From: Hoan Tran Date: Wed, 14 Sep 2016 23:08:28 +0000 (-0700) Subject: cpufreq: CPPC: Avoid overflow when calculating desired_perf X-Git-Tag: v4.14-rc1~2170^2~14 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f89f4147f76f91bfff6f32890fc34148178f144d;p=platform%2Fkernel%2Flinux-rpi.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 Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 6debc18..99db422 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;