Messages in this thread Patch in this message | | | From | Hoan Tran <> | Subject | [PATCH] cpufreq: CPPC: Avoid overflow when calculating desired_perf | Date | Wed, 14 Sep 2016 16:08:28 -0700 |
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This patch fixes overflow issue when calculating the desired_perf.
Signed-off-by: Hoan Tran <hotran@apm.com> --- drivers/cpufreq/cppc_cpufreq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 894e465..3e0961e 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -84,7 +84,8 @@ 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; -- 1.9.1
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