linux-kernel - [PATCH v4 08/12] cpufreq: qcom: Disable fast switch when scaling ddr/l3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200504202243.5476-9-sibis@codeaurora.org>
Date:   Tue,  5 May 2020 01:52:39 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     viresh.kumar@...aro.org, sboyd@...nel.org,
        georgi.djakov@...aro.org, bjorn.andersson@...aro.org,
        saravanak@...gle.com, mka@...omium.org
Cc:     nm@...com, agross@...nel.org, david.brown@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, rjw@...ysocki.net,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        dianders@...omium.org, vincent.guittot@...aro.org,
        amit.kucheria@...aro.org, ulf.hansson@...aro.org,
        lukasz.luba@....com, sudeep.holla@....com,
        Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v4 08/12] cpufreq: qcom: Disable fast switch when scaling ddr/l3

Disable fast switch when the icc paths required for scaling ddr/l3
are populated.

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/cpufreq/qcom-cpufreq-hw.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 4fb489b69bc61..4b2c23dab3728 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -316,7 +316,9 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 
 	dev_pm_opp_of_register_em(policy->cpus);
 
-	policy->fast_switch_possible = true;
+	ret = dev_pm_opp_get_path_count(cpu_dev);
+	if (ret <= 0)
+		policy->fast_switch_possible = true;
 
 	return 0;
 error:
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project