From 8b29d29abc484d638213dd79a18a95ae7e5bb402 Mon Sep 17 00:00:00 2001
From: Lenny Szubowicz <lszubowi@redhat.com>
Date: Tue, 27 Mar 2018 09:56:40 -0400
Subject: [PATCH] ACPI: acpi_pad: Fix memory leak in power saving threads
Git-commit: 8b29d29abc484d638213dd79a18a95ae7e5bb402
Patch-mainline: v4.17-rc1
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/acpi/acpi_pad.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -110,6 +110,7 @@ static void round_robin_cpu(unsigned int
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
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)