diff mbox series

[v1,2/3] cpufreq: Split cpufreq_offline()

Message ID 2258373.ElGaqSPkdT@kreacher
State New
Headers show
Series cpufreq: Locking-related changes in cpufreq_offline() and cpufreq_remove_dev() | expand

Commit Message

Rafael J. Wysocki May 11, 2022, 3:50 p.m. UTC 
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Split the "core" part running under the policy rwsem out of
cpufreq_offline() to allow the locking in cpufreq_remove_dev() to be
rearranged more easily.

As a side-effect this eliminates the unlock label that's not needed
any more.

No expected functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpufreq/cpufreq.c |   33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)
diff mbox series

Patch

Index: linux-pm/drivers/cpufreq/cpufreq.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/cpufreq.c
+++ linux-pm/drivers/cpufreq/cpufreq.c
@@ -1576,21 +1576,10 @@  static int cpufreq_add_dev(struct device
 	return 0;
 }
 
-static int cpufreq_offline(unsigned int cpu)
+static void __cpufreq_offline(unsigned int cpu, struct cpufreq_policy *policy)
 {
-	struct cpufreq_policy *policy;
 	int ret;
 
-	pr_debug("%s: unregistering CPU %u\n", __func__, cpu);
-
-	policy = cpufreq_cpu_get_raw(cpu);
-	if (!policy) {
-		pr_debug("%s: No cpu_data found\n", __func__);
-		return 0;
-	}
-
-	down_write(&policy->rwsem);
-
 	if (has_target())
 		cpufreq_stop_governor(policy);
 
@@ -1608,7 +1597,7 @@  static int cpufreq_offline(unsigned int
 				pr_err("%s: Failed to start governor\n", __func__);
 		}
 
-		goto unlock;
+		return;
 	}
 
 	if (has_target())
@@ -1635,8 +1624,24 @@  static int cpufreq_offline(unsigned int
 		cpufreq_driver->exit(policy);
 		policy->freq_table = NULL;
 	}
+}
+
+static int cpufreq_offline(unsigned int cpu)
+{
+	struct cpufreq_policy *policy;
+
+	pr_debug("%s: unregistering CPU %u\n", __func__, cpu);
+
+	policy = cpufreq_cpu_get_raw(cpu);
+	if (!policy) {
+		pr_debug("%s: No cpu_data found\n", __func__);
+		return 0;
+	}
+
+	down_write(&policy->rwsem);
+
+	__cpufreq_offline(cpu, policy);
 
-unlock:
 	up_write(&policy->rwsem);
 	return 0;
 }