Hi Rafael,

On Wed, Sep 14, 2016 at 5:50 PM, Rafael J. Wysocki [off-list ref] wrote:

On Wednesday, September 14, 2016 04:08:28 PM Hoan Tran wrote:

quoted

This patch fixes overflow issue when calculating the desired_perf.

Signed-off-by: Hoan Tran <redacted>
---
 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;

That's on top of the CPPC material in linux-next I gather?

Yes, it's on TOP of linux-next.

Which commit does it fix?

This is a fix for ad38677df44b67e0f5b6c4d31e9c2734abde8ed9 (cpufreq:
CPPC: Force reporting values in KHz to fix user space interface)
http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/cpufreq/cppc_cpufreq.c?id=ad38677df44b67e0f5b6c4d31e9c2734abde8ed9

Thanks
Hoan

Thanks,
Rafael