From: Hoan Tran <hotran@apm.com>
Date: Wed, 14 Sep 2016 23:08:28 +0000 (-0700)
Subject: cpufreq: CPPC: Avoid overflow when calculating desired_perf
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f89f4147f76f91bfff6f32890fc34148178f144d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

cpufreq: CPPC: Avoid overflow when calculating desired_perf

This patch fixes overflow issue when calculating the desired_perf.

Fixes: ad38677df44b (cpufreq: CPPC: Force reporting values in KHz to fix user space interface)
Signed-off-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 6debc189a9c9..99db4227ae38 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -84,7 +84,7 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy,
 
 	cpu = all_cpu_data[policy->cpu];
 
-	cpu->perf_ctrls.desired_perf = target_freq * policy->max / cppc_dmi_max_khz;
+	cpu->perf_ctrls.desired_perf = (u64)target_freq * policy->max / cppc_dmi_max_khz;
 	freqs.old = policy->cur;
 	freqs.new = target_freq;