diff options
| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | 2013-09-06 23:53:55 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-09-10 04:49:47 +0400 |
| commit | 56d07db274b7b15ca38b60ea4a762d40de093000 (patch) | |
| tree | e0168e68e3957a3122b1ed8069799b53078a0b05 | |
| parent | 4f750c930822b92df74327a4d1364eff87701360 (diff) | |
| download | linux-56d07db274b7b15ca38b60ea4a762d40de093000.tar.xz | |
cpufreq: Remove temporary fix for race between CPU hotplug and sysfs-writes
Commit "cpufreq: serialize calls to __cpufreq_governor()" had been a temporary
and partial solution to the race condition between writing to a cpufreq sysfs
file and taking a CPU offline. Now that we have a proper and complete solution
to that problem, remove the temporary fix.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 7 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 1 |
2 files changed, 1 insertions, 7 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index cf016584b4ac..2863214c5381 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1739,15 +1739,13 @@ static int __cpufreq_governor(struct cpufreq_policy *policy, policy->cpu, event); mutex_lock(&cpufreq_governor_lock); - if (policy->governor_busy - || (policy->governor_enabled && event == CPUFREQ_GOV_START) + if ((policy->governor_enabled && event == CPUFREQ_GOV_START) || (!policy->governor_enabled && (event == CPUFREQ_GOV_LIMITS || event == CPUFREQ_GOV_STOP))) { mutex_unlock(&cpufreq_governor_lock); return -EBUSY; } - policy->governor_busy = true; if (event == CPUFREQ_GOV_STOP) policy->governor_enabled = false; else if (event == CPUFREQ_GOV_START) @@ -1776,9 +1774,6 @@ static int __cpufreq_governor(struct cpufreq_policy *policy, ((event == CPUFREQ_GOV_POLICY_EXIT) && !ret)) module_put(policy->governor->owner); - mutex_lock(&cpufreq_governor_lock); - policy->governor_busy = false; - mutex_unlock(&cpufreq_governor_lock); return ret; } diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index cca885dac1d3..d568f3975eeb 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -76,7 +76,6 @@ struct cpufreq_policy { struct cpufreq_governor *governor; /* see below */ void *governor_data; bool governor_enabled; /* governor start/stop flag */ - bool governor_busy; struct work_struct update; /* if update_policy() needs to be * called, but you're in IRQ context */ |