Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Message-ID: <cc0ea443d738f0e31c47cdc9661b824f27b0020b.camel@mengyan1223.wang>
Subject: Re: [PATCH 2/2] cpufreq: intel_pstate: Process HWP Guaranteed
 change notification
From:   Xi Ruoyao <xry111@mengyan1223.wang>
Reply-To: xry111@mengyan1223.wang
To:     Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        rui.zhang@intel.com, daniel.lezcano@linaro.org, rjw@rjwysocki.net,
        viresh.kumar@linaro.org, lenb@kernel.org
Cc:     linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
        xry111@mengyan1223.wang
Date:   Wed, 08 Sep 2021 13:45:08 +0800
In-Reply-To: <7fa77e2239dd87004319a799dbea39988b718233.camel@linux.intel.com>
References: <20210820024006.2347720-1-srinivas.pandruvada@linux.intel.com>
         <20210820024006.2347720-2-srinivas.pandruvada@linux.intel.com>
         <00450b0a9efbfde513ea8b445d31657ce5ac2f37.camel@mengyan1223.wang>
         <7fa77e2239dd87004319a799dbea39988b718233.camel@linux.intel.com>
Content-Type: text/plain; charset="UTF-8"
User-Agent: Evolution 3.40.4 
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Precedence: bulk

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@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University