cpufreq: Init policy->rwsem before it may be possibly used

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[ Upstream commit d1378d1d7e ]

In cpufreq_policy_put_kobj(), policy->rwsem is used. But in
cpufreq_policy_alloc(), if freq_qos_add_notifier() returns an error, error
path via err_kobj_remove or err_min_qos_notifier will be reached and
cpufreq_policy_put_kobj() will be called before policy->rwsem is
initialized. Thus, the calling of init_rwsem() should be moved to where
before these two error paths can be reached.

Fixes: 67d874c3b2 ("cpufreq: Register notifiers with the PM QoS framework")
Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Link: https://patch.msgid.link/20250709104145.2348017-3-zhenglifeng1@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Lifeng Zheng 2025-07-09 18:41:43 +08:00 • committed by Greg Kroah-Hartman

parent 494c213792

commit 8e4b38710d

1 changed files with 2 additions and 1 deletions

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drivers/cpufreq/cpufreq.c

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