[CPUFREQ] hotplug cpu fix for powernow-k8

[linux-2.6-microblaze.git] / arch / i386 / kernel / cpu / cpufreq / powernow-k8.c

diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
index e5bc064..712a26b 100644 (file)
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
@@ -40,6 +40,7 @@
 
 #ifdef CONFIG_X86_POWERNOW_K8_ACPI
 #include <linux/acpi.h>
+#include <linux/mutex.h>
 #include <acpi/processor.h>
 #endif
 
@@ -49,7 +50,7 @@
 #include "powernow-k8.h"
 
 /* serialize freq changes  */
-static DECLARE_MUTEX(fidvid_sem);
+static DEFINE_MUTEX(fidvid_mutex);
 
 static struct powernow_k8_data *powernow_data[NR_CPUS];
 
@@ -943,17 +944,17 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
        if (cpufreq_frequency_table_target(pol, data->powernow_table, targfreq, relation, &newstate))
                goto err_out;
 
-       down(&fidvid_sem);
+       mutex_lock(&fidvid_mutex);
 
        powernow_k8_acpi_pst_values(data, newstate);
 
        if (transition_frequency(data, newstate)) {
                printk(KERN_ERR PFX "transition frequency failed\n");
                ret = 1;
-               up(&fidvid_sem);
+               mutex_unlock(&fidvid_mutex);
                goto err_out;
        }
-       up(&fidvid_sem);
+       mutex_unlock(&fidvid_mutex);
 
        pol->cur = find_khz_freq_from_fid(data->currfid);
        ret = 0;
@@ -1094,10 +1095,15 @@ static int __devexit powernowk8_cpu_exit (struct cpufreq_policy *pol)
 
 static unsigned int powernowk8_get (unsigned int cpu)
 {
-       struct powernow_k8_data *data = powernow_data[cpu];
+       struct powernow_k8_data *data;
        cpumask_t oldmask = current->cpus_allowed;
        unsigned int khz = 0;
 
+       data = powernow_data[first_cpu(cpu_core_map[cpu])];
+
+       if (!data)
+               return -EINVAL;
+
        set_cpus_allowed(current, cpumask_of_cpu(cpu));
        if (smp_processor_id() != cpu) {
                printk(KERN_ERR PFX "limiting to CPU %d failed in powernowk8_get\n", cpu);