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mvebu: add fix for armada 37xx cpufreq driver

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Backport from stable kernel tree fixing clock leak.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
This commit is contained in:
Tomasz Maciej Nowak 2018-06-09 16:13:40 +02:00 committed by John Crispin
parent 9a26a9e8b9
commit 4ec8c8c23e
1 changed files with 35 additions and 0 deletions
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35
target/linux/mvebu/patches-4.14/508-cpufreq-armada-37xx-Fix-clock-leak.patch Normal file
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@ -0,0 +1,35 @@
From bbcc328561040292f7d6796954d478e4a2335e6f Mon Sep 17 00:00:00 2001
From: Gregory CLEMENT <gregory.clement@bootlin.com>
Date: Wed, 4 Apr 2018 16:44:44 +0200
Subject: [PATCH] cpufreq: armada-37xx: Fix clock leak
There was no clk_put() balancing the clk_get(). This commit fixes it.
Fixes: 92ce45fb875d (cpufreq: Add DVFS support for Armada 37xx)
Cc: 4.16+ <stable@vger.kernel.org> # 4.16+
Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/cpufreq/armada-37xx-cpufreq.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/cpufreq/armada-37xx-cpufreq.c
+++ b/drivers/cpufreq/armada-37xx-cpufreq.c
@@ -202,6 +202,7 @@ static int __init armada37xx_cpufreq_dri
cur_frequency = clk_get_rate(clk);
if (!cur_frequency) {
dev_err(cpu_dev, "Failed to get clock rate for CPU\n");
+ clk_put(clk);
return -EINVAL;
}
@@ -210,6 +211,7 @@ static int __init armada37xx_cpufreq_dri
return -EINVAL;
armada37xx_cpufreq_dvfs_setup(nb_pm_base, clk, dvfs->divider);
+ clk_put(clk);
for (load_lvl = ARMADA_37XX_DVFS_LOAD_0; load_lvl < LOAD_LEVEL_NR;
load_lvl++) {