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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-18 15:35:59 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-18 15:35:59 +0200
commit878f6e074e9a7784a6e351512eace4ccb3542eef (patch)
tree7a22a91465ec075f537a02c29407457aeeabaab5 /drivers/cpufreq
parent0e25246fb3d7455dc3405435da70156370e285ec (diff)
downloadlinux-878f6e074e9a7784a6e351512eace4ccb3542eef.tar.bz2
Revert "cpufreq: Use cpufreq_policy_list for iterating over policies"
Revert commit eb60852 (cpufreq: Use cpufreq_policy_list for iterating over policies), because it breaks system suspend/resume on multiple machines. It either causes resume to block indefinitely or causes the BUG_ON() in lock_policy_rwsem_##mode() to trigger on sysfs accesses to cpufreq attributes. Conflicts: drivers/cpufreq/cpufreq.c
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 37a687467329..c0ef84d601b7 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -969,8 +969,8 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
struct cpufreq_policy *policy;
unsigned long flags;
#ifdef CONFIG_HOTPLUG_CPU
- struct cpufreq_policy *tpolicy;
struct cpufreq_governor *gov;
+ int sibling;
#endif
if (cpu_is_offline(cpu))
@@ -993,10 +993,11 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
#ifdef CONFIG_HOTPLUG_CPU
/* Check if this cpu was hot-unplugged earlier and has siblings */
read_lock_irqsave(&cpufreq_driver_lock, flags);
- list_for_each_entry(tpolicy, &cpufreq_policy_list, policy_list) {
- if (cpumask_test_cpu(cpu, tpolicy->related_cpus)) {
+ for_each_online_cpu(sibling) {
+ struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);
+ if (cp && cpumask_test_cpu(cpu, cp->related_cpus)) {
read_unlock_irqrestore(&cpufreq_driver_lock, flags);
- ret = cpufreq_add_policy_cpu(tpolicy, cpu, dev, frozen);
+ ret = cpufreq_add_policy_cpu(cp, cpu, dev, frozen);
up_read(&cpufreq_rwsem);
return ret;
}