linux-kernel - [PATCH] cpufreq: conservative: Ensure requested

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-next>] [day] [month] [year] [list]

Message-ID: <20230912060957.2516790-1-liaochang1@huawei.com>
Date:   Tue, 12 Sep 2023 06:09:57 +0000
From:   Liao Chang <liaochang1@...wei.com>
To:     <rafael@...nel.org>, <viresh.kumar@...aro.org>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] cpufreq: conservative: Ensure requested_freq is greater than min frequency

The governor ensures that the requested frequency is greater than the
minimum frequency when the condition for decreasing frequency is
satisfied. This is done by either reducing the frequency step from the
current frequency if the current frequency is greater than the sum of
the frequency step and the minimum frequency, or setting the frequency
to the minimum one otherwise.

Signed-off-by: Liao Chang <liaochang1@...wei.com>
---
 drivers/cpufreq/cpufreq_conservative.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 56500b25d77c..54e09242b2e2 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -130,7 +130,7 @@ static unsigned int cs_dbs_update(struct cpufreq_policy *policy)
 		if (requested_freq == policy->min)
 			goto out;
 
-		if (requested_freq > freq_step)
+		if (requested_freq > policy->min + freq_step)
 			requested_freq -= freq_step;
 		else
 			requested_freq = policy->min;
-- 
2.34.1