Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Fix stale cpufreq_cpu_governor pointer
  [CPUFREQ] Resolve time unit thinko in ondemand/conservative govs
  [CPUFREQ] speedstep-ich: fix error caused by 394122ab144dae4b276d74644a2f11c44a60ac5c
  [CPUFREQ] Fix use after free on governor restore
  [CPUFREQ] acpi-cpufreq: blacklist Intel 0f68: Fix HT detection and put in notification message
  [CPUFREQ] powernow-k8: Fix test in get_transition_latency()
  [CPUFREQ] longhaul: select Longhaul version 2 for capable CPUs

3 files changed, 44 insertions, 12 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 3938c78..ff57c40 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -41,7 +41,7 @@ static struct cpufreq_driver *cpufreq_driver;
 static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
 #ifdef CONFIG_HOTPLUG_CPU
 /* This one keeps track of the previously set governor of a removed CPU */
-static DEFINE_PER_CPU(struct cpufreq_governor *, cpufreq_cpu_governor);
+static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
 #endif
 static DEFINE_SPINLOCK(cpufreq_driver_lock);
 
@@ -774,10 +774,12 @@ int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy,
 #ifdef CONFIG_SMP
 	unsigned long flags;
 	unsigned int j;
-
 #ifdef CONFIG_HOTPLUG_CPU
-	if (per_cpu(cpufreq_cpu_governor, cpu)) {
-		policy->governor = per_cpu(cpufreq_cpu_governor, cpu);
+	struct cpufreq_governor *gov;
+
+	gov = __find_governor(per_cpu(cpufreq_cpu_governor, cpu));
+	if (gov) {
+		policy->governor = gov;
 		dprintk("Restoring governor %s for cpu %d\n",
 		       policy->governor->name, cpu);
 	}
@@ -949,10 +951,13 @@ err_out_kobj_put:
 static int cpufreq_add_dev(struct sys_device *sys_dev)
 {
 	unsigned int cpu = sys_dev->id;
-	int ret = 0;
+	int ret = 0, found = 0;
 	struct cpufreq_policy *policy;
 	unsigned long flags;
 	unsigned int j;
+#ifdef CONFIG_HOTPLUG_CPU
+	int sibling;
+#endif
 
 	if (cpu_is_offline(cpu))
 		return 0;
@@ -999,7 +1004,19 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
 	INIT_WORK(&policy->update, handle_update);
 
 	/* Set governor before ->init, so that driver could check it */
-	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
+#ifdef CONFIG_HOTPLUG_CPU
+	for_each_online_cpu(sibling) {
+		struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);
+		if (cp && cp->governor &&
+		    (cpumask_test_cpu(cpu, cp->related_cpus))) {
+			policy->governor = cp->governor;
+			found = 1;
+			break;
+		}
+	}
+#endif
+	if (!found)
+		policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 	/* call driver. From then on the cpufreq must be able
 	 * to accept all calls to ->verify and ->setpolicy for this CPU
 	 */
@@ -1111,7 +1128,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
 #ifdef CONFIG_SMP
 
 #ifdef CONFIG_HOTPLUG_CPU
-	per_cpu(cpufreq_cpu_governor, cpu) = data->governor;
+	strncpy(per_cpu(cpufreq_cpu_governor, cpu), data->governor->name,
+			CPUFREQ_NAME_LEN);
 #endif
 
 	/* if we have other CPUs still registered, we need to unlink them,
@@ -1135,7 +1153,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
 				continue;
 			dprintk("removing link for cpu %u\n", j);
 #ifdef CONFIG_HOTPLUG_CPU
-			per_cpu(cpufreq_cpu_governor, j) = data->governor;
+			strncpy(per_cpu(cpufreq_cpu_governor, j),
+				data->governor->name, CPUFREQ_NAME_LEN);
 #endif
 			cpu_sys_dev = get_cpu_sysdev(j);
 			sysfs_remove_link(&cpu_sys_dev->kobj, "cpufreq");
@@ -1606,9 +1625,22 @@ EXPORT_SYMBOL_GPL(cpufreq_register_governor);
 
 void cpufreq_unregister_governor(struct cpufreq_governor *governor)
 {
+#ifdef CONFIG_HOTPLUG_CPU
+	int cpu;
+#endif
+
 	if (!governor)
 		return;
 
+#ifdef CONFIG_HOTPLUG_CPU
+	for_each_present_cpu(cpu) {
+		if (cpu_online(cpu))
+			continue;
+		if (!strcmp(per_cpu(cpufreq_cpu_governor, cpu), governor->name))
+			strcpy(per_cpu(cpufreq_cpu_governor, cpu), "\0");
+	}
+#endif
+
 	mutex_lock(&cpufreq_governor_mutex);
 	list_del(&governor->governor_list);
 	mutex_unlock(&cpufreq_governor_mutex);
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index bc33ddc..c7b081b 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -116,9 +116,9 @@ static inline cputime64_t get_cpu_idle_time_jiffy(unsigned int cpu,
 
 	idle_time = cputime64_sub(cur_wall_time, busy_time);
 	if (wall)
-		*wall = cur_wall_time;
+		*wall = (cputime64_t)jiffies_to_usecs(cur_wall_time);
 
-	return idle_time;
+	return (cputime64_t)jiffies_to_usecs(idle_time);;
 }
 
 static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 071699d..4b34ade 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -133,9 +133,9 @@ static inline cputime64_t get_cpu_idle_time_jiffy(unsigned int cpu,
 
 	idle_time = cputime64_sub(cur_wall_time, busy_time);
 	if (wall)
-		*wall = cur_wall_time;
+		*wall = (cputime64_t)jiffies_to_usecs(cur_wall_time);
 
-	return idle_time;
+	return (cputime64_t)jiffies_to_usecs(idle_time);
 }
 
 static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)