diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-09-19 11:17:18 +1000 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-09-19 11:17:18 +1000 |
commit | ffa0c722edfe3b85a03e5a861a5861c5c6e493f9 (patch) | |
tree | 429883e6696f31807096c09e83920fd91d938b4d | |
parent | ec7b03e5477c76b1bc82f7b92770a4531f6aefbf (diff) | |
parent | 032fb7dc48e198210c94f57fc721f8249225c9ef (diff) |
Merge remote-tracking branch 'pm/linux-next'
-rw-r--r-- | drivers/cpufreq/cpufreq.c | 29 | ||||
-rw-r--r-- | drivers/pci/pci-acpi.c | 6 |
2 files changed, 22 insertions, 13 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 43c24aa756f6..82ecbe39dfb0 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -952,9 +952,20 @@ static void update_policy_cpu(struct cpufreq_policy *policy, unsigned int cpu) if (cpu == policy->cpu) return; + /* + * Take direct locks as lock_policy_rwsem_write wouldn't work here. + * Also lock for last cpu is enough here as contention will happen only + * after policy->cpu is changed and after it is changed, other threads + * will try to acquire lock for new cpu. And policy is already updated + * by then. + */ + down_write(&per_cpu(cpu_policy_rwsem, policy->cpu)); + policy->last_cpu = policy->cpu; policy->cpu = cpu; + up_write(&per_cpu(cpu_policy_rwsem, policy->last_cpu)); + #ifdef CONFIG_CPU_FREQ_TABLE cpufreq_frequency_table_update_policy_cpu(policy); #endif @@ -1125,7 +1136,7 @@ static int cpufreq_nominate_new_policy_cpu(struct cpufreq_policy *policy, int ret; /* first sibling now owns the new sysfs dir */ - cpu_dev = get_cpu_device(cpumask_first(policy->cpus)); + cpu_dev = get_cpu_device(cpumask_any_but(policy->cpus, old_cpu)); /* Don't touch sysfs files during light-weight tear-down */ if (frozen) @@ -1189,12 +1200,9 @@ static int __cpufreq_remove_dev_prepare(struct device *dev, policy->governor->name, CPUFREQ_NAME_LEN); #endif - WARN_ON(lock_policy_rwsem_write(cpu)); + lock_policy_rwsem_read(cpu); cpus = cpumask_weight(policy->cpus); - - if (cpus > 1) - cpumask_clear_cpu(cpu, policy->cpus); - unlock_policy_rwsem_write(cpu); + unlock_policy_rwsem_read(cpu); if (cpu != policy->cpu) { if (!frozen) @@ -1203,9 +1211,7 @@ static int __cpufreq_remove_dev_prepare(struct device *dev, new_cpu = cpufreq_nominate_new_policy_cpu(policy, cpu, frozen); if (new_cpu >= 0) { - WARN_ON(lock_policy_rwsem_write(cpu)); update_policy_cpu(policy, new_cpu); - unlock_policy_rwsem_write(cpu); if (!frozen) { pr_debug("%s: policy Kobject moved to cpu: %d " @@ -1237,9 +1243,12 @@ static int __cpufreq_remove_dev_finish(struct device *dev, return -EINVAL; } - lock_policy_rwsem_read(cpu); + WARN_ON(lock_policy_rwsem_write(cpu)); cpus = cpumask_weight(policy->cpus); - unlock_policy_rwsem_read(cpu); + + if (cpus > 1) + cpumask_clear_cpu(cpu, policy->cpus); + unlock_policy_rwsem_write(cpu); /* If cpu is last user of policy, free policy */ if (cpus == 1) { diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 7c29ee4ed0ae..b0299e6d9a3f 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -47,6 +47,9 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context) if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev) return; + if (pci_dev->pme_poll) + pci_dev->pme_poll = false; + if (pci_dev->current_state == PCI_D3cold) { pci_wakeup_event(pci_dev); pm_runtime_resume(&pci_dev->dev); @@ -57,9 +60,6 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context) if (pci_dev->pme_support) pci_check_pme_status(pci_dev); - if (pci_dev->pme_poll) - pci_dev->pme_poll = false; - pci_wakeup_event(pci_dev); pm_runtime_resume(&pci_dev->dev); |