[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>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d91330432ba2..a45cc89e387a 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -722,8 +722,13 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
                         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 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
                 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