Merge tag 'pm+acpi-4.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...

[firefly-linux-kernel-4.4.55.git] / drivers / base / power / opp / cpu.c

diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c
index 7654c5606307f7e3d71903385964e3af9a71caea..7b445e88a0d559f091918be5e841f6a1380a33da 100644 (file)
--- a/drivers/base/power/opp/cpu.c
+++ b/drivers/base/power/opp/cpu.c
@@ -10,6 +10,9 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
 #include <linux/err.h>
@@ -124,12 +127,12 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
        struct device *dev;
        int cpu, ret = 0;
 
-       rcu_read_lock();
+       mutex_lock(&dev_opp_list_lock);
 
        dev_opp = _find_device_opp(cpu_dev);
        if (IS_ERR(dev_opp)) {
                ret = -EINVAL;
-               goto out_rcu_read_unlock;
+               goto unlock;
        }
 
        for_each_cpu(cpu, cpumask) {
@@ -150,10 +153,10 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
                        continue;
                }
        }
-out_rcu_read_unlock:
-       rcu_read_unlock();
+unlock:
+       mutex_unlock(&dev_opp_list_lock);
 
-       return 0;
+       return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus);