linux-kernel - [PATCH v2 1/2] cpufreq: Return -EOPNOTSUPP if no policy is boost supported

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Message-ID: <20251128091352.1969333-2-zhenglifeng1@huawei.com>
Date: Fri, 28 Nov 2025 17:13:51 +0800
From: Lifeng Zheng <zhenglifeng1@...wei.com>
To: <rafael@...nel.org>, <viresh.kumar@...aro.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <lihuisong@...wei.com>, <yubowen8@...wei.com>,
	<zhangpengjie2@...wei.com>, <wangzhi12@...wei.com>,
	<linhongye@...artners.com>, <zhenglifeng1@...wei.com>
Subject: [PATCH v2 1/2] cpufreq: Return -EOPNOTSUPP if no policy is boost supported

In cpufreq_boost_trigger_state(), if all the policies are boost
unsupported, policy_set_boost() will not be called and this function will
return 0. But it is better to return an error to indicate that the platform
doesn't support boost.

Signed-off-by: Lifeng Zheng <zhenglifeng1@...wei.com>
---
 drivers/cpufreq/cpufreq.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index e8d7544b77b8..a4399e5490da 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2806,7 +2806,7 @@ static int cpufreq_boost_trigger_state(int state)
 {
 	struct cpufreq_policy *policy;
 	unsigned long flags;
-	int ret = 0;
+	int ret = -EOPNOTSUPP;
 
 	/*
 	 * Don't compare 'cpufreq_driver->boost_enabled' with 'state' here to
@@ -2826,6 +2826,10 @@ static int cpufreq_boost_trigger_state(int state)
 		if (ret)
 			goto err_reset_state;
 	}
+
+	if (ret)
+		goto err_reset_state;
+
 	cpus_read_unlock();
 
 	return 0;
-- 
2.33.0