[CPUFREQ] check sysfs_create_link return value
Trivial patch to check sysfs_create_link return values.
Fail gracefully if needed.
Signed-off-by: Ahmed Darwish <darwish.07@gmail.com>
Signed-off-by: Dave Jones <davej@redhat.com>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d913304..a45cc89 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -722,8 +722,13 @@
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
dprintk("CPU already managed, adding link\n");
- sysfs_create_link(&sys_dev->kobj,
- &managed_policy->kobj, "cpufreq");
+ ret = sysfs_create_link(&sys_dev->kobj,
+ &managed_policy->kobj,
+ "cpufreq");
+ if (ret) {
+ mutex_unlock(&policy->lock);
+ goto err_out_driver_exit;
+ }
cpufreq_debug_enable_ratelimit();
mutex_unlock(&policy->lock);
@@ -770,8 +775,12 @@
dprintk("CPU %u already managed, adding link\n", j);
cpufreq_cpu_get(cpu);
cpu_sys_dev = get_cpu_sysdev(j);
- sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj,
- "cpufreq");
+ ret = sysfs_create_link(&cpu_sys_dev->kobj, &policy->kobj,
+ "cpufreq");
+ if (ret) {
+ mutex_unlock(&policy->lock);
+ goto err_out_unregister;
+ }
}
policy->governor = NULL; /* to assure that the starting sequence is