driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/ICTP7R ---------------------------------------------------------------------- Hold the lock to avoid concurrency problems in cpufreq_enable_boost_support() when assigning cpufreq_driver->set_boost. Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com> Signed-off-by: Hongye Lin <linhongye@h-partners.com> --- drivers/cpufreq/cpufreq.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index d9d7088b066d..26b18bc2b3cb 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2828,13 +2828,17 @@ static void remove_boost_sysfs_file(void) int cpufreq_enable_boost_support(void) { + unsigned long flags; + if (!cpufreq_driver) return -EINVAL; if (cpufreq_boost_supported()) return 0; + write_lock_irqsave(&cpufreq_driver_lock, flags); cpufreq_driver->set_boost = cpufreq_boost_set_sw; + write_unlock_irqrestore(&cpufreq_driver_lock, flags); /* This will get removed on driver unregister */ return create_boost_sysfs_file(); -- 2.33.0