redonkable/remarkable-linux
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[CPUFREQ] handle sysfs errors

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Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Jeff Garzik 2006-10-20 14:31:00 -07:00 committed by Dave Jones
parent 95dd722700
commit 914f7c31b0
3 changed files with 29 additions and 4 deletions
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10
drivers/cpufreq/cpufreq_conservative.c
View file

@ -453,6 +453,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
unsigned int cpu = policy->cpu;
struct cpu_dbs_info_s *this_dbs_info;
unsigned int j;
int rc;
this_dbs_info = &per_cpu(cpu_dbs_info, cpu);
@ -469,6 +470,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
break;
mutex_lock(&dbs_mutex);
rc = sysfs_create_group(&policy->kobj, &dbs_attr_group);
if (rc) {
mutex_unlock(&dbs_mutex);
return rc;
}
for_each_cpu_mask(j, policy->cpus) {
struct cpu_dbs_info_s *j_dbs_info;
j_dbs_info = &per_cpu(cpu_dbs_info, j);
@ -481,7 +489,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
this_dbs_info->enable = 1;
this_dbs_info->down_skip = 0;
this_dbs_info->requested_freq = policy->cur;
sysfs_create_group(&policy->kobj, &dbs_attr_group);
dbs_enable++;
/*
* Start the timerschedule work, when this governor

12
drivers/cpufreq/cpufreq_ondemand.c
View file

@ -473,6 +473,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
unsigned int cpu = policy->cpu;
struct cpu_dbs_info_s *this_dbs_info;
unsigned int j;
int rc;
this_dbs_info = &per_cpu(cpu_dbs_info, cpu);
@ -501,6 +502,16 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
return -ENOSPC;
}
}
rc = sysfs_create_group(&policy->kobj, &dbs_attr_group);
if (rc) {
if (dbs_enable == 1)
destroy_workqueue(kondemand_wq);
dbs_enable--;
mutex_unlock(&dbs_mutex);
return rc;
}
for_each_cpu_mask(j, policy->cpus) {
struct cpu_dbs_info_s *j_dbs_info;
j_dbs_info = &per_cpu(cpu_dbs_info, j);
@ -510,7 +521,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
j_dbs_info->prev_cpu_wall = get_jiffies_64();
}
this_dbs_info->enable = 1;
sysfs_create_group(&policy->kobj, &dbs_attr_group);
/*
* Start the timerschedule work, when this governor
* is used for first time

11
drivers/cpufreq/cpufreq_userspace.c
View file

@ -131,19 +131,26 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
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:
@ -180,7 +187,7 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
mutex_unlock(&userspace_mutex);
break;
}
return 0;
return rc;
}