Merge tag 'pm-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix two cpufreq issues, one in the core and one in the
intel_pstate driver:
- Fix CPU device node reference counting in the cpufreq core (Miquel
Sabaté Solà)
- Turn the spinlock used by the intel_pstate driver in hard IRQ
context into a raw one to prevent the driver from crashing when
PREEMPT_RT is enabled (Uwe Kleine-König)"
* tag 'pm-6.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: Avoid a bad reference count on CPU node
cpufreq: intel_pstate: Make hwp_notify_lock a raw spinlock
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index aaea9a3..b0018f3 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1845,7 +1845,7 @@
wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_STATUS, 0);
}
-static DEFINE_SPINLOCK(hwp_notify_lock);
+static DEFINE_RAW_SPINLOCK(hwp_notify_lock);
static cpumask_t hwp_intr_enable_mask;
#define HWP_GUARANTEED_PERF_CHANGE_STATUS BIT(0)
@@ -1868,7 +1868,7 @@
if (!(value & status_mask))
return;
- spin_lock_irqsave(&hwp_notify_lock, flags);
+ raw_spin_lock_irqsave(&hwp_notify_lock, flags);
if (!cpumask_test_cpu(this_cpu, &hwp_intr_enable_mask))
goto ack_intr;
@@ -1876,13 +1876,13 @@
schedule_delayed_work(&all_cpu_data[this_cpu]->hwp_notify_work,
msecs_to_jiffies(10));
- spin_unlock_irqrestore(&hwp_notify_lock, flags);
+ raw_spin_unlock_irqrestore(&hwp_notify_lock, flags);
return;
ack_intr:
wrmsrl_safe(MSR_HWP_STATUS, 0);
- spin_unlock_irqrestore(&hwp_notify_lock, flags);
+ raw_spin_unlock_irqrestore(&hwp_notify_lock, flags);
}
static void intel_pstate_disable_hwp_interrupt(struct cpudata *cpudata)
@@ -1895,9 +1895,9 @@
/* wrmsrl_on_cpu has to be outside spinlock as this can result in IPC */
wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00);
- spin_lock_irq(&hwp_notify_lock);
+ raw_spin_lock_irq(&hwp_notify_lock);
cancel_work = cpumask_test_and_clear_cpu(cpudata->cpu, &hwp_intr_enable_mask);
- spin_unlock_irq(&hwp_notify_lock);
+ raw_spin_unlock_irq(&hwp_notify_lock);
if (cancel_work)
cancel_delayed_work_sync(&cpudata->hwp_notify_work);
@@ -1912,10 +1912,10 @@
if (boot_cpu_has(X86_FEATURE_HWP_NOTIFY)) {
u64 interrupt_mask = HWP_GUARANTEED_PERF_CHANGE_REQ;
- spin_lock_irq(&hwp_notify_lock);
+ raw_spin_lock_irq(&hwp_notify_lock);
INIT_DELAYED_WORK(&cpudata->hwp_notify_work, intel_pstate_notify_work);
cpumask_set_cpu(cpudata->cpu, &hwp_intr_enable_mask);
- spin_unlock_irq(&hwp_notify_lock);
+ raw_spin_unlock_irq(&hwp_notify_lock);
if (cpu_feature_enabled(X86_FEATURE_HWP_HIGHEST_PERF_CHANGE))
interrupt_mask |= HWP_HIGHEST_PERF_CHANGE_REQ;
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index e0e19d9..7fe0981 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -1107,10 +1107,9 @@
const char *cell_name,
struct of_phandle_args *args)
{
- struct device_node *cpu_np;
int ret;
- cpu_np = of_cpu_device_node_get(cpu);
+ struct device_node *cpu_np __free(device_node) = of_cpu_device_node_get(cpu);
if (!cpu_np)
return -ENODEV;
@@ -1118,9 +1117,6 @@
args);
if (ret < 0)
return ret;
-
- of_node_put(cpu_np);
-
return 0;
}
