linux-kernel - [PATCH 1/7] cpufreq: Disable cpufreq-based invariance when fail to register driver

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Message-ID: <20250623133402.3120230-2-zhenglifeng1@huawei.com>
Date: Mon, 23 Jun 2025 21:33:56 +0800
From: Lifeng Zheng <zhenglifeng1@...wei.com>
To: <rafael@...nel.org>, <viresh.kumar@...aro.org>, <ionela.voinescu@....com>
CC: <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
	<linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <lihuisong@...wei.com>, <yubowen8@...wei.com>,
	<zhenglifeng1@...wei.com>
Subject: [PATCH 1/7] cpufreq: Disable cpufreq-based invariance when fail to register driver

The cpufreq-based invariance is enabled in cpufreq_register_driver(), but
never disabled after that when fail. Add a
static_branch_disable_cpuslocked() to do that as
cpufreq_unregister_driver() does.

Fixes: 874f63531064 ("cpufreq: report whether cpufreq supports Frequency Invariance (FI)")
Signed-off-by: Lifeng Zheng <zhenglifeng1@...wei.com>
---
 drivers/cpufreq/cpufreq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d7426e1d8bdd..1bc665b5bba8 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2991,6 +2991,7 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 err_boost_unreg:
 	remove_boost_sysfs_file();
 err_null_driver:
+	static_branch_disable_cpuslocked(&cpufreq_freq_invariance);
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
 	cpufreq_driver = NULL;
 	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-- 
2.33.0