreq_driver->update_limits(cpu);
 	else