From: Lifeng Zheng <zhenglifeng1@huawei.com>
Date: Wed, 9 Jul 2025 10:41:45 +0000 (+0800)
Subject: cpufreq: Exit governor when failed to start old governor
X-Git-Tag: v6.12.43~333
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bd5cd23c7ae47ebf2ed27ff0e8cc837456041426;p=thirdparty%2Fkernel%2Fstable.git

cpufreq: Exit governor when failed to start old governor

[ Upstream commit 0ae204405095abfbc2d694ee0fbb49bcbbe55c57 ]

Detect the result of starting old governor in cpufreq_set_policy(). If it
fails, exit the governor and clear policy->governor.

Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Link: https://patch.msgid.link/20250709104145.2348017-5-zhenglifeng1@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index fab94ffcb22ce..bd55c23563035 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2724,10 +2724,12 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
 	pr_debug("starting governor %s failed\n", policy->governor->name);
 	if (old_gov) {
 		policy->governor = old_gov;
-		if (cpufreq_init_governor(policy))
+		if (cpufreq_init_governor(policy)) {
 			policy->governor = NULL;
-		else
-			cpufreq_start_governor(policy);
+		} else if (cpufreq_start_governor(policy)) {
+			cpufreq_exit_governor(policy);
+			policy->governor = NULL;
+		}
 	}
 
 	return ret;