linux-kernel - Re: [PATCH 2/2] cpufreq: intel_pstate: Process HWP Guaranteed change notification

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Date:   Wed, 08 Sep 2021 13:45:08 +0800
From:   Xi Ruoyao <xry111@...gyan1223.wang>
To:     Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        rui.zhang@...el.com, daniel.lezcano@...aro.org, rjw@...ysocki.net,
        viresh.kumar@...aro.org, lenb@...nel.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        xry111@...gyan1223.wang
Subject: Re: [PATCH 2/2] cpufreq: intel_pstate: Process HWP Guaranteed
 change notification

On Tue, 2021-09-07 at 18:54 -0700, Srinivas Pandruvada wrote:
> Hi Wang,
> 
> I think this is Lenovo system. The FW sends some interrupts prematurely
> before driver is ready,

It's not Lenovo, but I think this kind of FW bugs exist in wild.

> There is a fix available but We have decided to revert the commit.
> 
> Please try the patch attached here.
> https://bugzilla.kernel.org/show_bug.cgi?id=214329

I can confirm it fixed the issue (at least on my machine :).

Thanks!

-- 
Xi Ruoyao <xry111@...gyan1223.wang>
School of Aerospace Science and Technology, Xidian University