#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/cpufreq.h>
+#include <linux/cpu.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/sysfs.h>
unsigned int event)
{
unsigned int cpu = policy->cpu;
+ int rc = 0;
+
switch (event) {
case CPUFREQ_GOV_START:
if (!cpu_online(cpu))
return -EINVAL;
BUG_ON(!policy->cur);
mutex_lock(&userspace_mutex);
+ rc = sysfs_create_file (&policy->kobj,
+ &freq_attr_scaling_setspeed.attr);
+ if (rc)
+ goto start_out;
+
cpu_is_managed[cpu] = 1;
cpu_min_freq[cpu] = policy->min;
cpu_max_freq[cpu] = policy->max;
cpu_cur_freq[cpu] = policy->cur;
cpu_set_freq[cpu] = policy->cur;
- sysfs_create_file (&policy->kobj, &freq_attr_scaling_setspeed.attr);
dprintk("managing cpu %u started (%u - %u kHz, currently %u kHz)\n", cpu, cpu_min_freq[cpu], cpu_max_freq[cpu], cpu_cur_freq[cpu]);
+start_out:
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_STOP:
mutex_unlock(&userspace_mutex);
break;
}
- return 0;
+ return rc;
}