[PATCH v4 01/10] drivers base/arch_topology: free cpumask cpus_to_visit

[Dietmar Eggemann]

Free cpumask cpus_to_visit in case registering
init_cpu_capacity_notifier has failed or the parsing of the cpu
capacity-dmips-mhz property is done. The cpumask cpus_to_visit is
only used inside the notifier call init_cpu_capacity_callback.

Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Juri Lelli <juri.le...@arm.com>
Reported-by: Vincent Guittot <vincent.guit...@linaro.org>
Signed-off-by: Dietmar Eggemann <dietmar.eggem...@arm.com>
Acked-by: Vincent Guittot <vincent.guit...@linaro.org>
Acked-by: Viresh Kumar <viresh.ku...@linaro.org>
Tested-by: Juri Lelli <juri.le...@arm.com>
Reviewed-by: Juri Lelli <juri.le...@arm.com>
---
 drivers/base/arch_topology.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index d1c33a85059e..562e0c93ae52 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -206,6 +206,8 @@ static struct notifier_block init_cpu_capacity_notifier = {
 
 static int __init register_cpufreq_notifier(void)
 {
+       int ret;
+
        /*
         * on ACPI-based systems we need to use the default cpu capacity
         * until we have the necessary code to parse the cpu capacity, so
@@ -221,8 +223,13 @@ static int __init register_cpufreq_notifier(void)
 
        cpumask_copy(cpus_to_visit, cpu_possible_mask);
 
-       return cpufreq_register_notifier(&init_cpu_capacity_notifier,
-                                        CPUFREQ_POLICY_NOTIFIER);
+       ret = cpufreq_register_notifier(&init_cpu_capacity_notifier,
+                                       CPUFREQ_POLICY_NOTIFIER);
+
+       if (ret)
+               free_cpumask_var(cpus_to_visit);
+
+       return ret;
 }
 core_initcall(register_cpufreq_notifier);
 
@@ -230,6 +237,7 @@ static void parsing_done_workfn(struct work_struct *work)
 {
        cpufreq_unregister_notifier(&init_cpu_capacity_notifier,
                                         CPUFREQ_POLICY_NOTIFIER);
+       free_cpumask_var(cpus_to_visit);
 }
 
 #else
-- 
2.11.0