diff options
| author | Tony Lindgren <tony@atomide.com> | 2018-08-28 09:58:03 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2018-08-28 09:58:03 -0700 |
| commit | ea4d65f14f6aaa53e379b93c5544245ef081b3e7 (patch) | |
| tree | a15485f4f1cf547a52b31fa8e16e14b9579b7200 /drivers/cpufreq/cpufreq.c | |
| parent | ce32d59ee2cd036f6e8a6ed17a06a0b0bec5c67c (diff) | |
| parent | 496f3347d834aec91c38b45d6249ed00f58ad233 (diff) | |
Merge branch 'perm-fix' into omap-for-v4.19/fixes-v2
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b0dfd3222013..f53fb41efb7b 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -923,7 +923,12 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr, struct freq_attr *fattr = to_attr(attr); ssize_t ret = -EINVAL; - cpus_read_lock(); + /* + * cpus_read_trylock() is used here to work around a circular lock + * dependency problem with respect to the cpufreq_register_driver(). + */ + if (!cpus_read_trylock()) + return -EBUSY; if (cpu_online(policy->cpu)) { down_write(&policy->rwsem); @@ -2236,6 +2241,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy, policy->min = new_policy->min; policy->max = new_policy->max; + trace_cpu_frequency_limits(policy); policy->cached_target_freq = UINT_MAX; |