ACPI: acpi_pad: Fix memory leak in power saving threads

Fix once per second (round_robin_time) memory leak of about 1 KB in
each acpi_pad kernel idling thread that is activated.

Found by testing with kmemleak.

Signed-off-by: Lenny Szubowicz <lszubowi@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 754431031282..552c1f725b6c 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -110,6 +110,7 @@ static void round_robin_cpu(unsigned int tsk_index)
                 cpumask_andnot(tmp, cpu_online_mask, pad_busy_cpus);
         if (cpumask_empty(tmp)) {
                 mutex_unlock(&round_robin_lock);
+                free_cpumask_var(tmp);
                 return;
         }
         for_each_cpu(cpu, tmp) {
@@ -127,6 +128,8 @@ static void round_robin_cpu(unsigned int tsk_index)
         mutex_unlock(&round_robin_lock);
 
         set_cpus_allowed_ptr(current, cpumask_of(preferred_cpu));
+
+        free_cpumask_var(tmp);
 }
 
 static void exit_round_robin(unsigned int tsk_index)