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authorchenqiwu <chenqiwu@xiaomi.com>2020-01-20 15:41:28 +0800
committerViresh Kumar <viresh.kumar@linaro.org>2020-01-20 13:23:34 +0530
commita48ac1c9f294e1a9b692d9458de6e6b58da8b07d (patch)
treee559f9035cc3279af1a1b0897b15b5bcbe0a35f4 /.mailmap
parent8ead819f1befae08182c772b6fdf8ac201b34566 (diff)
cpufreq: brcmstb-avs: fix imbalance of cpufreq policy refcount
brcm_avs_cpufreq_get() calls cpufreq_cpu_get() to get the cpufreq policy, meanwhile, it also increments the kobject reference count to mark it busy. However, a corresponding call of cpufreq_cpu_put() is ignored to decrement the kobject reference count back, which may lead to a potential stuck risk that the cpuhp thread deadly waits for dropping of kobject refcount when cpufreq policy free. With this patch, the cpuhp thread can be easily exercised by attempting to force an unbind of the CPUfreq driver. Signed-off-by: chenqiwu <chenqiwu@xiaomi.com> [ Viresh: Dropped !policy check ] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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