From: Chen Liang <cl@rock-chips.com>
Date: Thu, 24 Nov 2016 08:17:51 +0000 (+0800)
Subject: cpufreq: cpufreq_interactive: avoid NULL point access
X-Git-Tag: firefly_0821_release~1220
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=fd7cc6839d91cbb068b8912fb2f7e27d717e79c3;hp=d6a5afc432bee13c844dd4b5752b5ab43c8e494c;ds=sidebyside

cpufreq: cpufreq_interactive: avoid NULL point access

Change-Id: Id21a45eff24575ade7786a88d076ddd50cba6520
Signed-off-by: Chen Liang <cl@rock-chips.com>
---

diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index d9927f92ea8b..055e990a2f1d 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -1171,6 +1171,9 @@ static void cpufreq_interactive_input_event(struct input_handle *handle,
 	now = ktime_to_us(ktime_get());
 	for_each_online_cpu(i) {
 		pcpu = &per_cpu(cpuinfo, i);
+		if (!pcpu->policy)
+			continue;
+
 		if (have_governor_per_policy())
 			tunables = pcpu->policy->governor_data;
 		else