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cpufreq: Exit governor when failed to start old governor

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[ 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>
This commit is contained in:
Lifeng Zheng
2025-07-09 18:41:45 +08:00
committed by Greg Kroah-Hartman
parent f8c816e361
commit 9b02fdb0f6
1 changed files with 5 additions and 3 deletions
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8
drivers/cpufreq/cpufreq.c
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@@ -2545,10 +2545,12 @@ 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;