[CPUFREQ] handle sysfs errors

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/cpufreq/cpufreq_userspace.c b/drivers/cpufreq/cpufreq_userspace.c
index a06c204589c..2a4eb0bfaf3 100644
--- a/drivers/cpufreq/cpufreq_userspace.c
+++ b/drivers/cpufreq/cpufreq_userspace.c
@@ -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;
 }