diff options
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index e4a306c8ff1b..5a76086ff09b 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -247,11 +247,13 @@ int cpufreq_governor_dbs(struct dbs_data *dbs_data, dbs_data->gov_dbs_timer); } - rc = sysfs_create_group(cpufreq_global_kobject, - dbs_data->attr_group); - if (rc) { - mutex_unlock(&dbs_data->mutex); - return rc; + if (!policy->governor->initialized) { + rc = sysfs_create_group(cpufreq_global_kobject, + dbs_data->attr_group); + if (rc) { + mutex_unlock(&dbs_data->mutex); + return rc; + } } /* @@ -262,13 +264,15 @@ int cpufreq_governor_dbs(struct dbs_data *dbs_data, cs_dbs_info->down_skip = 0; cs_dbs_info->enable = 1; cs_dbs_info->requested_freq = policy->cur; - cpufreq_register_notifier(cs_ops->notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); - if (!policy->governor->initialized) + if (!policy->governor->initialized) { + cpufreq_register_notifier(cs_ops->notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); + dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10); + } } else { od_dbs_info->rate_mult = 1; od_dbs_info->sample_type = OD_NORMAL_SAMPLE; @@ -311,11 +315,13 @@ unlock: mutex_lock(&dbs_data->mutex); mutex_destroy(&cpu_cdbs->timer_mutex); - sysfs_remove_group(cpufreq_global_kobject, - dbs_data->attr_group); - if (dbs_data->governor == GOV_CONSERVATIVE) - cpufreq_unregister_notifier(cs_ops->notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); + if (policy->governor->initialized == 1) { + sysfs_remove_group(cpufreq_global_kobject, + dbs_data->attr_group); + if (dbs_data->governor == GOV_CONSERVATIVE) + cpufreq_unregister_notifier(cs_ops->notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); + } mutex_unlock(&dbs_data->mutex); break; |