linux-kernel - [PATCH] cpufreq: intel_pstate: Fix cpuinfo_cur

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Message-ID: <1500875013-123321-1-git-send-email-yehs1@lenovo.com>
Date:   Mon, 24 Jul 2017 05:43:14 +0000
From:   Huaisheng HS1 Ye <yehs1@...ovo.com>
To:     "srinivas.pandruvada@...ux.intel.com" 
        <srinivas.pandruvada@...ux.intel.com>
CC:     "lenb@...nel.org" <lenb@...nel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Huaisheng HS1 Ye" <yehs1@...ovo.com>
Subject: [PATCH] cpufreq: intel_pstate: Fix cpuinfo_cur_freq after performance
 governor changes

After commit 82b4e03e01bc (intel_pstate: skip scheduler hook when
in "performance" mode) Software P-state control modes couldn't get
dynamic value during performance mode, and it still in last value from
powersave mode, so clear its value to get same behavior as Hardware
P-state to avoid confusion.

Signed-off-by: Huaisheng Ye <yehs1@...ovo.com>
---
 drivers/cpufreq/intel_pstate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 6cd5035..c675626 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2050,6 +2050,7 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
 		 */
 		intel_pstate_clear_update_util_hook(policy->cpu);
 		intel_pstate_max_within_limits(cpu);
+		cpu->sample.core_avg_perf = 0;
 	} else {
 		intel_pstate_set_update_util_hook(policy->cpu);
 	}
-- 
1.8.3.1